• Amino - The building blocks of protein in all animals and plants.
• Cysteine - An amino acid found in the hair protein keratin.

• Gluten - Gluten is a general name for the proteins found in different forms of wheat.
• Eggs - May contain gluten if used as an ingredient. Some foods add wheat based batter to eggs.

• Calcium - May be animal based. Double check the label to be sure of the origin.
• Retinol - Vitamin A obtained from vegetables, egg yolks, or fish liver oil.

• Wheat - Wheat includes gluten. Check the ingredients if gluten-free is not on the label.
• Spelt - An ancient strain of wheat and contains gluten levels similar to modern day wheat.
• Rye - Often contains gluten. Check the ingredients if gluten-free is not on the label.
• Barley - Often contains a form of grain gluten. Check the ingredients if gluten-free is not on the label.
• Malt - Many malted products contains gluten. Check the ingredients if gluten-free is not on the label.
• Gluten - Gluten is a general name for the proteins found in different forms of wheat.
• Chips - Some potato chip seasonings may contain malt vinegar or wheat starch.