Way back in 1992, they tested polyester as a male contraceptive, and guess what?
It was 100% effective.
Fourteen men wore a polyester ‘sling’ around their prized jewels (similar to men wearing polyester underwear) and after an average of 139 days, all 14 men were found to be azoospermic. (In plain English, that means zero sperm. Zilch, Nada. No chance of making babies).
There was also degeneration noted in the tubules. It took approximately 150 days for them to regain fertility, after ceasing to wear the sling.
Polyester (polyethylene terephthalate) belongs to a class of chemicals (phthalates) that are known endocrine-disrupting, in particular, they disrupt testosterone production.
Similar studies were conducted on dogs, with similar results, and showed that polyester decreased testosterone levels.
Another study divided men onto groups wearing different textile underwear. Over the course of 12mths, men wearing polyester underwear had less and less intercourse (they became increasingly impotent/less interested in sex, although the effect was reversible after ceasing to wear polyester underwear).
A similar study on mice found that polyester underwear (however did they wrestle mice into miniature underwear? 😅) decreased their potency by a whopping 87%.
Mens testosterone levels have tanked by more than half, in the past few decades, and one need only look around to see that has vast (and perplexing) implications for society.
If you want to #bringbackalphamales ditch the synthetic clothing and bedding, ditch the synthetic perfumes and fragrances (found in nearly all big-brand personal care products, deodorants, detergents, etc) is a great place to start.
Given the ubiquitous nature of polyester and other phthalates in the environment, we cannot eliminate exposure, but we can reduce it. Making sure our diet has adequate zinc is one way to protect the reproductive system from endocrine disruptors.