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Formula 304

product on market Capsule DC Safety: 100/100
100/100

This product looks safe

  • No ingredients exceed tolerable upper intake levels
  • 100% of ingredients have research evidence
A Label Compliance Grade

What the Evidence Says

✨ AI-generated · Qwen 3.6 · grounded in 1 source · methodology

SeleniumSeLECT provides a bioavailable form of selenium, which supports antioxidant enzyme function and thyroid health. Research evidence for selenium supplementation is generally moderate, though effectiveness varies based on individual baseline levels. The ingredient profile maintains a high safety rating.

AI-generated summary based on research evidence. Not medical advice.

Label

Product Label

Label for Formula 304
Open Full PDF View on NIH DSLD →
Details

Label Data

1 Capsule(s)
Serving Size
30
Servings
Mineral
Product Type
100%
Evidence Coverage
Ingredients

Supplement Facts — Evidence Check

200 mcg (364% DV)
3.6× RDA — above typical dose (UL: 0.4 mg) 173 studies (A:0, B:67)

Other Ingredients

Cellulose Gelatin Silica Magnesium Stearate
Claims

Label Claims — Verification

Unverified Nutrient
Unverified All Other
Info

Product Information

Directions for Use

Directions: As a dietary supplement, take 1 capsule daily.

Warnings & Precautions

Tamper Evident: Do not use this product if imprinted foil seal under cap is broken or missing.

Keep out of reach of children.

Caution: If you are pregnant or nursing do not take this product.

Formulation Notes

Mfg. in an FDA Registered Facility using Good Manufacturing Practices (GMPs)

(SeleniumSeLECT) Yeast free selenium is a rich source of natural and organic L-selenomethionine.

Gluten free

Seleno Y-F Yeast free selenium 200 mcg

Conforms to USP <2091> for weight. Meets USP <2040> disintegration for maximum bioavailability. Made in USA

Additional Information

Keep tightly closed. Store at room temperature: 59 degrees - 86 degrees F (15 degrees to 30 degrees C).

Quali Pure

Metadata

Product Details

DSLD Entry Date2022-02-23
Product TypeMineral
FormCapsule
BrandDC
DSLD ID266661
Data Updated2026-04-11
Research

Research Evidence

273
Research Sources
55
Avg Quality
131
Meta Analysis
61
Systematic Review
55
Rct
19
Clinical Trial
2
Regulatory Source
1
Cochrane Review
1
Other
1
Observational
1
Openfda Safety
A Selenium for preventing cancer
Meta Analysis The Cochrane database of systematic reviews 2018 PubMed DOI
A Selenium supplementation for the primary prevention of cardiovascular disease
Meta Analysis The Cochrane database of systematic reviews 2013 PubMed DOI
A Selenium supplementation for critically ill adults
Meta Analysis The Cochrane database of systematic reviews 2015 PubMed DOI
A Vitamin E and the risk of prostate cancer: the Selenium and Vitamin E Cancer Prevention Trial (SELECT)
Rct JAMA 2011 PubMed DOI
B Selenium and prostate cancer: systematic review and meta-analysis
Meta Analysis The American journal of clinical nutrition 2012 PubMed DOI
B Selenium supplementation for Hashimoto's thyroiditis
Systematic Review The Cochrane database of systematic reviews 2013 PubMed DOI
B Pharmacological interventions for preventing dry mouth and salivary gland dysfunction following radiotherapy
Meta Analysis The Cochrane database of systematic reviews 2017 PubMed DOI
B Selenium, antioxidants, cardiovascular disease, and all-cause mortality: a systematic review and meta-analysis of randomized controlled trials
Meta Analysis The American journal of clinical nutrition 2020 PubMed DOI
B The effect of selenium supplementation on coronary heart disease: A systematic review and meta-analysis of randomized controlled trials
Meta Analysis Journal of trace elements in medicine and biology : organ of the Society for Minerals and Trace Elements (GMS) 2017 PubMed DOI
B Meta-analysis of selenium effects on the meat quality of broilers
Meta Analysis Poultry science 2024 PubMed DOI
View all evidence for Selenium →
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This product page is for informational purposes only and does not constitute medical advice. Always consult your healthcare provider before taking any supplement.