You really need B vitamins
The B vitamins are a group of eight water-soluble vitamins. They are coenzymes in a variety of metabolic processes in the body, and often work together—though each has a unique role as well. B vitamins are critical for building and repairing DNA and RNA, for producing energy, supporting mitochondrial function, and for synthesizing neurochemicals. And because they are involved in so many processes, deficiencies in B vitamins can lead to many problems. Are you getting enough B vitamins?
Vitamin B7 - Biotin
Biotin, or vitamin B7, is a key component of energy metabolism, and plays important roles in the health of your skin, brain, eyes, and genes. While deficiency is rare, marginal deficiency is probably common. Biotin is found in a variety of foods, with liver and eggs being the best sources. If you aren’t sure where you stand, checking your levels can help you sort things out.