Stop using plastic
Bisphenol A (or BPA) is a monomer commonly found in plastic goods—water bottles, Tupperware, that sort of thing. BPA is bad for your body for a variety of reasons, but it can affect your thyroid health as well. A study published in The Journal of Clinical Endocrinology & Metabolism has found links with this chemical negatively affecting your thyroid. If you’re still regularly using plastic containers or bottles, switch to glass versions.
Avoid green tea
Experts found that links between green tea consumption and an exacerbation of pre-existing thyroid problems. However, there is no evidence of those issues from black tea consumption. So, if you’re a regular tea drinker, switch to black—or, if you don’t need the caffeine, stick to herbal blends.