As this supplement is derived from 'deer', the two most commonly used species of deer in mainland China include the Sika deer Cervus nippon Temminck and Red Deer Cervus elaphus Linnaeus; these species may be relevant. 'Farming' of deers for antlers includes raising deer and sawing off the antlers under analgesia, the annual yeild appears to be 120-150 tonnes and deer are not usually killed as antlers are capable of full regeneration.
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Reports claim deer antler helped Ray Lewis overcome his recent triceps tear, and Vijay Singh has admitted to using a spray supplement. University of Alabama football players also allegedly used deer antler sprays leading up to the 2013 BCS National Title Game. Whether or not those reports are true, one thing is certain: There’s not much proof that deer antler is a performance enhancer or a miraculous healer.
The appropriate dose of deer velvet depends on several factors such as the user's age, health, and several other conditions. At this time there is not enough scientific information to determine an appropriate range of doses for deer velvet. Keep in mind that natural products are not always necessarily safe and dosages can be important. Be sure to follow relevant directions on product labels and consult your pharmacist or physician or other healthcare professional before using.
Deer antler velvet can play a pivotal role in helping to not only relieve the symptoms of diseases that affect joints, such as osteoarthritis, they can possibly eliminate them entirely. The way it may do this is through the introduction of chondroitin sulfate and glucosamine sulfate into the body. Both of these compounds are abundant in deer antler velvet.
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." 
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.