Sulcuscentralis
Member
- Joined
- Apr 24, 2017
- Messages
- 625
I used to get a headache from Vitamin A, anything over 10K IU/day. After taking supplemental copper, the problem disappeared. I even tested it with several days of 50-75 K IU in a row, and had no headache.
I'm pretty sure most people who have trouble with Vitamin A are missing something, but they may not find the answer in pubmed if it's obscure or undocumented.
It reminds me of a recent paper on the hepatoxicity of EGCG finding that it was caused by copper deficiency. It might have been the missing thing for all those people with documented cases of hepatoxicity from EGCG supplements. But prior to that paper, the reason was unknown.
Makes more sense to eat liver instead of supplements.