Type 4 Waardenburg syndrome (also called Waardenburg-Shah syndrome) is characterized by symptoms of Hirschsprung's disease in addition to the classic features of hearing loss and pigmentation abnormalities.
[Effects of a vitamin B complex on functional recovery after nerve injury (author's transl)]. Hasegawa K, Mikuni N, Sakai Y. Functional recovery after nerve crushing was investigated in the following manner: Under pentobarbital anesthesia the sciatic nerve of the rat was crushed at the level of the hip (proximal crush) or the thigh (distal crush).
B-7 (biotin) is used in sugar metabolism and used clinically to improve the health of hair. Doctors might recommend a B complex to help boost energy, help with depression and even help with sugar cravings. It is not a far stretch to assume B vitamins could help us feel better since they are needed for so many functions in the body. At times, one member of the B family may be more important than others. B-3 for cholesterol is one example.