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Selenium

Codeage
4.9
★ ★ ★ ★ ★
(2218 ratings)
Selenium 200 mcg
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Score80
A solid L-selenomethionine capsule with a large supply. The vague, tiny liposomal matrix adds little clear value.
How scoring works
Quantity:180 Capsule(s) • (180 servings)
Goals:
General Health
Immunity

Score 80

A solid L-selenomethionine capsule with a large supply. The vague, tiny liposomal matrix adds little clear value.
How scoring works
$24.99($0.13 per serving)
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Analysis

The formula supplies 200 mcg selenium as L-selenomethionine, a well-absorbed organic form with a specific identity. A single capsule provides a focused amount for users deliberately targeting selenium intake.

The liposomal delivery matrix is listed at only 200 mcg, but its ingredients and active role are not described. That label feature does not provide enough information to establish a meaningful delivery benefit.

A 180-serving supply offers convenient long-term use and favorable per-serving value. Simpler L-selenomethionine products provide similar core nutrition with fewer unanswered formulation details.

Who is it for
  • Adults specifically seeking L-selenomethionine
  • People who prefer a large single-capsule supply
Best for
  • Targeted selenium intake
  • Long-term single-active supplementation
  • Antioxidant-enzyme support

Pros

  • Uses L-selenomethionine
  • Clearly provides 200 mcg selenium
  • One-capsule serving
  • Large supply

Cons

  • Liposomal matrix composition is undisclosed
  • No demonstrated delivery advantage is provided
  • Narrow single-nutrient scope

Warnings

  • The 200 mcg selenium amount should not be combined casually with another selenium supplement.
  • Chronic excess selenium can cause brittle hair or nails, nausea, or a garlic-like breath odor.
  • People being treated for a thyroid disorder should account for total selenium intake with their clinician before adding a substantial dose.

Nutrient quality

87 Highest impact

L-selenomethionine is a preferred organic form with clear isomer disclosure. The selenium amount remains below the adult upper limit but requires accounting for other selenium sources.

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Ingredient transparency

73 High impact

Selenium is clear, but the liposomal matrix amount and composition are poorly defined. Complete directions and inactive ingredients are not supplied.

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Customer satisfaction

73 High impact

The supplied aggregate rating indicates exceptionally strong customer satisfaction. Specific comments are unavailable, so complaint patterns and intended-use fit cannot be verified.

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Value for money

86 Highest impact

Preferred selenium form and a low serving cost create good value. The vague liposomal matrix adds little verified advantage.

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Report analysis

Goals

General Health
Impact
Highest effect
A Goal FitA Strength of SupportC+ CoverageA- Formula Quality
Selenium · 200 mcg

Selenium supports antioxidant defenses, thyroid hormone conversion, and immune function. L-selenomethionine is a well-absorbed organic form, and the disclosed 200 mcg amount fits a targeted selenium supplement.

The formula is narrow but supplies useful depth for a foundational trace mineral. A named delivery matrix adds complexity without enough composition detail to confirm an absorption advantage.

Study evidence
Selenium Supportive 70 studies
Immunity
Impact
Highest effect
A- Goal FitA Strength of SupportC- CoverageA- Formula Quality
Selenium · 200 mcg

L-selenomethionine provides a well-absorbed form of an essential trace mineral. The substantial amount can support selenium status and antioxidant enzyme function.

The formula is narrow and does not cover several other foundations of daily health. The selenium amount leaves limited room for additional selenium from other supplements, so stacking should be avoided.

Study evidence
Selenium Mixed 37 studies

Ingredients

IngredientAmount per serving
Selenium (L-Selenomethionine)
200 mcg
Liposomal Delivery Matrix
200 mcg
Gluten Free Adults 18–50
Report overview
A+ Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyB+ Value

L-selenomethionine supplies the preferred organic form with precise isomer disclosure. The selenium amount matches the common research-reference dose while maintaining a sensible buffer below the upper intake limit. Cost efficiency is good, and the added delivery matrix does not require a large premium.

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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 pooledGeneral 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 pooledGeneral 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 pooledGeneral 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 participantsGeneral 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 pooledGeneral 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