l carnitine sperm supplement L-carnitine for Motility: Boost Fertility Advanced Male Fertility Sperm Supplement
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and has the "hottest" hands in the business

Bruzzi JF, Erasmus JJ, Swisher SG , Truong M, Macapinlac H, and Munden R

Indeed, -alanine supplementation (in daily doses of 4.8 g to 6.4 g for 6 weeks) can increase muscle carnosine content in healthy adults [103, 104]

doi: 10.1124/jpet.108.149807, 104

Yes, it boosts blood flow to the uterus, which helps thicken the endometrium, creating a more supportive environment for embryo implantation

Advances in Nutrition, 13 (4), 1243-1266
