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B12 500 mcg

Life Extension
4.8
★ ★ ★ ★ ★
(13156 ratings)
Vitamin B12 500 mcg
Product Image
Score85
A clean, practical methylcobalamin product with a useful amount and easy delivery. It is best for a defined B12 need rather than broad energy support.
How scoring works
Quantity:100 Liquid(s) • (100 servings)
Goals:
Energy
General Health
Productivity Boost
Hair Health

Score 85

A clean, practical methylcobalamin product with a useful amount and easy delivery. It is best for a defined B12 need rather than broad energy support.
How scoring works
$6.56($0.06 per serving)
Pure Formulas
$ 6.56
Vitacost
$ 6.95
iHerb
$ 6.75
Amazon
$ 6.56
Report prices

Analysis

Methylcobalamin supplies a preferred B12 form at a meaningful amount for routine support. It contributes to normal energy metabolism, nerve function, and red blood cell formation when intake is inadequate.

The oral-dissolving format may suit people who dislike standard capsules. The single active is clearly disclosed, so the formula is easy to assess.

Strong serving value supports ongoing use without unrelated active ingredients. People with adequate B12 status should not expect it to act as a general stimulant or solve unrelated fatigue.

Who is it for
  • Adults seeking routine B12 support
  • People who prefer oral-dissolving delivery
  • Users wanting a single active ingredient
Best for
  • Maintenance B12 intake
  • Supporting normal energy metabolism
  • Simple bioactive-form supplementation

Pros

  • Uses methylcobalamin
  • Meaningful 500 mcg amount
  • Focused formula
  • Strong serving value

Cons

  • Below the amount often chosen for higher needs
  • Covers only one nutrient pathway
  • Complete non-active ingredients are unavailable
  • Not a stimulant or broad energy formula

Warnings

  • People with adequate B12 status may gain little from continued high intake
  • The oral-dissolving format may contain non-active ingredients not supplied here
  • Persistent fatigue needs evaluation beyond simply increasing B12 intake

Nutrient quality

93 Highest impact

A preferred bioactive B12 form closely fits the intended use. The amount is meaningful, although its suitability depends on whether routine or higher intake is needed.

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Ingredient transparency

84 Highest impact

Active names and amounts are clearly stated, with no hidden proprietary dose. Complete intake directions and a full inactive-ingredient list are not included in the supplied data.

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Customer satisfaction

73 High impact

Supplied satisfaction metrics indicate a strong result with a meaningful response pool. Detailed experience themes are absent, so recurring complaints and real-world purpose fit remain uncertain.

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Value for money

86 Highest impact

Serving value appears favorable relative to the disclosed form and amount. The focused formula avoids low-value extras.

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Report analysis

Goals

Energy
Energy
Impact
Highest effect
A+ Goal FitA Strength of SupportC CoverageA+ Formula Quality
Vitamin B12 · 500 mcg

Methylcobalamin supports red blood cell formation, nerve function, and cellular energy metabolism. The amount and active form are clearly disclosed.

Benefit is most likely when B12 intake or status is low. The single nutrient does not address iron, folate, thyroid, sleep, or mitochondrial causes of fatigue.

Study evidence
Vitamin B12 Disputed 14 studies
General Health
General Health
Impact
Highest effect
A+ Goal FitA- Strength of SupportC CoverageA+ Formula Quality
Vitamin B12 · 500 mcg

Bioactive vitamin B12 directly supports energy metabolism, nerve function, and red blood cell formation. The lozenge is especially relevant for people with low dietary intake or increased deficiency risk.

Methylcobalamin and prolonged mouth contact strengthen the delivery approach. The 500 mcg amount is meaningful for routine support, though higher needs may require a different regimen.

Study evidence
Vitamin B12 Adverse 66 studies
Productivity Boost
Productivity Boost
Impact
High effect
C+ Goal FitA Strength of SupportD CoverageA Formula Quality
Vitamin B12 · 500 mcgVitamin B12 · 500 mcg

The 500 mcg serving of vitamin B12 may support energy metabolism and mental clarity when low B12 status contributes to fatigue. People with adequate B12 status should not expect a direct stimulant-like productivity effect.

Methylcobalamin is clearly named, allowing the active form to be judged. The single-active formula is focused but covers only a foundational nutrient pathway.

