Selenium 200 mcg

Selenium 200 mcg

Source Naturals4.9 (5,495 ratings)
Format:Tablet Quantity: 120 Tablet(s) · 120 servings
Goals
$9.27 $0.07 per serving

Product analysis

86 out of 100

Selenium 200 mcg offers an inexpensive way to support normal immune function when selenium intake is low.

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

Nutrient Quality80

Selenium is supplied as L-selenomethionine, a readily usable form. The accompanying calcium source is identified, but its absorption quality is less clear.

Ingredient Transparency100

Both nutrient amounts and forms are stated. That makes the selenium and accompanying calcium straightforward to check and compare.

Value For Money80

Selenium compares very favorably on cost for the amount supplied. The value of the accompanying calcium remains uncertain.

Customer Satisfaction94

Customer feedback is strongly positive across several thousand reviews. The large review base makes the satisfaction pattern less dependent on a small group of opinions.

Product Focus81

The formula is closely focused on selenium nutrition and normal immune function. Extra selenium does not reliably add benefit when intake is already adequate.

Format
Tablet
Container
120 Tablet(s)
Per serving
$0.07
Customer rating
4.9 · 5,495 ratings
Report analysis

Goals

Everyday Health
Impact
Highest effect
A+ Ingredient FitC PathwaysB+ EvidenceA+ Formulation Logic
Selenium · 200 mcg

Selenium contributes to nutrient availability when dietary intake is insufficient. Its antioxidant-enzyme role does not establish extra benefit for people already obtaining adequate selenium, as most U.S. adults do. Calcium is also present, but 37 mg per serving is a small contribution compared with ordinary adult daily intake references.

How this product is rated for Everyday Health

Ingredient fit97

Selenium is the evaluated credited ingredient and receives full amount recognition.
Goal fit
The credited ingredients provide a clear connection to the reviewed general-health functions.
Dose adequacy
The evaluated amounts receive full recognition; this does not establish additional benefit beyond adequate intake.

Pathways60

Selenium supplies the antioxidant-and-immune-defence finding.
Depth
Selenium supplies the antioxidant-and-immune-defence finding.
Breadth
Coverage is concentrated in one functional area.

Evidence82

Selenium evidence supports conditional nutritional availability.
Evidence strength
Selenium evidence supports conditional nutritional availability.
Studied preparation
The evaluated nutrient declarations are recognized without a bonus for chemical form or delivery method.

Formulation logic100

The recognized ingredients have their required partners or work independently, with no matched formulation conflict.
Partner coverage
Recognized ingredients have any required partner or work independently; this does not establish added combination benefit.
Conflicts
No matched formulation conflict appears in the supplied findings.
Effective doses
All included ingredients meet the saved amount threshold; it is not a guarantee of clinical benefit or safety.
Study evidence
Selenium Supportive 70 studies
Immunity
Impact
Highest effect
B+ Ingredient FitD+ PathwaysA- EvidenceA+ Formulation Logic
Selenium · 200 mcg

Selenium contributes to normal immune function and selenium-dependent defenses when intake is inadequate. Extra selenium does not reliably improve these functions once status is adequate. The declared amount meets the saved comparison, but its particular form does not establish greater immune benefits or routine protection against respiratory infection.

How this product is rated for Immunity

Ingredient fit83

Selenium anchors the immune-related findings. Its declared amount supports a clear, limited contribution.
Goal fit
Immune-related ingredients sit within a broader formula, so a smaller share of its active ingredients is concentrated on this goal.
Dose adequacy
Selenium’s serving amount meets the saved amount comparison; this comparison does not identify an optimal clinical intake.

Pathways53

The strongest saved connection is to oxidative and inflammatory balance. Coverage of the remaining processes is narrower.
Depth
The strongest saved connection is to oxidative and inflammatory balance; the finding describes coverage of that process, not measured improvement in immunity.
Breadth
The saved findings extend to oxidative and inflammatory balance. Other processes have less coverage.

Evidence85

Selenium leads this finding. Nutrient roles and regular-use evidence remain distinct from proven infection prevention.
Evidence strength
Selenium leads the saved evidence finding, based on its bounded nutrient-function support.
Studied preparation
The counted preparations meet the saved preparation comparison; that finding does not establish superiority of their specific forms.

Formulation logic100

No required partner is missing and neither zinc conflict is triggered. Counted ingredients meet the minimum amount comparison.
Partner coverage
The counted ingredients work independently under the supplied findings and have no missing required partner; this does not establish synergy.
Conflicts
Neither zinc-related conflict is triggered by the supplied amounts and ingredient presence; this is a limited interaction check.
Effective doses
All counted ingredients meet the saved minimum amount comparison; ingredients excluded for small or unresolved amounts are not made effective by this finding.
Study evidence
Selenium Mixed 37 studies

Ingredients

IngredientAmount per servingScore
Calcium (Dibasic Calcium Phosphate)
37 mg
Selenium (L-Selenomethionine)
200 mcg 100
Gluten Free Adults 18–50 Dairy Free Sugar Free Vegetarian
Report overview
A+ Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyA+ Value
A serving supplies 200 mcg of selenium from L-selenomethionine. The whole-product price works out to $0.08 per 200 mcg of selenium.
How this ingredient is rated

Active Ingredient Quality & Bioavailability100

Selenium comes from L-selenomethionine, an identified organic form.
Selenium Chemical Form
Selenium comes from L-selenomethionine, an identified organic form.
Form Transparency & Isomer Specificity
The name identifies the L form of selenomethionine.

Dose, Safety & Label Transparency100

The serving provides 200 mcg of selenium. It is below the adult upper limit, leaving room for selenium from other sources.
Dosage Efficacy Sweet Spot
The serving provides 200 mcg of selenium.
Safety Margin & UL Adherence
The 200 mcg of selenium per serving is below the adult upper limit, leaving room for selenium from other sources.

Value100

Based on the whole-product price, 200 mcg of selenium corresponds to $0.08.
Price per 200 mcg Serving
Based on the whole-product price, 200 mcg of selenium corresponds to $0.08.
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