Oil Processing

     Around the web and even in nutrition text books, we often  are referred to the vague term processing in regards to food stuffs manufacturing. I think most health conscious individuals acknowledge that processing is generally deleterious to the health providing qualities of food. For example refined flour, refined sugar, refined oil, etc. However I have often found that understanding the so called processing that takes place, even if only in a rudimentary manner, gives me further motivation to not eat industrialized food stuffs. I guess one might say actually knowing the methods behind the madness makes the food that much more unappeasing. Today I wanted to go over the steps from which a soybean, cotton kernel, corn kernel, and other seeds become industrial oils. I attribute much of the following information to be sourced from the online Encyclopedia Brittanica and Fats that Heal, Fats that Kill* by Udo Erasmus.

      The initiation of the process that takes a commodity seed to oil begins with general cleaning of the seed and possibly cooking. On one hand, the cooking is neccessary. Many of the seeds used, such as soy beans contain anti-nutrients such as trypsin inhibitors (1) that are only inactivated with heat. The raw oil would otherwise be inedible. Another advantage of this specific step is that heating the seed makes the pressing process (this is the following step) or the chemical extraction process (to be explained later) easier by denaturing the cell membranes which encompass the desired oils. However on the other other hand, the cooking process greatly accelerates the onset of rancidity exposing the oils to both air and heat, and possibly light (Textbook of Medical Biochemistry, Ramakrishnan, P.41) . This is confounded by the fact that most of the common commercial oils contain high proportions of the more delicate polyunsaturated fats( Ramakrishnan, P. 267).

Typical oil seeds; corn, cotton, soy, sunflower

     The next step in the process is the mechanical pressing of the seeds to extract oil. We often see this on the label of more traditional oils such as coconut, palm, and olive oils as expeller pressed. The method essentially involves subjecting the raw material to high amounts of mechanical pressure. Often times what is called a screw press is used (illustration below). This involves a continuoulsy rotating screw shaped auger pushing the seeds forward against a metal press. The friction created by the rotating auger combines with the high heat to squeeze the oil out of the seeds.The oil is released by of hole or slits in the press while the remaining solid mass(seed mash) is left behind for further processing. Accoridng to Erasmus, (p. 95) it is said that the pressing temperature takes place at 85 to 95 degrees Celsius or185 to 203 F, which subsequently  greatly increases the rate of lipid rancidity. When the end product of this mechanical extraction is sold without further processing, we have the true unrefined oils.

screw press, sounds like a resistance training exercise.

     Another consideration here is that saturated fats such as coconout and palm are less prone to be damaged by the high temperatures used (Ramakrishnan, P. 39,41). Although some companies claim to use cold pressed, Erasmus states there is not a set industry standard for this criterion or claim. The next procees described is solvent extraction, a more modern industrial practice used to further enhance the oil extraction from the seed mash, or that can be used independent of mechanical pressing.

      Solvent extraction is a very efficient means of oil extraction used by large scale industrial operations. Solvents such as heptane or hexane are used to dissolve ground seed meal or the remaining seed mash described above whilst also using mechanical agitation (think stirring on steroids). The solvent-oil mixture is separated from the naturally occuring protein and carbohydrate portion of the original seed. The same thing is going on here as the saying about oil & water dont mix. The heptane is similar to oil so it mixes while the protein, carbs, and water are repelled.) The solvent can then be evaporated at roughly 150 degrees Celsius or 302 F. The seed oil is then left behind with very minute quantities of the solvents left behind. The ranges I have found are in the range of  10-21 ppm (2). Although I am not a fan of hexane, I will say that the concentration left behind in oils does not seem to be a major casuse for concern (although there are many). What may be disconcerning to some health conscious consumers is that the solvent extracted oil may still be labeled as unrefined at this point, again placing greater importance to choosing  the expeller pressed brands if hexane is a key concern for the consumer.For the more commonly sold vbegetable oils and the oils labeled as refined, such as Spectrum refined coconut oil or NOW brands natural coconut oil, further chemical processing takes place.

