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." 
According to modern research, deer antler velvet has shown gonadotropic activity. Studies by both Fisher and Wang indicate that deer antler velvet may increase testosterone levels in men and can help prevent some conditions associated with aging. The estrogen hormone most affected by deer antler velvet is estradiol. Estradiol is a precursor to testosterone.
Since I’ve been taking your IGF-1 product, I’ve been able to shadow box up to 30 minutes a day. Your product has helped me tremendously even at my age. I haven’t felt this good in years. My energy, stamina and mobility are back. I wish I had this product back in the day. I would recommend the IGF-1 100,000 Maximum to anyone, whether they are an athlete or not. IGF-1 is unbelievable! It is a real championship product. Hope to see you soon.
Immortal Antler Velvet Gold is the Mercedes of antler velvet extracts. It is the only all-natural 43:1 extract that contains a powerful blend of growth factors in a naturally occurring matrix. These naturally occurring growth factors are involved in every cellular function in the human body, from metabolism to immune response. Immortal Antler Velvet Gold is the only all-natural proprietary matrix to deliver up to 100 mcg’s of IGF-1 per bottle, in addition to the full growth factor matrix. Delivering a full range of growth factors at an alarming 43:1 ratio means there is no stronger formula on the market today. This ratio means it requires 43 lbs of velvet antler tips to create 1 lb of this complete formula. It is extracted in organic grape alcohol and bottled in miron violet glass for maximum absorption and effectiveness.
In a randomized, placebo controlled test in 2004, researchers at the University of Alberta, Canada, placed 18 males from the Edmonton Police Force into a 9 week strength training program. The results showed that deer antler velvet increased the strength and endurance of the subjects relative to the control group. The researchers found that use of deer antler velvet significantly increased blood plasma testosterone levels.