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Both primary and secondary hypogonadism present with persistent low levels of testosterone, but primary hypogonadism is also associated with elevated luteinizing hormone (LH) while secondary hypogonadism may present with low or normal LH
PMC 4962419
L., & Andrs, V
They might not get enough B12 from food or oral supplements
"Stable gastric pentadecapeptide BPC 157: novel therapy in gastrointestinal tract." Curr Pharm Des
Sleep, nutrition, stress management
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