       Degumming, or alkali refining is a process that removes the phospholipids naturally occuring in seed oils, such as soy lecithin (phospholipid wiki). Left behind proteins and polysaccharides (complex carbohydrates) from the preceeding extraction methods are also removed during degumming. As far as the possible health worries Erasmus claims that degumming removes chlorophyll, calcium, magnesium, iron, and copper. The degumming process is generally carried out at roughly 140 F (Erasmus, P. 96).

      During the process known as water refining or just refining, oils are mixed with strong bases  (proton or hydrogen ion acceptors that completely dissolve in water) such as sodium hydroxide (NaOH). Refining is meant to further remove free fatty acids from oils.The free fatty acids form soaps with the bases (eg NaOH) and dissolve in the hydrophilic (water loving) portion of the mixture. This aqueous solution is then drained off, or centrifuged and then drained off from the oil. The temperature at which refining takes place is roughly 75 degrees celcius or 167 F. Phospholipids, polypeptides, and minerals are also lost in this process (Erasmus, P. 96). Before moving on, I have to make note that at this point, the proccessing of the oil has not only removed health promoting components of the oil like lecithin and minerals like iron, zinc, and so forth, but that they are then sold back to consumers in the form of soap, soy lecithin, etc.Its pretty crazy. Although pigments may still remain., theyl'l be gone soon enough. Next up are bleaching and deodorizing.

     Bleaching is used if removal of the pigments is desired. The remaining oil treated with various bleaching agents, which may include fuller’s earth (a natural earthy material that will decolorize oils), activated carbon, or activated clays. The bleaching agents mentioned remove beneficial pigments such as chlorophyll and beta-carotene.Magnesium is stored in the chlorophyll and beta carotene is a pre cursor to Vitamin A. Additionally if the centrifuge method was not used during refinement, additonal FFAs may be removed during bleaching. The temperature at which this process takes place is 110 Celsius or 230 F. According to Erasmus, this process forms toxic peroxides as well (Erasmus P. 96).

    Deodorizing involves steam distillation under pressure. The deodorization removes any aromatic compounds that impart any remaining pungent taste or odor to the oil.  Erasmus notes that deodorization takes place a highly destructive temperatures in the range of 240 to 270 degrees Celsius or 465-520 F! And this process is said to last 30 to 60 minute depending on the oil. These temperatures are high enough to result in carcinogenic mutations to the remaining fats in the oil (3).  Trans-fatty acids are also formed at such high temperatures. Although deodorization removes some of the peroxides formed during earlier stages of processing , as well as pesticide residues, tocopherols (Vitamin E) and plant sterols are also removed as well. (Erasmus P.97)

      At this point, the oil processor has yielded a valuable commodity. Flavorless, colorless, tasteless oil (yum!) that can be further handled to add flavors, textures, colors, etc. that meet the consumer's demands for highly palatable cheap frankenfood. However, with the exception  of some of the healthier oils, such as palm, coconut, and olive oil, most of these will have synthetic antioxidants added in back as well, such as butylated hydroxytoluene (BHT), or tertiary butyhydroquinone (TBHQ). These replace the plant's natural antioxidants such as the above mentioned phytochemical, Vitamin E, and beta carotene.

     As you can establish for yourselves at this point, the processing of oils, while an intriguing science, does not appear to be the optimal method of foos extraction for promoting good health. In fact up until the late 20th century there were wide spread nutrient deficiencies due to processing food without the realization that key nutrients were lost. It was believed that  biologically complete diets need only to consistr sufficient proteins, carbohydrates, fats, inorganic salts, and water (4). Unfortunately or fortunately it was later discovered that we needed micronutrients in the form of vitamins, minerals, and phytochemicals. While fortification of foods with certain nutrients has probably helped, I still don't believe it's enough. Below I have created a table based the calculations of Weton A. Price in Nutrition and Physical Degeneration (P.246 & 247) to show just how lacking the American diet was compared to traditional diets in his time.The numbers are how many times more of the listed nutrient (eg Ca) that the traditional cultures recieved in contrast to urbanized  Americans at the time (mid 1930's) through diet. Its pretty amazing.

