Well, OK, the ice cream was a joke, but as I age I really have lost my ability to eat/drink certain foods. For example, fresh squeezed fruit juices really harm me if I try to drink more than 1 or 2 ounces. On the other hand, I can handle dairy products without any apparent problem.
Without getting into the discussion of what is and is not good to drink, my point here is that as we age, it is pretty clear to me that we lose our ability to absorb and process certain types of nutrients. As an example, it has become very clear that older people are really deficient in GLY, just based on skin collagen content (other tissues too, but these are generally less well studied). As much as anything, it might involve a decreasing ability to absorb/transport/process this nutrient.
As in the example of my friend who can not tolerate large amounts of GLY as a supplement… why should that be any different than GLY in collagenous foods?" We may be getting some insight into the fact that for this person GLY is poorly handled digestively, and it only really shows up as a problem when he tries to take a few grams in a more pure form. But for smaller amounts in food this may just be an inability to absorb/transport/process GLY that does not show up as gastrointestinal distress, but the other digestive problem persists.
Of course we could argue that taking GLY in its natural form essentially as long-chains of collagen might make it less of a problem than taking pure GLY. But I think the issue here is pointing to something I have suspected for a long time: we simply do not absorb nutrients as well as we get older. Getting them in whole foods may or may not be the answer. Sure, no supplementation to a rich whole food diet may be the answer when you are 26 years old, but maybe not so much when you are 62.
I am sure this conjures a lot of hate in some people. But growing scientific evidence does show that we really need certain things as we age that we really can no longer get just from diet alone. I am of the opinion that GLY becomes one of these as we age.
Fermented foods seem to be an important part of the answer, but I also am gravitating toward the opinion that supplementation becomes more essential for many people as they age. I am much more inclined to think this way now.
So, I would be very interested to hear if anyone knows of or has experimented with ways to improve the ability to take supplements in bulk amounts, such as several grams of GLY per day, for people who are sensitive. The main way that I know of is to take smaller amounts spaced out throughout the day. Has anyone experimented with trying to combine bulk supplements such as GLY with other foods to aid absorption? Maybe simply combining it with muscle protein or Whey protein would help?