The Claim

Fluoride present in tea plants inhibits the uptake and utilization of iodine in thyroid and extra-thyroidal tissues.

Source: 1 Tablespoon Before Bed KILLS Cortisol In 2 Minutes (Dr. Bright)

What the research says

Roughly balanced

Support and challenge are close. The picture may shift as more studies come in.

Supports

1score

Challenges

0score

These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.

How it works

1 study reviewed

In plain English

Drinking tea might make it harder for your body to use iodine, which is important for your thyroid to work properly.

See the scientific wording

Fluoride in tea plants inhibits iodine uptake and utilization in thyroid and extra-thyroidal tissues.

1 study

Study: Exploring the Impacts of Fluoride-Induced Thyroid Toxicity: A Comprehensive Review
The study says fluoride — no matter where it comes from, like water or tea — can block the thyroid from using iodine, which is needed to make hormones. So even though it didn’t study tea specifically, it still supports the idea that fluoride in tea could do the same thing.

Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies

Fit Body Science verdict — we translate health claims into clear verdicts backed by peer-reviewed research.

Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.