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Sublingual Liquid B-12 2000 mcg with B-Complex

Solgar
4.8
★ ★ ★ ★ ★
(1264 ratings)
Vitamin B12 2000 mcg
Biotin 300 mcg
Vitamin B5 30 mg
Product Image
Score79
A broad, economical liquid B-complex anchored by very high B12. Active riboflavin is a strength, but several other forms are conventional.
How scoring works
Quantity:2 Liquid(s) • (59 servings)
Goals:
General Health
Energy
Productivity Boost
Hair Health

Score 79

A broad, economical liquid B-complex anchored by very high B12. Active riboflavin is a strength, but several other forms are conventional.
How scoring works
$10.42($0.17 per serving)
Daily Vita
$ 11.02
Pure Formulas
$ 11.02
iHerb
$ 10.42
Vitacost
$ 11.00
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Analysis

The liquid supplies 2,000 mcg of B12 plus thiamine, riboflavin, niacin, B6, folate, biotin, and pantothenic acid. That breadth makes it more useful than a plain B12 drop for people seeking multiple B vitamins.

Riboflavin 5-phosphate is a thoughtful form, while B12 is cyanocobalamin and B6 is pyridoxine hydrochloride. The B12 amount is highly concentrated and likely exceeds what many routine users need.

The sublingual format fits people who dislike pills or want flexible liquid use. Users seeking a moderate maintenance formula or all active B-vitamin forms should consider another option.

Who is it for
  • Adults who prefer sublingual liquids
  • Users seeking B12 with supporting B vitamins
Best for
  • Broad B-vitamin supplementation without tablets
  • Targeted high-potency B12 use

Pros

  • Broad B-vitamin profile
  • Uses riboflavin 5-phosphate
  • Fully disclosed amounts
  • Convenient liquid format

Cons

  • B12 amount is very high
  • Uses cyanocobalamin
  • Uses pyridoxine hydrochloride
  • Liquid dosing requires care

Warnings

  • The 2,000 mcg B12 amount is far above basic daily needs and may be unnecessary without a defined reason.
  • Vitamin B6 at 10 mg should be counted with other B-complex supplements.
  • Biotin may interfere with some laboratory tests, so users should follow laboratory guidance before testing.

Nutrient quality

84 Highest impact

The B-complex covers related energy-metabolism nutrients at generally useful amounts. Mixed form quality keeps it from matching an all-active B-complex.

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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

71 High impact

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

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Goals

General Health
General Health
Impact
Highest effect
A Goal FitA- Strength of SupportB+ CoverageA+ Formula Quality
Folate · 333 mcg DFEVitamin B12 · 2000 mcg

A high-potency vitamin B12 amount anchors a broader B-vitamin formula that supports energy metabolism, red blood cell formation, and nerve function. Several additional B vitamins are supplied at meaningful, clearly stated amounts.

The sublingual liquid is practical, although cyanocobalamin and several conventional vitamin forms are less preferred than active alternatives. The coherent B-complex covers more foundational pathways than a single B12 product without relying on unrelated ingredients.

Study evidence
Vitamin B12 Adverse 66 studies
Energy
Energy
Impact
Highest effect
A Goal FitB+ Strength of SupportA- CoverageA Formula Quality
Vitamin B5 · 30 mgRiboflavin · 4 mgThiamin · 4 mgVitamin B12 · 2000 mcg

The liquid combines vitamin B12 with a broad set of B vitamins involved in energy metabolism, nerve function, methylation, and blood-cell formation. Most amounts are meaningful and every nutrient is clearly disclosed.

Riboflavin phosphate is favorable, while cyanocobalamin, pyridoxine hydrochloride, and unspecified folate provide mixed form quality. The very large B12 amount is more than routine maintenance usually requires but may suit a targeted strategy.

Study evidence
Riboflavin Mixed 6 studies
Vitamin B12 Disputed 14 studies
Productivity Boost
Productivity Boost
Impact
High effect
B- Goal FitA- Strength of SupportC+ CoverageB+ Formula Quality
Vitamin B12 · 2000 mcgVitamin B12 · 2000 mcgVitamin B6 · 10 mg

High-dose B12 with several B vitamins may support energy metabolism when nutrient status is low. Productivity benefits are most likely when B12 status is low rather than as an acute stimulant effect.

The 2,000 mcg sublingual liquid is potent and absorption-focused, but it uses cyanocobalamin. Additional B vitamins broaden foundational support without creating an acute productivity effect.

