There is some evidence that deer antler spray may work for improving performance and physique. However, it seems that an individual needs to take very high doses in order for these benefits to occur. In studies where the supplement was effective, injections of very concentrated extracts were used. Injections may be the most effective, and likely the only, way that deer antler works. This is because IGF-1 is mostly destroyed when it passes through the digestive system. Because of this, swallowing deer antler supplements would practically be useless.
Deer antler velvet's effects on cell growth and repair have been investigated in several areas. Deer antler velvet may be a natural source of hormones for those seeking aid to muscle growth and development. Research has identified various growth factors in deer antler velvet including IGF-1 (insulin–like Growth Factor-1), IGF-2 (insulin–like Growth Factor-2), and EGF (Epidermal Growth Factor).
Deer antler spray products are not cheap. Expect that buying a high-quality product will set you back about $60–$100 per bottle. When taken as directed, each bottle should last you about one month. You don’t need to refrigerate the spray. However, keep it away from very hot temperatures to preserve the chemical composition of the product. Manufacturers claim that you can start experiencing benefits within 3–4 days. However, results definitely differ from one person to the next.

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Velvet antler is the whole cartilaginous antler in a precalcified growth stage of the Cervidae family including the species of deer, elk, moose and caribou. Velvet antler is covered in a hairy, velvet-like "skin" known as velvet and its tines are rounded, because the antler has not calcified or finished developing. Velvet antler preparations are sold in China as part of Traditional Chinese medicine, and in the United States and some other countries as a dietary supplement.
I just wanted to let you know that April 29, 2011 I was diagnosed with ALL Leukemia. I just recently, finished my chemo therapy after a 2 year regimen. I have stayed very active though out the 2 years but the drugs were very difficult to tolerate at times. My love is Cycling, I have raced at a high level for many years. I started using the product to help me regain my strength. I have been using the Nutronics IGF-1 for 2 months and my endurance and energy have improved dramatically. I look forward to the continued use and the gains that IGF-1 provides. I appreciate your support.
Currently, one study that induced a fracture unto a rat bone and injected 20mg/kg of Velvet Antler polypeptides into the area every other day for 7 weeks noted that fracture healing rate was dose-dependently increased at weeks 4-7 relative to control and that the bone loading weight was increased following rehabilitation with 10mg/kg (60.7%) and 20mg/kg (93% more than control) after 7 weeks.[29] An in vitro study suggested that this was due to a concentration-dependent mitogenic activity on osteoblastic precursors and chondrocytes.[29]
Using deer antler velvet benefits sexual functions and libido by helping to increase gonadotropin hormones which include luteinizing hormone (LH) and follicle-stimulating hormone (FSH). Luteinizing hormone (LH) and follicle-stimulating hormone are hormones that stimulate the sex glands. The stimulation of the sex glands is pivotal for sexual reproduction. Without the presence of the gonadotropin hormones, the sexual organs will fail at their purpose and the individual will be considered infertile. As the deer antler velvet promotes an increase in LH, the LH causes the testes to produce more testosterone.
Insulin-like Growth Factor 1 (IGF-1) is an anabolic molecule which appears to induce growth of the antlers themselves,[31][32] although testosterone may be the primary growth factor.[33] Currently, there is no evidence that serum IGF-1 is increased following Velvet Antler ingestion with one study using 1.5g of Velvet Antler for 11 weeks failing to increase serum IGF-1.[26]

Deer antler velvet can act as a natural adaptogen, restoring homeostasis to an unbalanced body by helping where it is needed. Deer antler velvet has an effect on many systems of the body given its complex chemical composition. The active ingredients in deer antler velvet are mostly precursors that are required by the body to process substances that maintain its health and wellbeing.

Deer antler velvet is used for its purported ability to raise testosterone levels to treat decreased libido (low sex drive), infertility, and erectile dysfunction in men.  It is used in combination with other herbs to treat sexual dysfunction and hormonal dysfunction in men and women.  It is used to treat conditions resulting from deficient kidneys.  Some people use it because of its reputed benefit as an aphrodisiac and muscle strength enhancer.  It is also sometimes prescribed to help alleviate withdrawal symptoms in the treatment of morphine addiction.  
I recently ordered IGF-1 Plus Maximum in order to gain results from my physical therapy workouts. Since using this product, I am not only able to do harder workouts, but I also have increased muscle mass. Besides these benefits I have experienced improvement in my wound healing! Areas that repeatedly break down are showing increased healing like never before. My hands, which are severely scarred, have more flexibility. I look forward to the many benefits that may come from using IGF-1. Thank you Rick Lentini!
Most of the world's supply of velvet antler comes from Sika deer, red deer and elk or wapiti, including a large deer ranching industry in New Zealand. New Zealand is the world’s largest producer of velvet, producing 450-500 tons of red deer velvet antler annually.[1] China produces 400 tons of predominantly Sika deer velvet antler annually. Russia produces 80 tons annually. United States and Canada each produce 20 tons annually.[2]
Endurance athletes have shown increases in red blood cell count and greater aerobic capacities, but this benefit takes time to ripen. More energy for you. But we need a certain amount to get real results, more on dosage below. Many receive metabolic benefits that increase overall energy and well-being. A specific group of those who supplement with our extract prefer it as a natural alternative.

Endurance athletes have shown increases in red blood cell count and greater aerobic capacities, but this benefit takes time to ripen. More energy for you. But we need a certain amount to get real results, more on dosage below. Many receive metabolic benefits that increase overall energy and well-being. A specific group of those who supplement with our extract prefer it as a natural alternative.

Aphrodisiac* - For a long time the alcohol extract has been used to strengthen reproductive organ function, but modern studies of deer antler velvet results are inconclusive concerning women and from men. Although some people do report benefit in intimacy, this may be because of the performance, blood circulation and stress adaptation effects.* So in other words, if your supplement doesn't have the alcohol extract in it don't expect the benefits of supplements made with it.*
Even sellers of deer antler products doubt that the products could deliver IGF-1. "IGF-1 is very unstable," Dean Nieves of Florida-based Bio Lab Naturals told the Baltimore Sun. "It could not exist outside of a very controlled environment." Nieves' company therefore markets the product as a nutritional supplement. "It is just packed with nutrients," he said.

Research has been conducted on the potential use of deer antler velvet for healing of wounds. In Russia (Arapov, 1969), Pantocrin was administered to patients with surgical and internal wounds. The study reported that there were a number of positive effects, including the normalization of arterial pressure, reduction in surgical complications, and becoming active quicker. In tests on rats (Wang, 1985), bone fracture repair was accelerated. A recent study by Bubenik found that antler helped heal epidermal wounds in rats. In another study by Takikawa, et al., researchers reported observing new bone formation following experimental whiplash injuries in rabbits. Pretreatment in rats reduced cell degradation and improved recovery times from extreme temperature and electric shock exposure.