IGF-1 is currently on the World Anti-Doping Agency’s prohibited list due to how it gives athletes an unfair advantage in terms of building strength and muscle mass. (7) However, it’s still legal to use supplements that may provide IGF-1 or similar effects. Most of the studies that show positive results from using deer antler supplements have used high doses. And some have tested the product on animals (mice or rats) rather than humans.
Both a lack of sexual desire and sexual performance issues like erectile dysfunction can be traced back to a low testosterone level. Deer antler velvet can help increase the production of hormones related to sexual functions, including testosterone and its metabolites. In this way, deer antler velvet can help as not only an aphrodisiac but also as a possible treatment for erectile dysfunction.

Indeed, within weeks you may begin to notice less extra weight around the waist and a firmer belly  (a.k.a. a smaller "spare-tire").* We tell them, "That is because your hormones are working better and why you are looking and feeling better from all that hard work exercising." We get a spare-tire because our body gets tired, Your new thing to do with your nutrition and fitness program will remove that spare-tire and replace it with a lean and solid waist that you and others can be proud of.
"I have been real happy with the results. My lifting has definitely increased alot. I've gotten alot stronger. My endurance is amazing too. It's kind of had a domino effect on my workouts and my health overall. I've added almost 10 lbs. of muscle, which has been great. If you are looking for a good product to take, I highly recommend the one I came across and the one I have been using, Antler Farms®."*

Unfortunately, the potential problems with IGF would seem to negate any of these theoretical benefits.  It has been shown that improper use of hormones such as dehydroepiandrosterone (DHEA), androstenedione, and human growth hormone may increase the risk for development of prostate cancer or promote the growth of existing prostate cancer by raising IGF-1 levels.  Therefore, men who are taking supplements with IGF in it (or those that raise IGF levels) could theoretically be putting themselves at an increased risk for prostate cancer.  Again, it hasn’t been rigorously studied so it’s impossible to know for sure, but if you have any risk factors for prostate cancer, it’s probably best to avoid taking this supplement.  
No direct reports of chronic wasting disease (CWD) related to deer velvet supplementation have been published. However, several Web sites contain disclaimers mentioning the possibility of the disease being present in antler products. The CDC has not yet found a relationship between CWD and any neurological disease that affects humans with deer velvet use.
I never take a product without doing my research, because it is always good to know what you're putting in your body. I looked at several sources including scholarly journals about many of the ingredients in Deer Antler IGF-1. It is a great product, and has been proven to work without ANY side effects. This product has definitely been helping with my lean muscle gains during my improvement season. It gives me energy before a workout, and it gives me some great vascularity while I'm lifting!
Deer antler velvet's effects on cell growth and repair have been investigated in several areas. Deer antler velvet may be a natural source of hormones for those seeking aid to muscle growth and development. Research has identified various growth factors in deer antler velvet including IGF-1 (insulin–like Growth Factor-1), IGF-2 (insulin–like Growth Factor-2), and EGF (Epidermal Growth Factor).
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