Study evidence
Vitamin B12 Supportive 15 studies
Vitamin B12 No effect 17 studies
Hair Health
Hair Health
Impact
High effect
C+ Goal FitB Strength of SupportC CoverageB Formula Quality
Biotin · 300 mcg

Vitamin B12 and biotin address two deficiency-related contributors to shedding and keratin production. The formula is most likely to help when one of those nutrients is inadequate.

Sublingual liquid delivery is practical, but cyanocobalamin is not a preferred bioactive B12 form and the biotin amount is moderate. The remaining B vitamins support general metabolism without adding strong, separate hair-growth evidence.

Study evidence
Biotin Supportive 4 studies
Vitamin B12 Disputed 17 studies

Ingredients

IngredientAmount per serving
Vitamin B1 (Thiamine Hydrochloride)
 4 mg
Riboflavin (Riboflavin 5'-Phosphate Sodium)
 4 mg
Niacin (Niacinamide)
 20 mg
Vitamin B6 (Pyridoxine Hydrochloride)
 10 mg
Folate
333 mcg DFE
Vitamin B12 (Cyanocobalamin)
 2000 mcg
Biotin
300 mcg
Pantothenic Acid (Dexpanthenol)
 30 mg
Gluten Free Adults 18–50 Vegan Kosher Dairy Free Sugar Free Vegetarian
Report overview
Vitamin B12 (Cyanocobalamin) · 2000 mcg OverallScore75
F Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyA+ Value

A high B12 dose and sublingual liquid delivery provide strong potency and absorption-focused convenience. Cyanocobalamin is clearly disclosed but is not a preferred bioactive form. The formula delivers B12 very cost efficiently and includes several additional B vitamins.

View ingredientView products
Biotin · 300 mcg OverallScore59
B+ Active Ingredient Quality & BioavailabilityF Dose, Safety & Label TransparencyC Value

Biotin is clearly disclosed at a low amount in a broader liquid B-complex. The liquid format is favorable for delivery, but the label does not confirm the active d-isomer. The other B vitamins justify a neutral value view even though the biotin dose is not targeted to hair or nail support.

View ingredientView products
Vitamin B5 (Dexpanthenol) · 30 mg OverallScore57
B+ Active Ingredient Quality & BioavailabilityD+ Dose, Safety & Label TransparencyF Value

Dexpanthenol is a bioavailable provitamin form that converts to pantothenic acid, though it is not pantethine. The 30 mg serving meets basic needs but falls below a high-potency B5 range. The cost per standardized 500 mg amount is poor for this form and dose.

View ingredientView products
Loading alternative details
76 Performance

Skin Nails & Hair 2

MegaFood
The ingredient profile is a stronger or better-balanced alternative to the original B-complex. Vitamin C, natural-form vitamin E, active vitamin B6, chelated zinc, selenium, biotin, and nettle create a strong beauty-focused nutrient formula. Most forms are favorable and the nettle amount is substantial, but its plant part and preparation are not stated.
75 Performance

Max B-ND

Premier Research Labs
The ingredient profile is a stronger or better-balanced alternative to the original B-complex. Three bioactive vitamin B12 forms, folinic acid, active riboflavin, and P-5-P give the liquid strong form quality with mostly moderate dosing. The high folate amount needs deliberate use, and the short supply is expensive despite the refined formula.
67 Performance

Raw B-Complex

Garden of Life Vitamin Code
The ingredient profile is a stronger or better-balanced alternative to the original B-complex. A complete B-vitamin profile with methylcobalamin offers useful metabolic support at mostly moderate amounts. Unspecified vitamin forms and opaque fruit, vegetable, probiotic, and enzyme blends reduce transparency and add uncertain value.
81 Budget

B-Complex with Folic Acid plus Vitamin C

Nature's Bounty
The lower serving cost makes this a more economical way to cover overlapping B vitamins. The broad B-complex provides practical daily coverage at a very low serving cost. Conventional vitamin forms and duplicated thiamine entries limit form quality and label clarity, but the doses are generally reasonable.
79 Budget

Sublingual Liquid B Complex

Nature's Bounty
The lower serving cost makes this a more economical way to cover overlapping B vitamins. A liquid B-complex provides related nutrients at generally useful amounts. Active riboflavin is a strength, while cyanocobalamin and pyridoxine are less-preferred forms.
69 Value

