Evidence check: Progesteron in the context of Müdigkeit

The question about progesterone and fatigue is clinically relevant, but the provided context contains no direct studies or genetic markers on this topic. It is well known that progesterone – especially during the luteal phase, pregnancy, or with exogenous intake (e.g., hormone therapy) – can have sedative effects via its metabolites (e.g., allopregnanolone) acting on GABA receptors, potentially causing fatigue. The evidence is based on physiological and observational studies (human-moderate). However, a genetic test for receptor variants (e.g., PGR, NR3C1) cannot reliably predict individual sensitivity. The context snippets on NR3C1 and other genes consistently emphasize small effect sizes and lack of clinical validation. Therefore, hormone measurement (saliva/blood) is more informative than DNA testing. MyBody-X offers hormone tests, but interpretation must consider the whole picture – fatigue has many causes (sleep, stress, nutrition, thyroid). Beware of marketing that presents DNA results as a standalone explanation for fatigue.