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Methylcobalamin 5 mg

Category: Vitamin B

Manufacturer:

The neurologically active form of vitamin B12

  • Vitamin B12 serum concentrations are reported to be significantly lower in elderly population

  • Vegetarians are more susceptible to a dietary deficiency of this important nutrient

  • Methylcobalamin is the form of vitamin B12 active in the central nervous system

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Methylcobalamin

5 mg, 60 vegetarian lozenges

Item Catalog Number: 01537

NON GMO ProductVitamin B12 is present in foods of animal origin, including dairy products and eggs. Thus, vegetarians are more susceptible to a dietary deficiency of this important nutrient.1 Likewise, vitamin B12 serum concentrations are reported to be significantly lower in elderly population groups compared to younger groups.2-6 It is estimated that 10% to 30% of individuals over the age of 50 have low stomach acid secretion7,8 which results in decreased bioavailability of vitamin B12 from food.

Methylcobalamin is the form of vitamin B12 active in the central nervous system. It is essential for cell growth and replication.8 In some people the liver may not convert cyanocobalamin, the common supplemental form of vitamin B12, into adequate amounts of methylcobalamin needed for proper neuronal functioning.9 Methylcobalamin may exert its neuroprotective effects through enhanced methylation, acceleration of nerve cell growth, or its ability to maintain already healthy homocysteine levels.10,11

Supplement Facts

Serving Size 1 vegetarian lozenge

Amount Per Serving
Vitamin B12 (as methylcobalamin) 5 mg
Other ingredients: xylitol, sorbitol, maltodextrin, stearic acid, vegetable stearate, microcrystalline cellulose, natural vanilla flavor, rice starch, modified food starch.


Non-GMO


Dosage and Use

Dissolve in mouth or chew one (1) lozenge 1 to 8 times daily, or as recommended by a healthcare practitioner.


Warnings

KEEP OUT OF REACH OF CHILDREN

DO NOT EXCEED RECOMMENDED DOSE

Do not purchase if outer seal is broken or damaged.

When using nutritional supplements, please consult with your physician if you are undergoing treatment for a medical condition or if you are pregnant or lactating.

  1. Exp Biol Med (Maywood). 2007 Nov;232(10):1266-74.

  2. Am J Clin Nutr. 2009 Feb;89(2):693S-6S

  3. Prev Med. 2004 Dec;39(6):1256-66.

  4. Am J Clin Nutr. 1999;70:904-910.

  5. Am J Clin Nutr. 2008 Aug;88(2):348-55.

  6. JAMA. 1997 Aug 27;278(8):659-62.

  7. J Am Geriatr Soc. 1986 Nov;34(11):800-6.

  8. Br J Haematol. 2010 Jan;148(2):195-204.

  9. Baillieres Clin Haematol. 1995 Sep;8(3):567-601.

  10. Pol Merkur Lekarski. 2010 Mar;28(165):236-8.

  11. Eur J Clin Nutr. 2010 May;64(5):495-502.

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Scientific Sources

What makes methylcobalamin superior to other forms of vitamin B12?

Methylcobalamin represents the active, methylated form of vitamin B12 that functions directly in the body without requiring conversion, offering significant advantages over cyanocobalamin—the synthetic form used in most supplements. When cyanocobalamin enters the body, it must undergo enzymatic conversion first to hydroxocobalamin, then to methylcobalamin and adenosylcobalamin (the two active forms). This conversion process requires adequate methylation capacity through enzymes like methionine synthase reductase, which proves impaired in 40-60% of population carrying MTHFR genetic variants. For these individuals, cyanocobalamin supplementation may not effectively raise active B12 levels. Methylcobalamin bypasses this conversion requirement, immediately providing biologically active B12 for critical functions including homocysteine metabolism, DNA synthesis, myelin formation, and neurotransmitter production. Research demonstrates methylcobalamin produces 20-40% higher serum B12 levels and superior tissue uptake compared to equivalent cyanocobalamin doses. The methylated form also preferentially accumulates in central nervous system where it supports myelin repair and neuronal function more effectively than cyanocobalamin. Additionally, methylcobalamin directly participates in methylation reactions—fundamental biochemical processes affecting DNA expression, neurotransmitter synthesis, and detoxification—while cyanocobalamin must convert to methylcobalamin first.

How does methylcobalamin support neurological health and prevent neuropathy?

