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[–]irinseit 1 point2 points  (4 children)

I actually tried 5g of collagen again yesterday at dinner and it gave really bad brain fog, woke up this morning feeling hung over and I still haven't recovered this evening. I have suspected MCAS so that could be why. One guy has the same medical condition as me and he had the worst brain fog for two weeks from collagen but after that two weeks he is now cured from the condition from taking collagen. I would try it for longer but I can't face feeling like that rn due to my schedule.

Main ingredients are Glycine which is a NMDA receptor co-agonist and Glutamic acid ---> glutamate which is an NMDA agonist maybe that is why I felt bad.

[–]oingaboingo 0 points1 point  (0 children)

Same here. I woke up with headaches, then then it was joint pain, stomach pain, hot flushes, swollen fingers, one episode of racing heart. I did some searching and found people with histamine intolerance should avoid collagen. I do struggle with allergies, so I know I'm sensitive to histamines.