    With that said, processed oils (along with processed sugar and flour) just make up too much of the American diet. The USDA recently reported that we are consuming 1.4 billion pounds of cottonseed oil, alone, annually (see here).We are eating the oils of these seeds in proportions that we would never eat in the form of real food. I have blogged on this previously as well (here). The nutrient density is just not there in addition to the synergistic effect that I believe real food nutrients provide when eaten together as one in the context of real food.



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* While I found Erasmus's book helpful for this post, I think it is important to disclose he does sell his own oil blends that are focused more on the EFA rather than the coconut oil, palm, and olive oil I would reccomend. I believe eating the fat from sources like coconuts and olives that are mostly fat, when found in nature, is probably more suitable for humans in that eating large amounts of fat from these foods is not new to us as a species.

Cool Garden Idea; Root Cellars!

    If you have been reading this blog, you will know that I am an advocate of eating real food. Real foods are good, and real, local food is even better, with the hope that you may actually know a where it came from,who grew it, and so fourth. The best way I can think of to attain this peace of mind is to grow some of your own food, with a local farmer's market being the next best option. Small gardens can easily be kept up is the suburbs and even some urban settings depending on neighborhood lawn rules, size, etc. Today I wanted to share a cool  garden tip on storing some of your fresh foods, root cellaring. In most regions, vegetative growth isn't really feasible in the winter months so storing it is a great option. You can also use this method to store food from the market as well.

    Root cellars pretty much say it all in the name. They are an above or underground "cellar" used to store vegetables considered roots, such as carrots and parsnips, but also tubers such as potatoes sweet potatoes. However root cellars can also be used to store other garden staples such as squash (technically a fruit). When the winter hits, and these vegetables are at risk of frost, the root cellar is used to preserve them. Prior to the 2 car garage and refrigeration unit, root cellars were a commonality. Now a days most folks don't even know what one is. However, they don't have to be fancy and are very easy to install. For example, at the farm I have been working at, the proprietor has an old, broken refrigerator dug into the ground to serve as her root cellar. My mom recently picked up a couple of old coolers, so I decided to do the same thing with them a couple of days ago. Check it out.

In conclusion, root cellars are a good way to store some of your fresh veggies for the winter without taking up a bunch of space in the house or having to worry about rats, or other critters getting to try to steal your bounty. You can use just about anything that you can ensure is fairly closed off to the elements. Get creative!

Oh yeah, digging the hole for these things provides some nice exercise. Call before you dig lol.

Genetically Modified Foods; Friends or Foes

      So the last time I posted, I thought I would have another post up within 24 hrs. Yeah not so much. Sorry but time was not on my side.I finally determined what/where I will be doing a research project next year for my masters degree, and the I started my job milking on a small dairy this week.On Saturday I took a trip back to Chicago to find an apartment and listen to Jeffrey Smith give a presentation on genetically modified organisms (GMOs).  Anyways today I would like to do a post GMOs myself.

     First off I want to say that I am not against the idea of genetically altering foods. Plant and animal breeding has taken place since the advent of horticulture. However this form of genetic manipulation is what one would call vertical gene transfer.The desired genes are transferred down from the parent organisms to the offspring. For example, a cattleman and dairy farmer might cross breed their herds to yield a breed that is both productive for producing milk and well muscled for meat production. An example of this would be the breed known as the American Milking Shorthorn (productive milk and beef producer). Similar means are used to produce desirable plants and flowers. Most of us probably remember learning a bit about this back in Middle School or High School science classes with Gregor Mendel and his pea plants (see more here). GMOs, however, are not achieved via vertical gene transfer. The technology utilized involves the use of horizontal gene transfer.

American Milking Shorthorn

The production of GMOs relies on a form of horizontal gene alteration known as transformation.For a thorough description of this process, you may want to refer to this article by Michael Peel, of the agriculture extension agency at North Dakota State University (here). The shortened version is something like this; a desirable gene is identified and isolated, and transferred to a bacterial plasmid (a small circular piece of DNA) for protection. The plasmid is then inserted into the cells of the plant the scientists seek to alter, with the hope that the gene on the plasmid will teansfer to the target cell. The other, more common means of transfer is coating particles of metals such as gold with the genes of interest and shooting them into the target cells with a gene gun (sounds sci-fi right?)  The scientists can then use certain markers to identify if the gene transfer has taken place between the plasmid (remember its carrying the desirable genes) or the gene carrying particles and the target plant cells.