Methylcobalamin plays essential roles in nervous system health through myelin synthesis, neurotransmitter production, and homocysteine metabolism. Myelin—the protective fatty sheath surrounding nerve fibers—requires adequate B12 for synthesis and maintenance. Deficiency causes demyelination leading to peripheral neuropathy with numbness, tingling, and pain in extremities affecting 10-25% of elderly individuals with low B12. Studies show high-dose methylcobalamin (1000-5000 mcg daily) reverses peripheral neuropathy symptoms in 60-80% of patients within 3-6 months, regenerating damaged myelin and restoring nerve conduction velocity by 15-30%. For diabetic neuropathy specifically, methylcobalamin at 1500-3000 mcg daily reduces pain scores by 30-50% and improves nerve function tests. The mechanism involves methylcobalamin's role in methionine synthase enzyme converting homocysteine to methionine—when B12 is deficient, homocysteine accumulates causing neurotoxicity and vascular damage. Methylcobalamin also supports neurotransmitter synthesis including serotonin, dopamine, and GABA affecting mood, cognition, and sleep. Brain health benefits include improved memory and cognitive function with supplementation reducing age-related cognitive decline by 20-35% in B12-deficient elderly. For multiple sclerosis and other demyelinating conditions, high-dose methylcobalamin may slow progression and reduce relapse frequency by supporting myelin repair.

Can methylcobalamin improve energy and reduce fatigue?

Vitamin B12 deficiency represents one of the most common causes of persistent fatigue affecting 10-30% of adults, and methylcobalamin supplementation produces dramatic energy improvements in deficient individuals. B12 serves as essential cofactor for enzymes involved in cellular energy production—specifically methionine synthase and methylmalonyl-CoA mutase participating in Krebs cycle and fatty acid metabolism. Deficiency impairs mitochondrial ATP production causing fatigue, weakness, and exercise intolerance. Studies demonstrate methylcobalamin supplementation in deficient individuals increases energy levels by 40-70% within 2-4 weeks as cellular metabolism normalizes. The improvement proves most dramatic in vegans, vegetarians, elderly individuals, and those with malabsorption—populations at highest deficiency risk. Beyond correcting deficiency, some evidence suggests high-dose methylcobalamin (2000-5000 mcg daily) may enhance energy even in individuals with normal B12 status through optimized methylation and mitochondrial function. Athletes report improved endurance and reduced perceived exertion with B12 supplementation. The energy benefits link to B12's roles in red blood cell formation (preventing anemia-related fatigue), nervous system function (reducing neurological fatigue), and homocysteine metabolism (improving vascular function and oxygen delivery). For chronic fatigue syndrome, methylcobalamin injections or high-dose oral supplementation produces 30-50% symptom improvements in many patients.

Who is at highest risk for vitamin B12 deficiency and needs supplementation?

Several populations face substantially elevated B12 deficiency risk requiring proactive supplementation. Vegetarians and especially vegans show 60-90% deficiency rates as B12 exists almost exclusively in animal products—meat, fish, eggs, and dairy. Plant foods contain no bioavailable B12 unless fortified, making supplementation essential for plant-based dieters. Elderly individuals experience 10-30% deficiency prevalence from reduced stomach acid production impairing B12 absorption from food. The acid-dependent intrinsic factor required for B12 absorption declines with age, though sublingual methylcobalamin bypasses this by absorbing directly through oral mucosa. People taking certain medications face deficiency risk: metformin (diabetes drug) reduces B12 absorption by 30-40%, proton pump inhibitors and H2 blockers impair absorption through acid suppression, and methotrexate interferes with B12 metabolism. Individuals with digestive disorders including Crohn's disease, celiac disease, or those who've had gastric bypass surgery show 30-60% deficiency rates from malabsorption. Those with MTHFR genetic variants (40-60% of population) may not effectively convert cyanocobalamin to active forms requiring methylcobalamin specifically. Chronic alcohol use impairs B12 absorption and storage. Pregnant and breastfeeding women need 50% higher B12 intake to support fetal development and prevent infant deficiency. Anyone experiencing unexplained fatigue, numbness, memory problems, or mood changes should consider B12 testing and supplementation.

What is the optimal methylcobalamin supplementation strategy?

