That’s B3 for nerve and dna repair if I understand correctly.

I notice a difference after eating non vegetarian food but since I also have IBS, my absorption can be a hit or miss.

A very balanced and nutrient rich diet with good sleep and exercise is the start to mental health recovery. People often forget how important all this is.

for ibs: no coffee, milk (any milk), vegetable oils, wheats, soy, or anything from USA :D and no sugar or alco then slippery elm and probiotics, d-vitamin + c-vitamin. fasting, intermediate is also helpful. add berries and yes, beef meat and lots of greens. with strict diet ibs goes better.