Diagram of the described horizontal gene transfer for the visual learners out there.

      Now that we've discussed how GMOs are made, lets take a look at the implications. Genetic modification is not only used in foods. This technology can also be used to produce pharmaceutical drugs, and supplements. It is used in industry to produce useful chemical agents, and can also be used for genetic mapping purposes. To the best of my knowledge, the technology used for artifical genetic modification has only been in use since the early 1970's coincident with the Green Revolution (discussion on green revolution). There first study I could find on the use of genetic modification dates back to '73 and was done by Stanley Cohen and colleagues at UC-San Francisco (1).

  In my opinion, the discoveries of Cohen and others during the green revolution were beneficial to the quality of life for mankind, with the increased production of  high quality food (although I cant say the same for the earth as a whole due to increased population pressure and environmental degradation). Contrary to others, I dont think the green revolution was spurred by malice. The occurence of the Green Revolution is a major reason the population has ballooned from 3.7 in 1970 roughly 7 billion today. In the words of Cohen et al,

   " Here is potentially useful for insertion of specific sequences from prokaryotic or eukaryotic chromosomes or extrachromosomal DNA into independently replicating bacterial plasmids."

 

    I believe the intent was great, but unfortunately overzealous corporations and policy makers have been too quick to allow the rapid proliferation of genetically modified crops into our food system and business practices have been less than scrupulous to say the least. In theory drought resisatant rice in sub saharan Africa sounds great to alleviate hunger in the region. I would love to see cold tolerant banana & cashew treeshere in my native midwest, but there are several catches to be considered.

   To begin with, the production of GMOs is most often carried out large corporations with profits in mind, more so than the greater good of man. Four companies, Syngenta, Dupont, Bayer, and Monsanto are thought to control more than half of the world's seeds (2) Monsanto alone holds over 650 seed patents! In addition to owning a lion's share of these market these companies do not have trhe greatest track record. For example it has been well reported in documentaries such as Unatural Selection the foreign media such as The Dailymail and The Telegraph across the pond in the UK that the practices of Monsanto led to massive suicide numbers by indian farmers. Anecdotally I have discussed with many India natives over the years as well. This 2008 article in The Dailymail by Andrew Malone describes the situation (3).

   The gist of it is that in India for millenia, farmers have farmed using heirloom seeds and re-collected the native seeds every year at no cost. In recent years, Monsanto has marketed their seeds to farmers promising higher yield. The farmers pay the premium for Monsanto's patented seeds and chemicals (Roundup anyone?) with loans expecting high yields to pay back their loans. Unfortunately the promised high yields have not come to fruition in many cases, leading the farmers to yield net loss rather than financial gain. Furthermore, since the seeds are Monsantos they cannot recollect them. They must but more seeds. Several farmers have been driven so far into debt that they are forced to relinquish their familt land, which has often been passed generation to generation for several genearations. The circumstances have led many to commit suicide. Fortunately activists such as Vandana Shiva are doing their part to educate the Indianfarmers and reclaim Indias farming sovereignity. Farming in smaller, "less developed" nations is less of a business and small farms can not afford to risk their financial livlihoods on promises of companies such as the four listed above. On another positive note, farmers in other nations have got the message as well.
 
    Coverage of the Haiti earthquake aftermath by the mainstream media died down pretty quickly, but the Huffington Post reported that Haitian farmers actually burned seeds "donated" by Monsanto. The article reported that  peasant farmer leader Chavannes Jean-Baptiste of the Peasant Movement of Papay (MPP) called for the immediate burning the of 60,000 seed sacks to be donated  by Monsanto, thus saving the farmers from having to continually purchase Monsanto seeds and the pesticides that often accompany the seeds. The farmers may or maynot have given up higher yileds by burning the seeds, but I have to agree with there decision, in that I would not want to play financial russian roulette with the Monsanto seeds either.

