If you've already drawn one dose and refrigerated the vial, you can use it for a second dose within 2448 hours maximum, but beyond that window the contamination risk outweighs any potential benefit
Senna contains compounds called sennosides, which promote the movement of matter through your digestive tract, as well as intestinal fluid accumulation, to relieve constipation ( In a high quality 28-day study, researchers gave 1 g of senna daily to people with constipation
Notably, the study observed changes in acyl-carnitine levels after 8 weeks of treatment, indicating potential metabolic responses to therapy
and if you like building your own stack, this is one of those basics that pairs well with other essentials for any student or athlete
"Effects of l-carnitine supplementation on weight loss and body composition: A systematic review and meta-analysis of 37 randomized controlled clinical trials with dose-response analysis", pubmed.ncbi.nlm.nih.gov , Retrieved 18/2/2022