The IGF-1 found in deer antler spray is derived from deer antler velvet, the tissue found inside the deer's antlers before they fully harden. Since deer antlers grow incredibly fast, it is not surprising that the horns are rich in IGF-1. This is a naturally-occurring form of IGF-1, meaning it is not made in a lab. As a result, deer antler velvet is considered a dietary supplement by the Food and Drug Administration, and unlike synthesized drugs, the product does have to be proven safe or effective before it's sold to the public.
On January 30, 2013, Vijay Singh professional PGA Tour golfer was caught unaware and openly admitted to the personal use of deer antler spray which contained a banned substance at the time. A week later the World Anti-Doping Agency (WADA) lifted the ban on deer antler spray, but with urgency, "Deer Antler Velvet Spray may contain IGF-1 and WADA recommends therefore that athletes be extremely vigilant with this supplement because it could lead to a positive test."  The consensus opinion of leading endocrinologists concerning any purported claims and benefits "is simply that there is far too little of the substance in even the purest forms of the spray to make any difference,"  and "there is no medically valid way to deliver IGF-1 orally or in a spray." 
Performance - Borrowing the scientific research, its mandatory use by the Soviets has shown increased blood circulatory benefits, liver protective attributes and nerve strengthening effects of the aqueous alcohol extract.* This means it increases nervous innervation, easily known as the contractile capacity of muscle groups.* This leads to short burst style athletic performance increases found in weightlifting, bodybuilding, and similar sports.*
"This mountain bike loop that I do almost everyday usually takes 48-50 minutes. After a few weeks of Antler Farms®, I saw that number continually go down. I am at basically an average of 4 minutes shaven off every time that I do that loop. Faster recovery also. I have more energy later on in the afternoon. Just all around really good results. Good stuff. Highly recommend it."*
Deer antler velvet may help to increase macrophage activity. Macrophages are a type of white blood cell (immunity cell) that digests cellular debris, foreign substances, cancer cells, and other microorganisms. Macrophages help to stimulate defense mechanisms in the body by recruiting immune cells such as lymphocytes. With this increased number of white blood cells, your immunity system becomes strengthened and will have a better chance at fighting off a sickness or infection.
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Bottom line: Rogol says it’s “extremely unlikely” that deer antler in any form could offer athletes a boost. “Deer antlers do contain growth factors,” he explains. But it’s a huge leap of faith to talk about an extract doing anything beneficial for human beings, whether it’s slowing aging, developing muscle, or repairing tendons, he adds. Opinions like Rogol’s are one reason the FDA and anti-doping agencies haven’t yet taken steps to ban deer antler products that contain IGF-1.
I took red mountain deer velvet and it really messed my stomach up. I now have cramps and bloating all the time plus it feels like my stomach shrank…I can’t eat like I used to. It was a big mistake to take that stuff. Do you know of any way I can get my stomach back to normal??? Can you recommend someone who knows a lot about deer velvet?? I have been suffering terribly since I took that junk…it’s been about 2 years now!!!! My stomach has never been the same since I took that poison!!