     Well its getting past my blogging time limit, and I have some gardening to do, so let me try to top this post off. Tomorrow I plan to discuss the health implications of GMOs. As I said I am not completely against the idea of gene modification and the improvement of plant characteristics, but as noted earlier the technology is extremely recent, relatively speaking, and I don't think these plants should have been introduced to our food system without thorough inspection on health implicationsfirst. Unfortunately that is not the case. Animal studies have been mixed in regardes to health findings in animal feeding models. Negative findings have included organ damage and sterility within 3 generations of feeding aniamls GMO feed! I plan to discuss this tomorrow.

   As I stated above, our media has not done a great job of informing the public on GMOs, the possible associated risks, and the bad business practices taking place. Below is the story of two respected journalists, Steve Wilson and Jane Akre who were censored from reporitng an unflattering news piece on a local Florida Fox station. No conspiracy here, as it makes perfect financial sense for media mogul Rupert Murdoch not to risk losing millions in advertising dollars from Monsanto for his Fox empire (see Murdoch wiki).

     In conclusion let me finish this up with a little positive news and a couple of resources. The knowledge on GMOs is finally going a little more mainstream. Prince Charles has actually been calling for cessation on the use of GMO and even spoke against factory farming just days after the recent royal wedding (4 & 5). Jeffrey Smith, one of the worlds leading advocates made a recent appearance on the Dr. Oz show to discuss GMOs (here). The Huffington Post   recently reported that 9 out of 10 Americans would like to see GMOs labeled (which they currently are not) and 53% of those polled stated they would make a conscious effort NOT to buy GMOs if they knew what foods they were found in (here).

I really have not discussed the health findings that may lead many to want to forfeit GMOs quite yet but for those interested in learning more I suggest navigating the Institute for Responsible Technology. There you can find non GMO shopping guides, as well as read the blog solely dedicated to GMOs, and download other resources such as audio CDs you can use for your own further education and to give to friends , family, etc.
Heres the link....
http://www.responsibletechnology.org/

Lastly (no really), a quick tip I often reccomend to avoid GMOs is to just avoid processed foods (as you should be doing anyway) and read your PLU's when you buy produce. If it begins with 4, it's conventional. If it begins with 9, it's organic and if the PLU begins with 8, the product is GMO. In the 3-4 years I have known to do this, I have never seen a PLU beginning with an 8. Heres an example just in case; 4060 = broccoli, 94060 = organic broccoli, 84060 = GMO broccoli. Again just an example, Ive never seen GMO broccoli. A mnemonic my mom came up with is 8 is evil, 9 is nice.

Mmmm

Alright that's it for today.

-AR

Home Food

"Most lawns are purely cosmetic in function. Thus, affluent societies have, all unnoticed, developed an agriculture which produces a polluted waste product, in the presence of famine and erosion elsewhere, and the threat of water shortages at home"-Bill Mollison

Pretty handy book if your in to gardening or self sustainablility...

My current night stand read is Introduction to Permaculture by Bill Mollison. Mollison is credited as being the founder of Permaculture, which essentially focuses on establishing sustainable cultures through sustainable food production, urban design,even efficient use of city refuse (humanure) and so forth. I first heard about Mollison while reading some of Joel Salatin's work. The past couple of years I have been reading gardening books and putting my skills to the test, but permaculture is the equivalent to putting your garden on steroids.* The point of this post is that it is spring time and therefore time to start getting seeds ready or at least planning your garden. Even a couple of symbolic tomato plants on the patio hepls. Here is a photo of some plant's from my garden last year.

The Brassica gang holding down fort.

In any case, I would reccomend the book and the practices it espouses to just about anyone. Whether you are interested in good health or the environment, self subsistence, or even saving a buck; growing your own food is a good idea. Personally, I do it for all of the above. Growing your own food is great supplemental exercise for the fitness enthusiast and probably adequate for the lay person if they take an old school approach and minimize the use power tools. On top of that, you can't beat fresh food. No matter what "diet" one follows, low carb, paleo, vegan/vegetarien, etc. All of these diets tend to include some plant matter unles your trying to get your Vilhjalmur Stefansson on (see bio). 

