If fatigue is severe or accompanied by shakiness, sweating, or confusion, check your blood sugar these could be signs of hypoglycemia, especially if you're also taking diabetes medications
Body composition changes take longer to become visually obvious 8+ weeks for most people
To reduce the chance of a reaction, choose a product with minimal additives and avoid using it alongside harsh actives unless advised by a professional
Acta Biomed 2019
10.1007/s00384-005-0773-y Lee KB, Pi KB, Kim EB, Rho BS, Kang SK, Lee HG, Choi YJ: Glutathione-mediated response to acid stress in the probiotic bacterium, Lactobacillus salivarius
If constipation persists beyond 12 weeks despite implementing all strategies, consider the pelvic floor evaluation discussed above and consult your healthcare provider about potential dose adjustments