IGF-1 (Insulin-like Growth Factor-1) by NOW Foods and available at Supplementstogo.com is a polypeptide compound produced from HGH (Human Growth Hormone). DetailsServing Size: 2 sprays (0.32ml)Suggested Use: Shake well before using. As a dietary supplement, spray 2 times daily in mouth, hold momentarily and then swallow. Consume 2 to 3 times daily as needed.Free of: yeast, gluten, wheat, corn, milk, egg.Other Ingredients: Purified water, Natural Lemon Flavor WONF, xylitol, citric acid, lecithin, potasium sorbate (as preservative).Warnings: NoneDisclaimers: None* “ng” is the acronym of nanograms (1 billionth of a gram).LipoSpray® is a registered trademark of BioZone Laboratories, Inc.