Are permit ted to be made if they meet the requirements for the claims found in the applicable regulations. Some vitamins are essential in small quantities but dangerous in large quantities, notably Vitamin a. National Center for Complementary and Alternative MedicineSafety information on herbal supplements, from. Due to the large volume of products available at Supplement Direct we can not stock every item. Every effort is made to stock the best selling items and to get the non stocked items asap. Americans views on the use and regulation of dietary supplements.
Herbal medicines today and the roots of modern pharmacology.