I stumbled upon this comment by Dr.Kruse (the Quilt) in here but can't seem to locate it again. I guess it has to do with chemical interactions and absorption - can anybody comment on the specific mechanisms at play as regards Vit D, thought?
asked byLaney (55)
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on September 08, 2011
at 09:16 PM
Many common Paleo foods like nuts or spinach contain substances like phytic acid or oxalic acid, which impede the absorption of minerals. Taking a magnesium supplement on an empty stomach ensures that you get the most bang for your buck nutritionally speaking.
Also many people like to take magnesium at bedtime, as it helps them to relax. An empty stomach amplifies this effect by ensuring that the body's up-take of magnesium is faster and more concentrated - making it easier to fall asleep and to sleep deeply.
Finally, since the body produces vitamin D in response to sunlight, it has been theorised that night-time supplementation should be avoided since it disturbs the body's natural rhythms and hormonal responses. (It should also be noted that vitamin D is in fact a parathyroid hormone rather than a "vitamin".) In fact, many Paleo Hackers have anecdotally mentioned that late night vitamin D stops them from sleeping.