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Frontiers Carnitine and Depression L carnitine improves polycystic ovary syndrome by increasing CYP11A1, estrogen receptor, and decreasing XNIP and VEGF expression Naunyn Schmiedeberg's Archives of Pharmacology Springer Nature Link Role of L carnitine in female infertility Reproductive Biology and Endocrinology 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. Chronic liver injury decreases levels of cerebral carnitine and acetylcarnitine in rats partly due to the downregulation of organic cation transporters OCT1 2 and OCTN2 at the blood brain barrier ScienceDirect
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