Bests & Worsts Reviews from Amazon

After taking it for a week I found myself feeling quite depressed. I’m somewhat prone to anxiety and depression although not on any meds for them. I looked depression up as a possible side effect and sure enough there were articles that said collagen “may” reduce serotonin levels. Never took again and felt better about a week later. This is purely a guess, anecdotal, but it’s a concern. Just my opinion.