Other side effects from too much niacin include: Itchy skin Rapid heartbeat Gout Nausea Vomiting Diarrhea Liver damage Vitamin B12 or Cobalmin Reports suggest that vitamin B12 can cause an allergic reaction, with symptoms such as: Itchy skin Hives Skin rash Tongue swelling Difficulty breathing Bloating Painful stomach Vitamin B7 or Biotin Another B vitamin that may cause an allergic reaction is vitamin B7
Scientific Opinion on the safety and efficacy of vitamin B2 (riboflavin) produced by Ashbya gossypii for all animal species based on a dossier submitted by BASF SE
The risks appear to be dose-dependent, transitory and can be minimized or avoided by initiating retinol experiments with lower doses [35, 36]
Glutathione is a powerful antioxidant naturally found in the body, composed of glutamine, glycine, and cysteine
However, most researchers who tolerate this phase find that subsequent dose increases are easier, suggesting the body develops tolerance over time
