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.*
A study by Chen found that deer antler velvet inhibits monoamine oxidase activity in the liver and brain tissues of aged mice. Monoamine-oxidase inhibitors prevent breakdown of monoamine neurotransmitters such as norepinephrine and serotonin. Antler apparently allows these vital neurotransmitters to be available longer to the brain structure, enhancing mood.
Velvet antler in the form of deer antler spray has been at the center of multiple controversies with professional sports leagues and famous athletes allegedly using it for injury recovery and performance enhancement purposes. In mid-2011 a National Football League (NFL) player successfully sued a deer antler velvet spray manufacturer for testing positive for methyltestosterone in 2009 for a total amount of 5.4 million US dollars. In August 2011, Major League Baseball (MLB) added deer antler spray to their list of prohibited items because it contains "potentially contaminated nutritional supplements." 
A friend of mine gave me a bottle of your product about a month ago and I started taking it and, within a week, I started to feel energized at all hours of the day. In addition, as an actor I noticed an improvement in my memory. Most recently, I have seen a dramatic re-shaping of my body. I am gaining muscle mass and I have not trained or worked out in months! As a avid body builder most of my life, I noticed increased muscle mass without exercising, fat loss without dieting, higher energy levels, lower blood pressure, lower LDL cholesterol, younger and thicker skin, hair re-growth, wrinkles disappearing, sharper vision and bearing and of course increased memory retention…
In rats undergoing left coronary artery ligation, those with heart failure were given either Velvet Antler (Deer) or Captopril as active control for 4 weeks with a third group given water. No significant changes in cardiac structure was noted with either Velvet Antlers or Captopril (with the heart tissue being enlarged after heart failure) although left ventricular ejection fraction (LVEF) and fractional shortening (LVFS) appeared to be improved in both treatment groups to approximately the same degree and the increase in serum Brain Natiuretic Peptide (BNP) that occurred with heart failure was attenuated the same degree in both interventions.
(Adult) Shake well before each use. As a dietary supplement, spray 3 to 5 times under tongue as needed. Hold for 20 seconds before swallowing for best results. Caution: Do not use if outer seal is broken. Not intended for individuals under the age of 18. Consult your health care provider prior to use if you are pregnant or nursing, have a medical condition, or when taking any medication. *Contains Soy
A growing trend in western medicine is the proliferation of influences from ancient eastern medicine. Over 2,000 years ago, the Chinese were administering deer antler velvet to treat conditions ranging from serious illnesses to lack of sexual desire. After closely examining the wide range of health benefits deer antler velvet promotes, it's no wonder why the Chinese used it as a medicine for thousands of years.