Selenium 200 mcg

Selenium 200 mcg

NOW4.8 (32,001 ratings)
Format:Capsule Quantity: 180 Capsule(s) · 180 servings
Goals

Product analysis

96 out of 100

Selenium 200 mcg offers an affordable way to add selenium when dietary intake is low. Extra benefit is less likely if you already get enough.

AI assessment of the formula, label and price. How scoring works

Nutrient Quality100

Selenium is clearly identified as L-selenomethionine. That makes the source easy to check when comparing supplements.

Ingredient Transparency100

The amount and selenium form are both disclosed. You can see what each serving supplies and compare it with alternatives.

Value For Money100

The selenium serving offers very good value. It is an economical choice for someone who needs additional selenium.

Customer Satisfaction93

Customer feedback is very positive across a large number of ratings. The substantial review history gives a broad picture of satisfaction.

Product Focus84

The simple formula is focused on selenium intake and normal immune function. Its usefulness depends mainly on whether your diet already supplies enough.

Format
Capsule
Container
180 Capsule(s)
Per serving
$0.06
Customer rating
4.8 · 32,001 ratings
Report analysis

Goals

Everyday Health
Impact
Highest effect
A+ Ingredient FitC PathwaysB+ EvidenceA+ Formulation Logic
Selenium · 200 mcg
Study evidence
Selenium Supportive 70 studies
Immunity
Impact
Highest effect
A+ Ingredient FitD+ PathwaysA- EvidenceA+ Formulation Logic
Selenium · 200 mcg
Study evidence
Selenium Mixed 37 studies

Ingredients

IngredientAmount per servingScore
Selenium (L-Selenomethionine)
200 mcg 100
Gluten Free Adults 18–50 Vegan Kosher Dairy Free Vegetarian
Report overview
A+ Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyA+ Value
Each serving supplies 200 mcg of selenium, with a low cost relative to the amount supplied. It matches the amount used for antioxidant and thyroid support in many trials. The selenium is supplied as L-Selenomethionine.
How this ingredient is rated

Active Ingredient Quality & Bioavailability100

The selenium is supplied as L-Selenomethionine.
Selenium Chemical Form
The selenium is supplied as L-Selenomethionine.
Form Transparency & Isomer Specificity
The selenium is supplied as L-Selenomethionine.

Dose, Safety & Label Transparency100

The serving provides 200 mcg of selenium. It matches the amount used for antioxidant and thyroid support in many trials.
Dosage Efficacy Sweet Spot
The serving supplies 200 mcg of selenium. It matches the amount used for antioxidant and thyroid support in many trials.
Safety Margin & UL Adherence
The 200 mcg serving is below the adult upper limit, leaving room for selenium from food.

Value100

The cost relative to the amount of selenium is low.
Price per 200 mcg Serving
The cost relative to the amount of selenium is low.
Report alternatives

Sources

Published studies used for the product analysis and the top-ranked studies for each ingredient and goal.

  1. Associations of selenium status with all-cause and cause-specific mortality: a systematic review and meta-analysis of cohort studies.
    Cui Z; Xie R; Lu X; Schomburg L; Brenner H; Schöttker B · Redox biology · 2025
    Meta-analysis95 participants20 studies pooledEveryday Health forSelenium
  2. Dietary Antioxidants, Circulating Antioxidant Concentrations, Total Antioxidant Capacity, and Risk of All-Cause Mortality: A Systematic Review and Dose-Response Meta-Analysis of Prospective Observational Studies.
    Jayedi A; Rashidy-Pour A; Parohan M; Zargar MS; Shab-Bidar S · Advances in nutrition (Bethesda, Md.) · 2019
    Meta-analysis507,251 participants41 studies pooledEveryday Health forSelenium
  3. The efficacy and safety of selenium supplementation versus placebo in the treatment of Graves' orbitopathy: A systematic review and meta-analysis of randomised controlled trials.
    Sharabati I; Qafesha RM; Hindawi MD; Amro S; Ayesh BM · Clinical endocrinology · 2024
    Meta-analysis4 studies pooledEveryday Health forSelenium
  4. Associations of plasma metal concentrations with the risks of all-cause and cardiovascular disease mortality in Chinese adults.
    Shi L; Yuan Y; Xiao Y; Long P; Li W; Yu Y; Liu Y; Liu K; Wang H; Zhou L; Yang H; Li X; He M; Wu T · Environment international · 2021
    Cohort study6,155 participantsEveryday Health forSelenium
  5. Updates on clinical studies of selenium supplementation in radiotherapy.
    Puspitasari IM; Abdulah R; Yamazaki C; Kameo S; Nakano T; Koyama H · Radiation oncology (London, England) · 2015
    Systematic review16 studies pooledEveryday Health forSelenium
  6. Effects of selenium supplementation on selenoprotein gene expression and response to influenza vaccine challenge: a randomised controlled trial.
    Goldson AJ; Fairweather-Tait SJ; Armah CN; Bao Y; Broadley MR; Dainty JR; Furniss C; Hart DJ; Teucher B; Hurst R · PloS one · 2011
    Randomized trial119 participantsImmunity forSelenium
  7. Effect of selenium on immune response against hepatitis B vaccine with accelerated method in insulin-dependent diabetes mellitus patients.
    Janbakhsh A; Mansouri F; Vaziri S; Sayad B; Afsharian M; Rahimi M; Shahebrahimi K; Salari F · Caspian journal of internal medicine · 2013
    Randomized trial62 participantsImmunity forSelenium
  8. Chemoprevention trial of human hepatitis with selenium supplementation in China.
    Yu SY; Li WG; Zhu YJ; Yu WP; Hou C · Biological trace element research · 1990
    Non-randomized trial20,847 participantsImmunity forSelenium
  9. Selenium nanoparticles as adjunctive therapy in sepsis: A pilot randomized clinical trial.
    Gu WJ; Huang W; Zhao FZ; Yuan XK; Jin K; Chen JL; Zhang CY; Huang Y; He L; Zhuang H; Yin HY; Chen T · Drug resistance updates : reviews and commentaries in antimicrobial and anticancer chemotherapy · 2026
    Randomized trial70 participantsImmunity forSelenium
  10. Selenium supplementation in patients with autoimmune thyroiditis decreases thyroid peroxidase antibodies concentrations.
    Gärtner R; Gasnier BC; Dietrich JW; Krebs B; Angstwurm MW · The Journal of clinical endocrinology and metabolism · 2002
    Randomized trial70 participantsImmunity forSelenium