Endocrine Disruptors
An endocrine disruptor is a compound that interferes with hormone signalling. Not by being poisonous, which is the part most people get wrong, but by resembling a hormone closely enough to occupy the place one should have occupied, or to block it.
That distinction matters, because it means the usual logic of dose does not hold as neatly here. Hormones work at vanishingly small concentrations, and the dose-response curve for some of these compounds is not a straight line.
The ones with real evidence behind them
- Bisphenols. BPA, and the replacements that arrived when BPA became unpopular. Found in can linings, thermal receipt paper and some hard plastics. Worth knowing that BPS and BPF behave similarly, so "BPA free" is less reassuring than it reads.
- Phthalates. Used to soften plastics and to make fragrance last. Present in vinyl, some food packaging, and a very large proportion of scented products.
- PFAS. The non-stick and stain-resistant family. They are called forever chemicals because they do not meaningfully break down, and they are now detectable in most people tested.
- Parabens. Preservatives in cosmetics and personal care. Weakly estrogenic, and the question is cumulative exposure across many products rather than any one of them.
- Certain pesticide residues. Organophosphates in particular, which is the main argument for washing produce and for being selective about which items you buy organic.
What is genuinely established, and what is not
Established. These compounds interact with hormone receptors. Exposure is widespread and measurable in population studies. Some accumulate. Timing of exposure matters, and pregnancy and early childhood are the periods of real concern.
Not established. That a given person's symptoms can be traced to a given exposure. That any commercial test meaningfully quantifies your personal burden in a way that changes treatment. That any supplement clears them faster.
Most of what is sold in this space depends on blurring those two lists together.
Why this intersects with midlife
During perimenopause your own hormones are already fluctuating unpredictably, and the liver is working harder to clear them. Adding compounds that compete for the same receptors and the same clearance pathways is not helpful, even if it is not the cause of how you feel.
This is a reason to reduce unnecessary exposure. It is not a reason to attribute perimenopause to plastic, and you will find plenty of content online doing exactly that.
What is actually worth changing
Ranked by effect for effort, which is not how most lists are ordered.
- Stop heating food in plastic. Heat and fat together are when migration actually happens. Glass or ceramic for reheating is the single highest value change on this page and it costs nothing.
- Buy fragrance-free where you reasonably can. "Fragrance" on a label can legally cover a long list of undisclosed ingredients, phthalates among them. This one change cuts across a lot of products at once.
- Decline the receipt. Thermal paper carries a surprisingly high surface load of bisphenols, and handling it transfers them. Small, but free.
- Reduce canned food where it is easy. Not a crusade. Dried or frozen instead of canned, where that is no extra effort.
- Ventilate. Covered properly on the exposure in your home, and it does more than most of the rest combined.
What is not worth your attention: anything marketed as a detox for these specifically, hair mineral analysis, and most of what is sold on the back of the word "chemical".
Where this genuinely matters most
- Pregnancy and trying to conceive
- Infants and young children
- Occupational exposure, which is a different scale entirely to domestic
If any of those apply, the advice is worth following properly rather than casually. For everyone else, this is risk reduction over years, not an emergency.
