However, a biotin deficiency is possible. Both Morrow and Di Vincenzo describe some of the warning signs as: Low energy levels (fatigue) Weakened hair and nails Skin rash Numbness and tingling in ...

Acrodermatifis enteropathica (zinc deficiency) and biotin deficiency syndromes appear as scaly patches and erosions on periorificial and acral skin and typically have sharp demarcations.

Signs of less significant, partial biotin deficiency include skin rashes, hair loss, and weak muscle tone. Other populations prone to biotin deficiency are pregnant people and people who drink ...