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.*
But when it comes to sprays or pills, there’s little evidence that deer antler offers performance enhancing benefits of any kind, says Alan Rogol, M.D., an endocrinologist at the University of Virginia. Rogol is also part of a small team of doctors that assists anti-doping agencies in determining if and when athletes can use certain controversial substances.

One study in men given 1.5g Velvet Antler for 11 weeks noted that intake of Velvet Antler was associated with a greater improvement in peak torque (30+/-21% more than baseline vs. placebo increasing 13+/-15%) and average power (21+/-19% vs. 7+/-12%) as assessed by leg extension; the authors noted that other parameters suggestive of power improvement (such as endocrine improvements or erythropoesis) did not occur and noted that replication is needed.[26] The lack of aerobic improvement noted in this study is contrasted by another study using 2,700mg of Velvet Antler (two doses of 1,350mg daily for 10 weeks) which improved VO2 max by 9.8%, although this study had a remarkably high dropout rate of 44% which precludes conclusions that can be drawn.[27]

One study published in the Journal of Ethnopharmacology found evidence that use of deer velvet antler may help strengthen joints and bones, reducing symptoms like joint pain associated with osteoarthritis. (10) After rats with osteoarthritic symptoms were given total velvet antler polypeptides from red deer (TVAPL) for 12 weeks, they showed signs of significant reversal in osteoporosis. The researchers found improvements in the rats’ bone weight coefficient (BWC), bone mineral density (BMD), and bone mineral content (BMC). They believe these effects were due to proliferation of cartilage and osteoblast-like cells, in addition to reductions in inflammation due to inhibition of interleukin-1 (IL-1).
L-Arginine: An amino acid usually found in red meats that is important for the body’s ability to manufacture proteins. L-Arginine has been used to treat conditions like high blood pressure, congestive heart failure, blocked arteries, and erectile dysfunction. L-Arginine is safe for most people, however it should not be taken by women that are pregnant or breastfeeding.