this product is so mass advertised ,its unbeleivable". the ingredients are planta,/vegetable, origin, including various hormones, and tonics,. thought to work by increasing cell building sugars etc, have found good results with superthrive. it does have a place in the growers cabinet, and the availability of the small 15ml bottle is more the reason. SUPERTHRIVE acts in a way similar to VITA-LINK-bio pac.