Liquid Collagen Complex Healthy Hair Skin & Nails Delicious Grape Flavor

RejuviCare
The combination of formulation quality and serving cost provides better practical value than the original. Biotin and pantothenic acid provide a beauty-focused nutrient base, but the collagen amount is far below common gram-level servings. The liquid is affordable, yet its headline structural ingredient is unlikely to provide much practical depth.
71 Value

Hairfluence

ZHOU
The combination of formulation quality and serving cost provides better practical value than the original. MSM, collagen, keratin, vitamin C, and biotin provide a broad hair-support concept, but the structural ingredients are modest and the vitamin A amount is fairly aggressive. Mixed aggregate satisfaction and a middling serving cost limit confidence in practical value.
63 Value

Anti-Fatigue

Kroeger Herb Products Co.
The combination of formulation quality and serving cost provides better practical value than the original. The formula provides vitamin C and several B vitamins in stated amounts, but very high pantothenic acid and B12 doses create an unbalanced profile. An unspecified licorice amount, limited review volume, and incomplete label details add meaningful uncertainty.
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Sources

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

  1. The Infatuation With Biotin Supplementation: Is There Truth Behind Its Rising Popularity? A Comparative Analysis of Clinical Efficacy versus Social Popularity.
    Soleymani T; Lo Sicco K; Shapiro J · Journal of drugs in dermatology : JDD · 2018
    Narrative reviewHair Health forBiotin
  2. Vitamins A, B, C, and D: A Short Review for the Dermatologist.
    Coerdt KM; Goggins CA; Khachemoune A · Alternative therapies in health and medicine · 2021
    Narrative reviewHair Health forBiotin
  3. Low serum biotinidase activity in children with valproic acid monotherapy.
    Schulpis KH; Karikas GA; Tjamouranis J; Regoutas S; Tsakiris S · Epilepsia · 2001
    Clinical trial125 participantsHair Health forBiotin
  4. The Role of Sesbania grandiflora-Derived Biotin and Bambusa arundinacea-Derived Silica Extracts in Promoting Hair, Skin, and Nail Health: A Randomized, Double-Blind, Placebo-Controlled Clinical Study.
    Patel MN; Maheshvari J; Patel N · Cureus · 2025
    Randomized trial105 participantsHair Health forBiotin
  5. Physicochemical properties of and volatile compounds in riboflavin fortified cloudy apple juice; study of its effect on job fatigue among Egyptian construction workers.
    Fouad S; Ibrahim GE; Hussein AMS; Ibrahim FA; El Gendy A · Heliyon · 2021
    Non-randomized trialEnergy forRiboflavin
  6. Vitamin B status in patients with chronic fatigue syndrome.
    Heap LC; Peters TJ; Wessely S · Journal of the Royal Society of Medicine · 1999
    Case-control study30 participantsEnergy forRiboflavin
  7. B-vitamins, related vitamers, and metabolites in patients with quiescent inflammatory bowel disease and chronic fatigue treated with high dose oral thiamine.
    Bager P; Hvas CL; Hansen MM; Ueland P; Dahlerup JF · Molecular medicine (Cambridge, Mass.) · 2023
    Observational studyEnergy forRiboflavin
  8. Metabolic features of chronic fatigue syndrome.
    Naviaux RK; Naviaux JC; Li K; Bright AT; Alaynick WA; Wang L; Baxter A; Nathan N; Anderson W; Gordon E · Proceedings of the National Academy of Sciences of the United States of America · 2024
    Case-control study84 participantsEnergy forRiboflavin
  9. Effectiveness of Riboflavin in Inherited Metabolic Diseases: A Systematic Review
    Bregje Jaeger, Nina N Stolwijk, Femke Aaldering, Charlotte A Ruys, Marije Smits, Nicole I Wolf, Carla E M Hollak, Annet M Bosch · Journal of Inherited Metabolic Disease · 2026
    Systematic review381 studies pooledEnergy forRiboflavin
  10. 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
  11. 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
  12. 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
  13. 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
  14. Vitamin B12 Deficiency: Common Questions and Answers.
    Patel H; McGuirk R · American family physician · 2025
    Narrative reviewEnergy forVitamin B12
  15. 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
  16. 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
  17. 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
  18. 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
  19. 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
  20. 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
  21. 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
  22. 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
  23. 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
  24. 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
  25. 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
  26. 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
  27. 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
  28. 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
  29. 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
  30. 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
  31. 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
  32. 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
  33. 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