A 2014 study published in Evidence Based Complimentary and Alternative Medicine tested whether or not deer antler extract would have an effect on fatigue in mice who were led to swim distances. The findings suggested that deer antler “might increase the muscle strength through the upregulation of genes responsible for muscle contraction and consequently exhibited the anti-fatigue effect in mice.” Deer antler seems to have a positive effect on genes involved in nine different signaling pathways that affect muscles, endurance and fatigue. These include GnRH signaling pathway and insulin signaling pathways, in addition to levels of troponins. (8) Deer antler may contribute to increases in muscle strength by increasing Tpm2 expression. This affects how muscles take up proteins and repair themselves. Other studies show some evidence that deer antler extract helps prevent muscle fatigue by activating the lactate dehydrogenase activities and reducing the levels of blood lactic acid and serum urea nitrogen.
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As men and women get older, they naturally start producing less Human Growth Hormone (HGH). So levels of IGF-1 also decline with age. The liver produces IGF-1 when HGH is released.  HGH is converted to IGF-1. Aside from someone’s age, IGF-1 levels will vary depending on a person’s sex (men generally have more), level of activity, their diet, genetics and lifestyle.
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.
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.
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