It is complete garbage and a scam. Do you really believe they kill deer, dig deep into the antlers and extract some potent IGF-1 like growth factors that come not only com out of the deers antlers, but also are bioavailable? And somehow by spraying it under your tounge is going to increase your IGF-1 levels? I dont believe you will find orally active IGF-1 inside the antlers of a deer. I call bullshit. Mainly because you can buy it on bodybuilding.com for $15. The deer used to make that spray cost far more than that. The company would be better off selling deer meat.