This is proof that mowing the lawn is much less cool in contrast to gardening.

Current events taking place in the world further validate the need for at least the supplemental production of local food. Not to start any debates on the merits of the globalized food production system, but the current situations in Japan and the middle east  illustrate this point quite well. For example, imagine if nuclear fallout indeed did make its way over to California soil. California is the number one food producing state in our country (1). According to a California tourist site, which I will be the first to admit may not be the most credible source, California produces over half the nations fruit, vegetable, and nut products, along with being a major dairy producer (2). Personally I know a majority of the produce I have eaten since late December has come via California.

Our food is often times more traveled than we are.

Certain foods are also highly specialized in only one or two parts of the country leaving the entire crop production highly vulnerable to disease or natural disaster. For example a majority of the worlds corn is grown in the midwest and Brazil. An article released from University of California-Davis also reports that 60 perccent of the nations apples come from Washington state alone (3). With that in mind, I understand that we can't live in fear of hypothetical situations, but it is probably prudent for the country not to put all of its eggs (and other foods) in one basket. A little bit of effort by surburanites and even city dwellers could really help to fortify our food base as well as increase the general nutrition of the food we eat.**

Think about how much food could be produced in suburban yards as well as the gas from lawn mowers that could saved or reallocated, and nitrogen run off from all the turf builder/fertilizer applied. We would also drastically cut down on food mileage. According to a report form the Leopold Center for Sustainable Agriculture at Iowa State University, its takes about 250 Calories to produce a typical pound of pears or apples once all fuel input is taken into account (4). According to nutritiondata.com, a pound of apple only provided about 250 Calories itself (see here). In my current city, Chicago, it takes an average of 1518 miles traveled to put produce on the table (4). In Michael Pollan's The Omnivores Dilemma, it is written that it takes roughly 10 Calories to produce every 1 Calorie provided in typical California grown lettuce.


I am trying to further develop my food production adroitness this year by starting all my plants from seed, but it really can be as simple as buying a few plants from Lowes or Home Depot and plopping them in the ground, followed by an occasional watering and weeding. It really comes back to the situation being a win-win. We can have people reconnected with their food, use millions of acres of "lawn" to grow food rather than practice indentured servitude to grass. There are obviously  flaws in the current system of food production, and getting out and growing a little of your own certainly wouldn't hurt.

Mixing up some of my seed starting mix...home made compost, potting soil & vermiculture

 * Just to be clear in "gardening on steroids" comment I mean Permaculture is a step up in terms of sustainability and production. I am not referring to use of synthetic fertilizers or using pesticides.

**Analytical studies show that certain processing techniques and the travel/aging of foods can cause nutrient loss in the form of vitamin and phytochemical loss (5, 6).

Pig Business!

About a year ago, I met a women by the name of Barbara Sha Cox. I had read an article featuring Barbara earlier in the week profiling her work as the founder of the advocacy group Indiana CAFO Watch (see here) Anyways the article discussed the environmental and societal problems evoked by CAFOs (concentrated animal feeding operation) in Indiana. Ever since meeting her, I have stayed in touch and tried to do my small part (writing legislatures, signing petitions, etc.) to keep CAFOs and CAFO waste out of my home state. CAFOs basically produce inferior quality meat, the animals are treated terribly, they put small family farms out of business, and the concentrated waste produced in CAFOs damage local ecosystems and makes locations virtually unlivable due to the pollution and smell.

The first I had heard of CAFOs was a 2007 Rolling Stone article entitled Boss Hog (here). I immediately stopped eating commercial pork. Since then other sources that I heave read or watched include Omnivores Dilema, Fast Food Nation, Food Inc, The Future of Food, and others. For anyone interested, Barbara just sent me the link to a new UK documentary Pig Business discussing how Smith Field Farms, the number one pork producer in the U.S. has moved over to Poland to break a foothold in the european market. The movie features Rick Dove, a speaker at the last Indiana CAFO Watch conference, and does a great job of showing the myriad reasons why CAFOs are not an optimal means to produce meat. The official Pig Business website cane be here.

Check out the documentary...