English version in progress: interface and data are in English; some explanatory text is still in Chinese.
Selenium
硒被装进大约 25 种"硒蛋白"，其中有抗氧化酶，也有激活甲状腺激素的酶。
Full ranking Dose tool Products (3,209)
Key facts
Daily Value (US FDA)55 mcg
Tolerable Upper Intake Level (UL)400 mcg
Median（Per day）55 mcgP5 8 – P95 200
Products3,209
Sources: https://ods.od.nih.gov/factsheets/Selenium-HealthProfessional/ · FDA DV 55 mcg (https://www.fda.gov/food/nutrition-facts-label/daily-value-nutrition-and-supplement-facts-labels); pre-2016 DV [70] (https://www.federalregister.gov/documents/2016/05/27/2016-11867/food-labeling-revision-of-the-nutrition-and-supplement-facts-labels); adult UL 400 mcg; hard_high=4000 per serving (UL x10 or market maximum), hard_low=DV/1000
How it works：硒在身体里做什么？
- 硒被吸收后用于合成约 25 种硒蛋白。
- 其中谷胱甘肽过氧化物酶等参与抗氧化防御。
- 碘甲状腺原氨酸脱碘酶是硒蛋白，参与甲状腺激素代谢。
Schematic only; positions and scale are not anatomical.
Limits and cautions：成人 UL 为 400 mcg/天；长期超量可致脱发、指甲变脆等硒中毒表现。
Sources：NIH ODS: Selenium Fact Sheet for Health Professionals
Daily dose across products（mcg/day）
DV 55
UL 400
2 mcglog scale · n=3,209750 mcg
Label data from official national databases and brand websites, as declared; not lab-verified.
Common forms
| Form | Products | Median | P5–P95 | Elemental fraction |
|---|---|---|---|---|
| Selenium selenomethionine | 1271 | 70 mcg | 10.5 – 200 | 40.3% [source] |
| Selenium selenite | 433 | 50 mcg | 3.5 – 250 | — |
| Selenium selenate | 172 | 50 mcg | 14 – 2,000 | — |
| Selenium yeast | 121 | 100 mcg | 12.5 – 200 | — |
Top ranked
| Rank | Brand | Product | Per day | Score |
|---|---|---|---|---|
| 1 | Swanson | SelenoExcell Selenium 200 mcg | 200 mcg | 90.0 |
| 2 | Swanson | Selenium 100 mcg | 200 mcg | 88.0 |
| 2 | GNC | Selenium 200 | 200 mcg | 88.0 |
| 2 | GNC | Selenium 200 mcg | 200 mcg | 88.0 |
| 2 | Nature's Bounty | Selenium 200 mcg | 200 mcg | 88.0 |
For information only; not medical advice. Talk to a doctor or pharmacist before starting or stopping any supplement.