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In addition, taking a combination of acetyl-L-carnitine, L-carnitine, L-arginine, and Panax ginseng seems to increase sperm movement in men with infertility due to reduced sperm movement
Some use it to support natural testosterone production
Excessive IGF-1 carries long-term risks including potential promotion of existing cancerous cells
69 RubboH.RadiR.TrujilloM.TelleriR.KalyanaramanB.BarnesS.et al (1994b)
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