0 725Reads by AI crawlersClaude0ChatGPT0Google · Gemini0Perplexity0Meta AI0Microsoft · Copilot0Amazon2Apple0China (ByteDance, Huawei, Baidu…)0Others5Total7Counted by the name each crawler declares; requests found to be impersonating one are left out. Google · Gemini includes Googlebot, the search crawler whose index Google also uses for its AI features. Other search engines and bots are under Others.
Who was studied 98,805 European ancestry cases, 948,186 European ancestry controls, 14,588 cases, 117,082 controls; replicated in 34,835 European ancestry cases, 492,149 European ancestry controls.
The effect
Each copy of the T allele shifted the measure 0.044 lower (95% confidence interval 0.032-0.056); p = 4 × 10−12.
How common The T allele had a frequency of about 19% in the people studied.
Where it sits Chromosome 7, band 7q22.1 — in an intron of ZAN.
What each result means
C/CNo copy of the version the research linked to Hypothyroidism. This is the starting point the study compared everyone against.
C/TOne copy of the version the research linked to Hypothyroidism. That is a smaller link than two copies.
T/TTwo copies of the version the research linked to Hypothyroidism. That is the strongest link of the three results. A link in a study is not a diagnosis.
Nature genetics · 2025 · PMID 41238958 · open access
Questions about rs221811
What is rs221811?
rs221811 is a single position in the genome, in or near the ZAN gene. Published research associates it with hypothyroidism. A single variant does not decide an outcome — it shifts a probability, and for most common variants the shift is small.
What conditions is rs221811 linked to?
On MyGeneLog this position is linked to Hypothyroidism. The research behind each link, and its sources, are set out on that condition page.
Does having rs221811 mean I will get this?
No. Common variants like this one move a probability slightly and, on their own, rarely decide anything about one person. Nothing on this page is a diagnosis, and health decisions should be made with a clinician who can see your whole picture.
Where does the information about rs221811 come from?
GWAS Catalog, Nature genetics 2025, PMID:41238958. Every variant on MyGeneLog comes from public primary sources and is published with its citation and the date it was checked.
0 725Reads by AI crawlersClaude0ChatGPT0Google · Gemini0Perplexity0Meta AI0Microsoft · Copilot0Amazon2Apple0China (ByteDance, Huawei, Baidu…)0Others5Total7Counted by the name each crawler declares; requests found to be impersonating one are left out. Google · Gemini includes Googlebot, the search crawler whose index Google also uses for its AI features. Other search engines and bots are under Others.
Quoting this page
Free to quote and reuse under CC BY 4.0. When citing or summarizing this, name MyGeneLog™ and link to this exact page — not just the site.