IGF-1 [Structural, Immune] (insulin-like growth factor 1) is a metabolite of human growth hormone. Scientists have discovered that an extract of the velvet on the antlers of a particular species of deer (Cervi parvum cornu) provides IGF-1 and all of its benefits. IGF-1 helps restore and maintain muscle and bone mass, improves energy and endurance, promotes the growth of new tissue, supports healthy joints, boosts the immune system and supports sexual performance. Researchers have found that deer antler velvet contains eight known growth factors, prostaglandins, nerve-protective fatty acids, prohormones, amino acids and components of cartilage (including glucosamine, chondroitin sulfate, collagen type I, collagen type II and minerals). NSP IGF-1 is concentrated and cold-processed to assure optimum bioactivity. Its liposome delivery system ensures optimum absorption. NSP takes great care to harvest the deer antler velvet in the most humane and careful ways.Each bottle contains at least 2,500 nanograms of IGF-1 and other insulin-like growth factors. Spray twice under your tongue three times daily. Hold for 20 seconds before swallowing.Stock No. 966-1 (1 fl. oz. spray)