Vitamin B12: Chances are that if you aren’t having non-vegetarian food and also not eating a well-balanced diet, you may see your vitamin B12 levels dipping. However, our gut health has a lot to do with vitamin B12 levels. “Our gut releases a co-factor that’s necessary for B12 conversion. If our gut health is messed–up, then it could lead to low vitamin B12 levels too. For B12, one needs to take supplementation or fermented food or foods made with the vitamin (like nutritional yeast, or some plant milk),” says holistic and lifestyle coach, Luke Coutinho.