The growing market has bred plenty of competition. A company called Now Foods is now making deer antler velvet lozenges. GNC just started selling deer antler velvet capsules called New Vigor from a company called Vitalast and Amazon.com has more than 30 products will deer antler velvet in it including the raw powder from New Zealand, where the most coveted deer velvet is harvested.

According to modern research, deer antler velvet has shown gonadotropic activity. Studies by both Fisher and Wang indicate that deer antler velvet may increase testosterone levels in men and can help prevent some conditions associated with aging. The estrogen hormone most affected by deer antler velvet is estradiol. Estradiol is a precursor to testosterone.
First, the facts: Deer antler has been a popular element of Eastern medicine for centuries. And—like red meat, eggs, or milk—deer antler contains small amounts of insulin-like growth factor 1, or IGF-1, explains Oliver Catlin, president of the Banned Substances Control Group (BSCG), which tests dietary supplements for illegal performance enhancers.
When you are born, your body has massive amounts of IGF-1. This hormone helps you grow and enhances basic functions of your body. As you get older, your IGF-1 levels decrease, which can lead to less energy, decreased immune functions, and diminished health overall. IGF-1 Plus supplements can help regain some of that vitality! By helping to enhance your body's functions with this all-natural supplement, you can help boost muscle mass, help enhance your immune system, and help work towards improving your health.
Deer antler products contain mostly amino acids (that form proteins) along with growth factors, which are poly-peptide bonded amino acid chains. (4) The most abundant growth factor is IGF-1. However, it isn’t a factor found in these products. Depending on the specific brand, deer antler spray/powder/capsules may contain amino acids and growth factors including: (5)
In a randomized, placebo controlled test in 2004, researchers at the University of Alberta, Canada, placed 18 males from the Edmonton Police Force into a 9 week strength training program. The results showed that deer antler velvet increased the strength and endurance of the subjects relative to the control group. The researchers found that use of deer antler velvet significantly increased blood plasma testosterone levels. 
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