Muscle Builder* - Some "experts" make bold claims that it builds muscle. They compare it to synthetic anabolics that give many athletes who dope an advantage over the competition. This is folly claim that has no backing from direct research or research into other associated fields that would be relevant to deer antler spray. Only one thing will build muscle: proper resistance training. Make the right choice and get to work.*
"I have been real happy with the results. My lifting has definitely increased alot. I've gotten alot stronger. My endurance is amazing too. It's kind of had a domino effect on my workouts and my health overall. I've added almost 10 lbs. of muscle, which has been great. If you are looking for a good product to take, I highly recommend the one I came across and the one I have been using, Antler Farms®."*
Physical Vigor and Stamina: You don’t have to be an athlete to appreciate more energy and stamina. You may have long hours at the office, at home with kids, or at school, in training or partying. Without the energy you need to get through the day, nothing is fun-even the fun stuff. Unlike caffeine or energy boosting drinks which give you a temporary boost, Deer Antler Velvet changes you from the inside out, making increased vigor and stamina a part of your body’s natural response to the demands you place on it.
Deer antler, or more specifically ‘velvet antler”which refers to the soft, newly grown antler before it hardens, not just the velvet skin’has been used in Chinese medicine for 2000 years. Often prescribed as a tonic, it is reputed to boost the immune system, improve stamina and reduce swelling. It is also prescribed to promote wound healing and strengthen bones and said to be an aphrodisiac and to enhance fertility. In China, velvet antler is seen as second only to ginseng in its restorative powers.
Deer antler velvet is supposed to help you build muscle. It allegedly elevates levels of IGF-1, an important hormone that helps you pack on mass. As “side effects” you also should see improvements in strength and endurance. And some products even claim it speeds recovery, which is why it was linked to Ray Lewis who earlier suffered an apparent season-ending injury, and yet has played and performed at a high level in the playoffs.
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Repeated studies have been conducted on the interactions of Velvet Antler and hormones, and all studies have found that this supplement has failed to increase circulating hormone levels. One study found a highly variable increase in power output, which is antagonized by another study suggesting no significant increase in power. For the purposes of performance enhancement, the evidence does not currently support Velvet Antler as a supplement.
In September, 2013, the headquarters of S.W.A.T.S. was raided and ordered to be shut down by Alabama's attorney general citing "numerous serious and willful violations of Alabama’s deceptive trade practices act". Among the violations were "claims that the company made about a number of products that were unsupported by scientific research. Some of these products were marketed as 'dietary supplements.'"  The assistant Alabama attorney general "says that Deer Antler Spray is dangerous and its sellers are law-breakers." 
"Earlier this year, March and April, I purchased a total of 2 bottles of Nutronics Lab’s Starter spray. A tad bit about me: I have a Bachelors in Psychology and a PhD. in life so to speak. I do much research on many different topics, all the way down to these new (terrible research chemicals) that are starting to negatively affect our society. Yes, I am a recovering addict and work with them by the way, so I know much about the brain and it’s physiological aspects. No, I am not a doctor though.
"Unlike steroids, which are small, cholesterol-based hormones, protein-based hormones or growth factors can easily be destroyed," he wrote in an email. Cohen guesses that even if you consume high levels of IGF-1, most if not all of the substance would be destroyed after hitting the acid in our stomach and before entering the blood system, which is how compounds we ingest reach the muscles. "This is also why you have to inject insulin instead of just eating insulin pills," he added.
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In an ovalbumin sensitized mouse model, 4 weeks of Velvet Antler at 2.5-10mg total (weight of mice not given, assuming 20g this equals 125-500mg/kg or 10-40mg/kg for humans) was able to reduce total Immunoglobulin E (IgE) and Ovalbumin-specific IgE at 14, 21, and 28 days. When challenged with methacholine and subsequently having their airway power measured, it appeared that Velvet Antler exert anti-asthmatic effects in regards to allergies.
Deer Antler Velvet Spray is an extract that’s taken directly from the material that grows on the outside of the antlers of deer, elk, moose and caribou. Their website suggests its use for anyone that is looking to counter the effects of light exercise, mild muscular strain and exertion, and some arthritic conditions. In addition to providing joint support, Deer Antler Velvet Spray is said to balance hormone levels, build muscle, boost sexual performance, and improve immune function.
When antlers fall off, they leave wounds that heal quickly, without forming a scar. Researchers have found that velvet antler contains substances that encourage healing, and could be of use to humans. Of particular interest are 3 hormones known to promote growth of skin tissue: insulin-like growth factor (IGF-1), epidermal growth factor (EGF) and transforming growth factor-β1 (TGF-β1). In a recent study, an ointment made from velvet antler, containing these compounds, enhanced healing when applied to the skin of rats. IGF-1 was a hot topic in the media in the winter of 2013 when a football player, Ray Lewis, was accused of using a banned spray containing IGF-1.
Generally researchers agree that deer antler velvet protects, strengthens and restores the body's functions that are out of balance. In other words, it can act as an adaptogen on the human body, helping where it is needed. Studies suggest that deer antler velvet may have beneficial effects related to: increases in muscular development, strength and endurance; improved recovery; prevention and reduction of inflammation; improvement of sexual health; reduction in blood pressure; improvement in bone and joint health; stimulation of the immune system; and more.