Why Male and Female Mitochondria Aren't the Same

This review makes a case that is easy to overlook: mitochondria themselves are shaped differently by biological sex, not just the diseases that affect them. The authors synthesise current evidence that oestrogen, testosterone and progesterone each modulate distinct aspects of mitochondrial function, including how mitochondria form, how efficiently they produce energy, how they manage oxidative stress, and their internal quality-control processes. These hormone-driven differences produce genuinely distinct mitochondrial phenotypes between women and men that may help explain differing disease patterns across the lifespan. The review specifically examines major hormonal transitions, pregnancy, the postpartum period, menopause, and conditions like polycystic ovary syndrome, tracing how each reshapes mitochondrial and immune signalling together. As a narrative synthesis rather than new experimental data, its contribution is in organising a scattered evidence base into one coherent picture rather than settling open questions. For a brand built on taking women's biology seriously on its own terms, this is a useful, current piece of the scientific foundation showing that female mitochondrial biology is not simply male biology with hormones subtracted.