THE ENERGY DIP AFTER MENOPAUSE MIGHT BE PARTLY A LIPID PROBLEM
The drop in energy that often comes with menopause gets attributed to a lot of things, most of them vague. A 2026 study in Nature Communications adds a more specific candidate, and it runs through a pathway that happens to be one of ours: methylation.
Out of all the groups they looked at, blood levels of a key mitochondrial fat fell most sharply in women after menopause.
THE FAT, AND WHY MITOCHONDRIA NEED IT
The fat is phosphatidylcholine, or PC. It is the most abundant lipid in the membranes wrapping your mitochondria, and it keeps those membranes flexible enough to fuse and hold a healthy network. Your body builds PC using SAM, the methyl donor produced by your methylation cycle, in a step run by the gene PEMT.
In the study, when PC production was blocked, mitochondria fragmented and their energy output fell. Feeding PC back, or the choline to build it, reversed that. In worms and cultured cells, not people, so treat the reversal as mechanism rather than a protocol.
THE OESTROGEN LINK
This is the part that makes the menopause signal more than a coincidence, and it needs a careful hand.
Oestrogen normally switches on PEMT, the gene that builds PC. So through your reproductive years, oestrogen keeps your internal PC-production line running. After menopause, as oestrogen falls, that internal line quietens, and the body leans more heavily on dietary choline to make up the difference. The study's finding that PC drops most in post-menopausal women fits that mechanism neatly.
What it does not do is prove that falling PC causes menopausal fatigue. The human data here is correlational. What we can say is that a pathway feeding mitochondrial energy is known to wind down after menopause, and that PC levels fall in exactly the group you would expect. That is a real, mechanistically coherent lead. It is not a diagnosis, and it is not the only thing happening in menopause.
WHERE THE INDIVIDUAL PART COMES IN
Not every woman relies on that oestrogen-driven PC line to the same degree, because PEMT itself varies from person to person. Some carry variants that make them more dependent on dietary choline even before menopause, which is exactly when the internal supply drops away. Layer that on top of the methylation cycle upstream, where the folate and B12 genes (MTHFR as one checkpoint, with MTR and MTRR) set how much methyl currency is available, and you get real differences in how hard this transition hits one woman versus another.
A standard panel will not show you any of this. It reads whether you are in the population range, not how your own PC-building and methylation genes are set up for the years after menopause.
A WORD ON CHOLINE
The obvious response is to reach for choline, and the logic is not wrong, since it is the dietary route to PC. But choline is also converted by gut bacteria into a compound with its own cardiovascular-risk questions, so this is not a green light to load up. The point is not a supplement to take. It is that whether you personally need more dietary choline is partly a genetic question, and one worth answering rather than guessing.
If you want to understand how your own methylation genes are set up, that is exactly what the genetic panel is built to read.
Share:
YOUR MITOCHONDRIA ARE WRAPPED IN A FAT THAT GETS HARDER TO MAKE WITH AGE
YOUR BODY DOES NOT HAVE ONE AGE (IT HAS DOZENS)