In a study of people in Brazil, those who ate more canned foods had higher levels of BPA in their urine, and those who followed a healthier diet had higher levels of BPA in their hair.
Mechanism
Synthesis from 1 study
Canned food lets BPA into your body quickly, and your body flushes it out fast through urine. But when you eat lots of healthy foods like veggies and whole grains, your body processes BPA more slowly, so it stays in your blood longer and ends up in your hair as it grows.
Most probable mechanism
When people eat food from cans, BPA leaks into the food and gets absorbed quickly through the gut, then shows up in urine because the body gets rid of it fast. But when people eat healthier foods like fruits, vegetables, and whole grains, the fiber and natural compounds in those foods slow down how fast BPA is cleared, so more of it sticks around and gets stored in hair as it grows.
Bisphenol A leaches from epoxy resin linings in canned food containers into the food matrix during storage and heating.
Absorbed BPA is rapidly metabolized in the liver through glucuronidation and excreted via urine within hours.
Dietary components in healthier diets, such as dietary fiber and polyphenols, slow gastrointestinal transit and alter hepatic enzyme activity, reducing the rate of BPA conjugation and excretion.
Unmetabolized or slowly cleared BPA circulates longer in the bloodstream, increasing its incorporation into keratinizing tissues like hair follicles during hair growth.
Evidence from Studies
Supporting (1)
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