Is 310 Biotin Melt gluten-free? Anah July 02, 2018 15:46 Updated Follow Yes, our 310 Biotin Melt is gluten-free. Related articles Do 310 Digestive Enzymes contain gluten, dairy, wheat or any other common allergens? What is Biotin and how can it help me? Are 310 Juice gluten-free? Can I drink 310 Shake if I'm pregnant? What about if I'm nursing? Comments 0 comments Please sign in to leave a comment.