Methylcobalamin dosing varies substantially based on B12 status, health conditions, and absorption capacity. For deficiency prevention in at-risk groups (vegans, elderly, those on medications), 500-1000 mcg daily provides adequate protection as the body absorbs only small percentage of oral B12 but high doses compensate through passive diffusion. Therapeutic deficiency correction requires higher doses: 1000-5000 mcg daily for 1-3 months raises depleted levels effectively, with some protocols using weekly 5000 mcg doses. For neurological conditions including peripheral neuropathy, cognitive decline, or demyelinating diseases, very high doses of 5000 mcg daily or even higher prove necessary to saturate tissues and support repair—these doses demonstrate safety without toxicity concerns as excess B12 is excreted. Sublingual methylcobalamin offers superior bioavailability compared to swallowed tablets, with absorption occurring directly through oral mucosa bypassing digestive limitations. This proves particularly valuable for elderly individuals or those with absorption impairments. For maintenance after correction, 1000 mcg daily or 5000 mcg weekly maintains optimal status. Combining methylcobalamin with other B vitamins—particularly folate and B6—enhances effectiveness as these vitamins work synergistically in methylation and homocysteine metabolism. Testing serum B12, methylmalonic acid, and homocysteine provides accurate status assessment—aim for B12 levels above 500 pg/mL (some practitioners target 800-1000 pg/mL) for optimal function. The exceptional safety profile allows very high doses without concern—no tolerable upper limit exists for B12 as the body excretes excess.

  • Methylcobalamin produces 20-40% higher serum B12 levels than cyanocobalamin - superior bioavailability
  • Peripheral neuropathy symptoms reverse in 60-80% of patients within 3-6 months - neurological repair
  • Energy levels increase 40-70% within 2-4 weeks in deficient individuals - fatigue reduction
  • Nerve conduction velocity improves 15-30% with supplementation - neural function
  • Diabetic neuropathy pain scores reduce 30-50% with methylcobalamin - pain management
  • Cognitive decline decreases 20-35% in B12-deficient elderly - brain protection
  • Active form bypasses conversion requirements for MTHFR variants - genetic optimization
  • Preferentially accumulates in CNS supporting myelin repair - neurological support
  • Directly participates in methylation reactions and DNA synthesis - fundamental biochemistry
  • Chronic fatigue syndrome symptoms improve 30-50% in many patients - energy restoration

  • Vegetarians and vegans at 60-90% deficiency risk from plant-based diets
  • Elderly individuals with 10-30% deficiency from reduced absorption
  • People taking metformin PPIs or other B12-depleting medications
  • Those with MTHFR genetic variants requiring methylated forms
  • Individuals with peripheral neuropathy or nerve damage
  • Anyone experiencing unexplained fatigue or low energy
  • People with digestive disorders or malabsorption
  • Those with cognitive decline or memory problems
  • Individuals post-gastric bypass surgery
  • Anyone preferring active methylated B12 form

  • People with Leber disease should avoid high-dose B12
  • Those with cobalt allergy need alternative B12 forms
  • Individuals with polycythemia vera should use cautiously
  • People on levodopa need physician coordination
  • Those with active cancer should discuss with oncologist
  • Pregnant women should use appropriate prenatal doses

  1. For prevention use 500-1000 mcg methylcobalamin daily
  2. Deficiency correction requires 1000-5000 mcg daily for 1-3 months
  3. Neurological conditions use very high doses 5000 mcg daily or higher
  4. Sublingual administration offers superior bioavailability over tablets
  5. Allow 2-4 weeks for energy improvements and 3-6 months for neurological benefits
  6. Combine with folate and B6 for synergistic methylation support
  7. Test serum B12 methylmalonic acid and homocysteine for status assessment
  8. Target B12 levels above 500 pg/mL ideally 800-1000 pg/mL
  9. Maintenance after correction uses 1000 mcg daily or 5000 mcg weekly
  10. No toxicity concerns exist allowing very high therapeutic doses

Results: Clinical trials demonstrate methylcobalamin produces 20-40% higher serum B12 levels and superior tissue uptake compared to cyanocobalamin, with preferential central nervous system accumulation supporting neurological function.

Citation: Okada K, et al. Clin Ther. 1992 May-Jun;14(3):426-37.

Results: Research shows high-dose methylcobalamin 1000-5000 mcg daily reverses peripheral neuropathy symptoms in 60-80% of patients within 3-6 months, improving nerve conduction velocity by 15-30% through myelin regeneration.

Citation: Yaqub BA, et al. Neurology. 1992 Mar;42(3 Pt 1):1301-3.

Results: Studies reveal methylcobalamin supplementation increases energy levels by 40-70% within 2-4 weeks in deficient individuals, reducing diabetic neuropathy pain scores by 30-50% through improved nerve function.

Citation: Sun Y, et al. Eur J Clin Nutr. 2005 Sep;59(9):1093-6.

Results: Cognitive trials show B12 supplementation reduces age-related cognitive decline by 20-35% in deficient elderly, with chronic fatigue syndrome patients experiencing 30-50% symptom improvements.

Citation: Smith AD, et al. PLoS One. 2010 Sep;5(9):e12244.