Study evidence
Vitamin B12 Supportive 15 studies
Vitamin B12 No effect 17 studies
Hair Health
Hair Health
Impact
High effect
C Goal FitA- Strength of SupportD CoverageA Formula Quality

Methylcobalamin supports red blood cell formation and may help hair when a B12 deficiency is contributing to shedding. The lozenge provides a clearly stated, meaningful amount in a preferred active form.

The formula addresses one indirect nutrient-deficiency pathway without keratin, minerals, vitamin D, or follicle-focused support. People with adequate B12 status should not expect the same hair benefit as someone correcting a deficiency.

Study evidence
Vitamin B12 Disputed 17 studies

Ingredients

IngredientAmount per serving
Vitamin B12 (Methylcobalamin)
 500 mcg
Adults 18–50
Report overview
Vitamin B12 (Methylcobalamin) · 500 mcg OverallScore88
A+ Active Ingredient Quality & BioavailabilityB Dose, Safety & Label TransparencyB+ Value

Methylcobalamin and lozenge delivery pair a preferred form with an absorption-focused format. The 500 mcg amount is meaningful but below the threshold specified for higher needs. Cost efficiency remains strong for a bioactive form.

View ingredientView products
Loading alternative details
89 Performance

Methyl B-12 1000 mcg & Methyl Folate 400 mcg plus P-5-P Lemon Flavor

Jarrow Formulas
<p>Methylcobalamin, folate, and active vitamin B6 support linked energy and methylation pathways with clearly stated amounts. The 1,000 mcg amount exceeds the original 500 mcg serving, so it fits a defined higher-intake need better than routine maintenance.</p>
87 Performance

Fully Active B12 1500 mcg

Doctor's Best
<p>1,500 mcg of bioactive methylcobalamin provides a focused, easy-to-assess vitamin B12 option. The 1,500 mcg amount exceeds the original 500 mcg serving, so it fits a defined higher-intake need better than routine maintenance.</p>
87 Performance

B12 Energizer+ Natural Cherry Flavor

Advanced Nutrition by Zahler
<p>5,000 mcg of bioactive methylcobalamin provides a focused, easy-to-assess vitamin B12 option. The 5,000 mcg amount exceeds the original 500 mcg serving, so it fits a defined higher-intake need better than routine maintenance.</p>
86 Budget

Vitamin B12 2000 mcg

Nutricost
<p>One of the lowest-cost eligible options provides 2,000 mcg of methylcobalamin in a clearly disclosed formula. The 2,000 mcg amount exceeds the original 500 mcg serving, so it fits a defined higher-intake need better than routine maintenance.</p>
86 Budget

Quick Dissolve B-12 Methylcobalamin 2500 mcg

Nature's Bounty
<p>One of the lowest-cost eligible options provides 2,500 mcg of methylcobalamin in a clearly disclosed formula. The 2,500 mcg amount exceeds the original 500 mcg serving, so it fits a defined higher-intake need better than routine maintenance.</p>
87 Budget

B12 Methylcobalamin 1000 mcg

Natural Factors
<p>One of the lowest-cost eligible options provides 1,000 mcg of methylcobalamin in a clearly disclosed formula. The 1,000 mcg amount exceeds the original 500 mcg serving, so it fits a defined higher-intake need better than routine maintenance.</p>
87 Value

Chewable Fully Active B12 Chocolate Mint Flavor 1000 mcg

Doctor's Best
<p>1,000 mcg of methylcobalamin supplies a bioactive form without low-value nutrient extras. The focused formula supports reasonable value, and the 1,000 mcg amount exceeds the original 500 mcg serving, so it fits a defined higher-intake need better than routine maintenance.</p>
85 Value

Vegan B12 2500 mcg

DEVA
<p>2,500 mcg of methylcobalamin supplies a bioactive form without low-value nutrient extras. The focused formula supports reasonable value, and the 2,500 mcg amount exceeds the original 500 mcg serving, so it fits a defined higher-intake need better than routine maintenance.</p>
83 Value

Sublingual Methylcobalamin 1000 mcg

Solgar
<p>1,000 mcg of methylcobalamin supplies a bioactive form without low-value nutrient extras. The focused formula supports reasonable value, and the 1,000 mcg amount exceeds the original 500 mcg serving, so it fits a defined higher-intake need better than routine maintenance.</p>
Report alternatives

