Selenium 200 mcg

Selenium 200 mcg

California Gold Nutrition4.8 (12,992 ratings)
Format:Capsule Quantity: 180 Capsule(s) · 180 servings
Goals
$9.27 $0.05 per serving
iHerb$9.27

Product analysis

97 out of 100

Selenium 200 mcg offers an economical source of selenium for normal immune and antioxidant functions when intake is low. Extra selenium does not reliably add benefits when nutritional needs are already met.

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

Nutrient Quality100

The selenium is supplied in a favorable form for nutrient availability.

Ingredient Transparency100

The selenium amount and form are clearly disclosed. That makes the single-ingredient serving easy to compare with alternatives.

Value For Money100

The selenium offers favorable value for the amount supplied. The low serving cost makes it an economical way to obtain this nutrient.

Customer Satisfaction93

Customer ratings are strongly positive across a very large number of reviews. The broad feedback supports general satisfaction without proving immune benefits.

Product Focus84

The single-ingredient formula has a clear nutritional role in normal immune and antioxidant functions. Its usefulness depends on intake, with no reliable extra benefit when selenium needs are already met.

Format
Capsule
Container
180 Capsule(s)
Per serving
$0.05
Customer rating
4.8 · 12,992 ratings
Report analysis

Goals

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

Ingredients

IngredientAmount per servingScore
Selenium (L-Selenomethionine)
 200 mcg 100
Gluten Free Adults 18–50 Dairy Free
Report overview
Selenium (L-Selenomethionine) · 200 mcg OverallScore100
A+ Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyA+ Value
Each serving supplies 200 mcg of selenium, and the cost is low for that amount. It uses L-Selenomethionine, a well-absorbed organic form.
How this ingredient is rated

Active Ingredient Quality & Bioavailability100

L-Selenomethionine is a well-absorbed organic form.
Selenium Chemical Form
L-Selenomethionine is a well-absorbed organic form.
Form Transparency & Isomer Specificity
The label specifies the L form of selenomethionine.

Dose, Safety & Label Transparency100

The serving provides 200 mcg, an amount commonly used in research. At 200 mcg per serving, selenium is below the 400 mcg upper limit, leaving room for dietary sources.
Dosage Efficacy Sweet Spot
The serving provides 200 mcg, an amount commonly used in research.
Safety Margin & UL Adherence
At 200 mcg per serving, selenium is below the 400 mcg upper limit, leaving room for dietary sources.

Value100

The cost is low for the amount of selenium.
Price per 200 mcg Serving
The cost is low for the amount of selenium.
View ingredientView products
87 Performance

Se-Methyl L-Selenocysteine 200 mcg

Life Extension

Its label clearly provides 200 mcg of Selenium as Se-Methyl L-Selenocysteine, making it a more clearly defined selenium option. Compared with the original, its ingredient and goal alignment is stronger, although the input does not provide independent testing or absorption evidence.

87 Performance

Selenium 200 mcg

Nature's Way

Its label clearly provides 200 mcg of Selenium as L-Selenomethionine, making it a more clearly defined selenium option. Compared with the original, its ingredient and goal alignment is stronger, although the input does not provide independent testing or absorption evidence.

87 Performance

Selenium 200 mcg

NOW

Its label clearly provides 200 mcg of Selenium as L-Selenomethionine, making it a more clearly defined selenium option. Compared with the original, its ingredient and goal alignment is stronger, although the input does not provide independent testing or absorption evidence.

87 Budget

Selenium 100 mcg

Swanson

Its label clearly provides 100 mcg of Selenium as Selenium SeLECT L-Selenomethionine, preserving relevant selenium coverage. Compared with the original, it lowers the serving cost, although the input does not provide independent testing or absorption evidence.

85 Budget

Selenium 100 mcg

NOW

Its label clearly provides 100 mcg of Selenium as L-Selenomethionine, preserving relevant selenium coverage. Compared with the original, it lowers the serving cost, although the input does not provide independent testing or absorption evidence.

84 Budget

Selenium 100 mcg

Source Naturals

Its label clearly provides 100 mcg of Selenium as Selenium Yeast, preserving relevant selenium coverage. Compared with the original, it lowers the serving cost, although the input does not provide independent testing or absorption evidence.

87 Value

Selenium 200 mcg

NOW

Its label clearly provides 200 mcg of Selenium as L-Selenomethionine, keeping the formula relevant to selenium. Compared with the original, the similar serving economics and ingredient detail create a useful quality-to-cost balance, although the input does not provide independent testing or absorption evidence.

86 Value

Selenium 200 mcg

Solgar

Its label clearly provides 200 mcg of Selenium as L-Selenomethionine, keeping the formula relevant to selenium. Compared with the original, the somewhat higher serving cost and ingredient detail create a useful quality-to-cost balance, although the input does not provide independent testing or absorption evidence.

86 Value

SeMSC Selenium 200 mcg

Swanson

Its label clearly provides 200 mcg of Selenium as L-Se-Methylselenocysteine, keeping the formula relevant to selenium. Compared with the original, the somewhat higher serving cost and ingredient detail create a useful quality-to-cost balance, although the input does not provide independent testing or absorption evidence.

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