Amadeus Schmidt wrote: >At the moment I look for annother explanation, why the intermediate energy >storage in fat is preferred over that in glycogen (some other vitamins and >Zinc come into the play). In terms of function, it makes sense to spare glucose for the brain, as you noted. Since glucose is needed for short-duration high-intensity exertion too (i.e., emergencies), this is another reason to conserve it. >I think that the not-availability of short-chain EFAS (LA,LNA) is what >would force membranes to be made from SFA/MUFA. >This would make sense to show up as dangerous, >as low-EFA food (below 20%) would be hard to find in wild food. >And wild food beeing natural for humans. I agree, except I think it is the absolute amount and not the ratio that matters. Referring back to the other post, if we need 2-10g of PUFA per day to keep membranes permeable, then the amount of SFA being used as fuel shouldn't matter. It would only be *absolute* scarcity of PUFA that would force more SFA to be incorporated in the membranes. Todd Moody [log in to unmask]