Sources

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

  1. Effects of Vitamin B12 Supplementation on Cognitive Function, Depressive Symptoms, and Fatigue: A Systematic Review, Meta-Analysis, and Meta-Regression.
    Markun S; Gravestock I; Jäger L; Rosemann T; Pichierri G; Burgstaller JM · Nutrients · 2021
    Meta-analysis6,276 participants16 studies pooledEnergy forVitamin B12
  2. Cobalamin deficiency: clinical picture and radiological findings.
    Briani C; Dalla Torre C; Citton V; Manara R; Pompanin S; Binotto G; Adami F · Nutrients · 2014
    Narrative reviewEnergy forVitamin B12
  3. Vitamin B12 Supplementation: Is More Always Better?
    Yepes-Calderón M; Doorenbos CSE; Stegmann ME; Touw DJ; Harmsen HJM; Heiner-Fokkema MR; van Spronsen FJ; Corpeleijn E; Bakker SJL · Nutrients · 2026
    Narrative reviewEnergy forVitamin B12
  4. Association of Vitamin B12, Vitamin D, and Thyroid-Stimulating Hormone With Fatigue and Neurologic Symptoms in Patients With Fibromyalgia.
    Munipalli B; Strothers S; Rivera F; Malavet P; Mitri G; Abu Dabrh AM; Dawson NL · Mayo Clinic proceedings. Innovations, quality & outcomes · 2022
    Observational study2,142 participantsEnergy forVitamin B12
  5. A new perspective on vitamin B12 deficiency in rheumatology: a case-based review.
    Dułak NA; Rytlewska M; Jaskólska M; Chmielewski M · Rheumatology international · 2024
    Case series3 participantsEnergy forVitamin B12
  6. Patients' experiences with methylcobalamin injections in amyotrophic lateral sclerosis.
    Zubair AS; Saab L; Scharer K; Khokhar B · Brain circulation · 2024
    Qualitative study5 participantsEnergy forVitamin B12
  7. Vitamin B12 Deficiency: Common Questions and Answers.
    Patel H; McGuirk R · American family physician · 2025
    Narrative reviewEnergy forVitamin B12
  8. Oral Vitamin B12 versus Placebo for the Prevention of Chemotherapy-Induced Peripheral Neuropathy in Gynecological Cancer Patients: A Randomized, Double-Blind, Placebo-Controlled Trial.
    Insin P; Chaiwongsa T; Prueksaritanond N · Asian Pacific journal of cancer prevention : APJCP · 2026
    Randomized trial40 participantsGeneral Health forVitamin B12
  9. Vitamin B12 Supplementation in Diabetic Neuropathy: A 1-Year, Randomized, Double-Blind, Placebo-Controlled Trial.
    Didangelos T; Karlafti E; Kotzakioulafi E; Margariti E; Giannoulaki P; Batanis G; Tesfaye S; Kantartzis K · Nutrients · 2021
    Randomized trial90 participantsGeneral Health forVitamin B12
  10. A single-center randomized controlled trial of local methylcobalamin injection for subacute herpetic neuralgia.
    Xu G; Lv ZW; Feng Y; Tang WZ; Xu GX · Pain medicine (Malden, Mass.) · 2014
    Randomized trial98 participantsGeneral Health forVitamin B12
  11. Local Injection of Methylcobalamin Combined with Lidocaine for Acute Herpetic Neuralgia.
    Xǔ G; Xu S; Tang WZ; Xú G; Cheng C; Xu J · Pain medicine (Malden, Mass.) · 2017
    Randomized trial204 participantsGeneral Health forVitamin B12
  12. The Effect of Vitamin B12 and Folic Acid Supplementation on Serum Homocysteine, Anemia Status and Quality of Life of Patients with Multiple Sclerosis.
    Nozari E; Ghavamzadeh S; Razazian N · Clinical nutrition research · 2022
    Clinical trial50 participantsGeneral Health forVitamin B12
  13. Quantitative Analysis of Selected Circulating Hematological Biomarkers, Essential Minerals, Vitamins, and Thyroid Hormones in Females Affected by Hair Loss.
    Al-Fawaeir S; Al-Odat I · Diseases (Basel, Switzerland) · 2025
    Case-control study200 participantsHair Health forVitamin B12
  14. Factors Associated with Premature Hair Graying in a Young Indian Population.
    Chakrabarty S; Krishnappa PG; Gowda DG; Hiremath J · International journal of trichology · 2016
