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Another study showed an improvement in TAC, but selenium supplementation showed no significant effects on total testosterone levels or body mass index (BMI)

16s rRNA sequencing on fecal pellets DNA from fecal pellets was extracted using a Quick -DNA Fecal/Soil Microbe DNA Miniprep Kit (Zymo Research, #D6010) according to the manufacturers instructions

Traffic 18(11):720-32 2017 PMC5650531 Hogan MF, Hull RL

Most of the studies use between 1-3 grams of L-carnitine
