<<Disclaimer: Verify this information before applying it to your situation.>> Could any one explain what is crystalline ascorbic acid and Rose Hips Powder. I bought GNC Vitamin C crystals but cannot get an answer from G.N.C. where it's gluten and casein free. ( it says no sugar, no starch, no artifical colors or flavors, no preservatives) I would like to cook with this for my 4 yrs old who is on g/f and c/f, yeast free diet. Thank you.