d-Biotin is found primarily in protein sources such as egg yolks, meat, milk, poultry, fish, soybeans and whole grains.  

Kirkman’s d-Biotin is a hypoallergenic formulation, designed specially for individuals with special dietary requirements and sensitivities.  Vegetable capsules rather than capsules made from animal gelatin are used to minimize allergens. This product does not contain fillers, flavors, preservatives or common formulating aids that could cause sensitivity or allergic reactions.  It is is free of casein, gluten, soy, flavors, colors, animal derivatives, sugar, heavy metals, pesticides and other environmental impurities.