l carnitine chat L-CARNITINE LIQUID 3000MG which is also naturally present in the body L-Carnitine in Topical Pain Cream:

Injection site pain or discomfort

NF-B-driven suppression of FOXO3a contributes to EGFR mutation-independent gefitinib resistance

10.1016/j.beem.2013.07.004 Summary Keywords male age, sperm quality, sperm DNA fragmentation index, cumulative pregnancy outcomes, assisted reproductive technology (ART) Citation Xie H, Chen Y, Xu S, Miao N, Zheng W, Jiang C and Sun T (2025) Increasing age in men is negatively associated with sperm quality and DNA integrity but not pregnancy outcomes in assisted reproductive technology

however, sample sizes were limited, and the results require confirmation in larger studies

(11:24): Digestive issues are common and that can be diarrhea, constipation, it can be alternating diarrhea with constipation or poor appetite or bloating