I am sure we will want to discover the truth and go buy he easy to read and well cited book to make your own study. She has a earned a PhD in nutrition. Written 500 articles, been on talk radio, on TV, in Time Magazine, Prevention Magazine and written up in the New York Times a couple times. Okay sure, so what did her book say? This is where it starts to get good...
First, the following disclaimer: Products that are sold as supplements (as opposed to medications) are not regulated by the Food and Drug Administration so they are not tested for safety, efficacy or standardization.  In other words, when you buy a supplement, there is no guarantee that what is in the bottle has been tested to see if it even contains the ingredient in question, let alone whether the ingredient actually does what it claims to.  (That’s not a value judgment, just the facts.)
Chondroitin sulfate is a compound of connective tissues that are usually found in cartilage. Glucosamine sulfate is a natural building block for the growth and maintenance of healthy cartilage. Since osteoarthritis is caused by the deterioration of the cartilage in the bone joints, a daily supplement of deer antler velvet can help to stimulate the repair of deteriorated bone cartilage with healthy doses of chondroitin sulfate and glucosamine sulfate.
Velvet antler has been used in traditional Chinese medicine (TCM) that classifies many similar substances from a variety of species under the simplified Chinese name 鹿茸; (pinyin Lu Rong) and the commercial name Cervi Cornu Pantorichum.[citation needed] The two common species used within the TCM system are sika deer and red deer which are thought to be useful for treating yang deficiency syndromes.[6][7][8]
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. 
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.