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Effects of l carnitine Administration on Sperm and Sex Hormone Levels in a Male Wistar Rat Reproductive System Injury Model in a High Altitude Hypobaric Hypoxic Environment Reproductive Sciences Springer Nature Link What if more testosterone isn't the answer? One human study found that L carnitine increased androgen receptor content in skeletal muscle by approximately 15% after just 21 days. Interestingly, testosterone levels didn't increase. Role of carnitine in disease Nutrition & Metabolism Springer Nature Link L Carnitine and Male Fertility: Is Supplementation Beneficial? PMC
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