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Question The book, "Practically Macrobiotic," by Keith Mitchell, claims
that many types of legumes (soybeans, chick peas, peas, lentils, alfalfa) should
never be eaten raw, because they contain something called a "trypsin inhibitor"
that can interfere with the digestion of protein, and the assimilation of the
amino acid methionine. This is confusing, as many raw fooders regularly eat raw
sprouted legumes. Please comment/explain.
Short
answer The named (raw) seeds do contain a number of anti-nutritive factors,
which include enzyme inhibitors such as trypsin inhibitor. However, the levels
of these anti-nutritive factors (with a few exceptions) decrease sharply when
seeds are soaked and sprouted. Whether the small amount that remains after sprouting
is of concern, is the point people disagree on. One anti-nutritive factor that
actually increases is saponin in alfalfa, which peaks at 7-8 days, the time when
most people eat them.
Long
answer A long answer is provided in the well-researched article: Warren
Peary and William Peavy, "Natural Toxins in Sprouted Seeds: Separating Myth
from Reality", in "Vegetarian Journal", vol 14, #4, July/August
1995, pgs. 17-20.
The
above article specifies references for each of the seeds listed above. However,
the coverage of saponin in the article is, in my opinion, too brief and not clear
enough.
The
above answers do not address important questions concerning sprouted legumes:
1)Taste: soybean sprouts and nearly all the large beans, taste incredibly
bad when raw. The flavor is so bad you would not, and could not, eat them. Indeed,
the usual reaction to trying to eat them is to spit them out. Any who doubt this
are invited to prove it to themselves by soaking and sprouting such seeds for
a day or two. Given that the taste when raw is so bad, that cooking is actually
necessary (cooking destroys the enzyme inhibitors, and improves the flavor), the
presence of anti-nutrient factors in raw soybeans and other large raw beans, is
irrelevant.
2)Can you digest them? In general, not very well. Mung and adzuki beans are
the easiest legumes to digest; the rest are more difficult. Flatulence is a serious
problem with legumes. In the short run, flatulence is an inconvenience; in the
long run it may promote disease (it is a mildly toxic gas, after all).
One
way to reduce/eliminate the flatulence problem is to use mild spices to enhance/stimulate
digestion. Specifically, ginger and turmeric enhance the digestion of protein,
and cumin is anti-gas. Other mild spices can be used to stimulate digestion and
reduce gas. Garlic (a not so mild spice) also stimulates digestion, and reduces
gas.
3)How does your body react to eating sprouted legumes? Do you feel good after
a meal of sprouted legumes? Do you have gas or bloating? Do you feel heavy or
uncomfortable? The reaction of your body is the most important indicator. The
reaction of your body is more relevant than research papers on anti- nutritive
factors, or the opinions of others. Your body will tell you if the food is good
or bad for you - if you only listen.
A
closing remark. If you decide that large beans and/or legumes are not for you,
there are many other grains, seeds, nuts that you can sprout. I would encourage
you to experiment with sprouts of all kinds, including legumes, to determine the
sprouts you like, and which sprouts agree with you.
P.S.
sprouted mung beans are a regular part of my diet; other legumes I eat only rarely.
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