    Case-control study74 participantsHair Health forVitamin B12
  15. Risk Factors for Pediatric Alopecia Areata: Clinical and Biochemical Findings from a Case - Control Study.
    İritaş SY · Dermatology practical & conceptual · 2026
    Case-control study600 participantsHair Health forVitamin B12
  16. Hair Loss After Laparoscopic Sleeve Gastrectomy.
    Katsogridaki G; Tzovaras G; Sioka E; Perivoliotis K; Zachari E; Magouliotis D; Tasiopoulou V; Chatedaki C; Zacharoulis D · Obesity surgery · 2019
    Cohort study50 participantsHair Health forVitamin B12
  17. Demographic Characteristics and Association of Serum Vitamin B12, Ferritin and Thyroid Function with Premature Canities in Indian Patients from an Urban Skin Clinic of North India: A Retrospective Analysis of 71 Cases.
    Sonthalia S; Priya A; Tobin DJ · Indian journal of dermatology · 2022
    Cross-sectional study71 participantsHair Health forVitamin B12
  18. Effects of Folic Acid and Vitamin B12, Alone and in Combination on Cognitive Function and Inflammatory Factors in the Elderly with Mild Cognitive Impairment: A Single-blind Experimental Design.
    Ma F; Zhou X; Li Q; Zhao J; Song A; An P; Du Y; Xu W; Huang G · Current Alzheimer research · 2020
    Randomized trial240 participantsProductivity Boost forVitamin B12
  19. Effects of Physical Activity and Micronutrients on Cognitive Performance in Children Aged 6 to 11 Years: A Systematic Review and Meta-Analysis of Randomized Controlled Trials.
    Meli AM; Ali A; Mhd Jalil AM; Mohd Yusof H; Tan MMC · Medicina (Kaunas, Lithuania) · 2022
    Meta-analysisProductivity Boost forVitamin B12
  20. Cognitive function in an elderly population: interaction between vitamin B12 status, depression, and apolipoprotein E ε4: the Hordaland Homocysteine Study.
    Vogiatzoglou A; Smith AD; Nurk E; Drevon CA; Ueland PM; Vollset SE; Nygaard HA; Engedal K; Tell GS; Refsum H · Psychosomatic medicine · 2013
    Cross-sectional study1,935 participantsProductivity Boost forVitamin B12
  21. Cognitive profile and inflammatory markers in children and adolescents with specific learning disorder: a cross-sectional study.
    Balatacı U; Ay B · Frontiers in pediatrics · 2026
    Case-control study108 participantsProductivity Boost forVitamin B12
  22. Association between vitamin B12 levels and cognitive impairment in older adults.
    Aguilar-Navarro SG; Carbajal-Silva JC; Palacios-Hernández MGI; Gutiérrez-Gutierrez LA; Ávila-Funes JA; Mimenza-Alvarado AJ · Gaceta medica de Mexico · 2023
    Cross-sectional study241 participantsProductivity Boost forVitamin B12
  23. Effects of vitamin B12 on performance and circadian rhythm in normal subjects.
    Mayer G; Kröger M; Meier-Ewert K · Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology · 1997
    Randomized trial20 participantsProductivity Boost forVitamin B12
  24. Prenatal vitamin B12 status and cognitive functioning in children at 4 years of age: The ECLIPSES Study.
    Cruz-Rodríguez J; Canals-Sans J; Hernández-Martínez C; Voltas-Moreso N; Arija V · Maternal & child nutrition · 2023
    Cohort study249 participantsProductivity Boost forVitamin B12
  25. Dietary intakes and biomarker patterns of folate, vitamin B6, and vitamin B12 can be associated with cognitive impairment by hypermethylation of redox-related genes NUDT15 and TXNRD1.
    An Y; Feng L; Zhang X; Wang Y; Wang Y; Tao L; Qin Z; Xiao R · Clinical epigenetics · 2020
    Cohort study2,533 participantsProductivity Boost forVitamin B12
  26. Homocysteine, folate, and vitamins B6 and B12 blood levels in relation to cognitive performance: the Maine-Syracuse study.
    Elias MF; Robbins MA; Budge MM; Elias PK; Brennan SL; Johnston C; Nagy Z; Bates CJ · Psychosomatic medicine · 2008
    Cross-sectional study812 participantsProductivity Boost forVitamin B12