Liquid Methyl B12 Complex 1200 mcg — Liquid (Sublingual), 2 fl oz — Supports Energy Metabolism & Nervous System Health*
Lifesource Vitamins Liquid Methyl B12 Complex 1200 mcg combines bioactive methylcobalamin with complementary B-vitamins (B-1, B-2, B-3, B-5, B-6, Folate) and Vitamin C in a sublingual liquid to support energy metabolism, nervous system health, and healthy homocysteine metabolism. Produced in FDA-registered, GMP-certified facilities for quality assurance.*
Research-Driven & Verified Product.
Explore the clinical research, ingredient science, and global evidence supporting this product below.
Research Promise: At LifeSource Vitamins, our commitment is rooted in research and results. Every benefit below is supported by human clinical studies indexed in the National Institutes of Health (NIH) via PubMed, with full texts available in the National Library of Medicine (NLM) PubMed Central (PMC) when available. In addition, we reference reviews from leading health organizations and insights from top global universities to ensure our guidance aligns with credible science.*
Clinically Studied Benefits
✓ Corrects B-12 deficiency (hematologic & neurologic) — High-dose oral cobalamin was as effective as intramuscular therapy in randomized clinical trials of B-12 deficiency.
NIH/PubMed — Kuzminski, 1998
✓ Raises serum B-12 & improves functional markers — Oral high-dose B-12 increased serum cobalamin and reduced methylmalonic acid/homocysteine versus low dose/placebo (randomized evidence).
NIH/PubMed — Vidal-Alaball, 2005
✓ Homocysteine & brain atrophy (MCI subgroup) — In older adults with mild cognitive impairment and elevated homocysteine, folate+B-6+B-12 slowed whole-brain atrophy vs placebo (double-blind RCT).
NIH/PubMed — Smith, 2010
✓ Cognition in low-folate elders — Three-year folic acid (with stable B-12 status) improved memory and processing speed vs placebo (DB-RCT).
NIH/PubMed — Durga, 2005
✓ Stress & mood in healthy but stressed adults — B-complex formulations reduced perceived stress and improved mood/well-being (randomized, placebo-controlled).
NIH/PubMed — Stough, 2014
Additional / Promising Evidence
✓ Sub-lingual vs standard oral B-12 — Human studies suggest both forms can normalize B-12 markers; head-to-head trials are limited and formulations/doses vary. Use under clinician guidance in deficiency.
NIH/PubMed — Kuzminski, 1998
✓ Homocysteine lowering & major CVD events — Although B-vitamins lower homocysteine, large outcome RCTs did not reduce major cardiovascular events.
NIH/PubMed — HOPE-2, 2006
University-Led & Academic Studies
✓ Corrects B-12 deficiency (hematologic & neurologic) — High-dose oral cobalamin was as effective as intramuscular therapy in randomized clinical trials of B-12 deficiency.
NIH/PubMed — Kuzminski, 1998
✓ Raises serum B-12 & improves functional markers — Oral high-dose cobalamin increased serum cobalamin and reduced methylmalonic acid/homocysteine versus low dose/placebo (randomized evidence).
NIH/PubMed — Vidal-Alaball, 2005
✓ Homocysteine & brain atrophy (MCI subgroup) — In older adults with mild cognitive impairment and elevated homocysteine, folate+B-6+B-12 slowed whole-brain atrophy vs placebo (double-blind RCT).
NIH/PubMed — Smith, 2010
✓ Cognition in low-folate elders — Three-year folic acid (with stable B-12 status) improved memory and processing speed vs placebo (DB-RCT).
NIH/PubMed — Durga, 2005
✓ Stress & mood in healthy but stressed adults — B-complex formulations reduced perceived stress and improved mood/well-being (randomized, placebo-controlled).
NIH/PubMed — Stough, 2014
Global Evidence & Reviews
✓ NIH ODS — Vitamin B12 — Health-professional fact sheet on roles, deficiency, supplementation, and safety.
NIH/ODS — Vitamin B12
We monitor research from leading institutions —
Harvard, Johns Hopkins, Mayo Clinic, Cleveland Clinic, Cambridge, Oxford, Stanford, Yale, Tufts, University of Florida, Oregon State University – Linus Pauling Institute, Columbia, Cornell, Ohio State — to align with credible science.*
Key Ingredients
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Vitamin B-12 (Methylcobalamin) — Bioactive form supporting energy metabolism, nervous system health, red blood cell formation, and healthy homocysteine metabolism. (NIH/PubMed — Kuzminski, 1998; NIH/PubMed — Smith, 2010)
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Vitamin B-6 (Pyridoxine) — Cofactor in neurotransmitter synthesis; supports mood and brain health (human data). (NIH/PubMed — Stough, 2014)
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Folate (Vitamin B-9) — Required for one-carbon metabolism and DNA synthesis; with B-12 helps normalize homocysteine. (NIH/PubMed — Durga, 2005)
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Vitamin C — Antioxidant support and cofactor functions (supportive nutrient).
Brief Benefit Bullets
- Powers energy metabolism for daily vitality*
- Supports nervous system health & myelin integrity*
- Promotes red blood cell formation to help prevent megaloblastic anemia*
- Helps maintain healthy homocysteine metabolism*
- Supports mental clarity in B-12–deficient individuals*
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3rd-party lab tested for purity & potency
Suggested Use
Place 1 dropper (1 mL) under the tongue daily; hold for ~30 seconds before swallowing, or as directed by your healthcare professional. Do not exceed recommended dose. If pregnant, nursing, taking medications, or have a medical condition, consult your physician.*
Product Specifications
• Serving Size — 1 Dropper (1 mL)
• Servings Per Container — 60
• Form — Liquid (Sublingual)
• Free From — Non-GMO, gluten-free, vegan*
• Quality — Third-party tested for identity, potency & purity
LifeSource Vitamins — Proudly American — Since 1992
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
Liquid Methyl B12 Complex (sublingual) — supports energy metabolism, nervous system & healthy homocysteine. Clinically Studied Ingredients — NIH/PubMed!*
