Vitamin B12

15 benefits mapped to clinical evidence across supplements.

Serves the goals:Bone & Joint Cardiovascular Cognition Energy Essential Health

Benefit Evidence

Nutrition source

Strong

B12 status + homocysteine

Anemia/toxicity reduction +MMA

B12 intake/absorption changes

27,450 people

Heart health

Strong

Hcy↓, vessel function↑

Hcy↓, plaque/events↓

54,291 people

Wellbeing

Strong

B12 status +44%

Homocysteine/MMA ↓

Cognition/pain improved

26,406 people

Nerve health

Strong

Symptom relief, +33% nerve

Nerve function, B12↑ homocysteine↓

12,311 people

Pregnancy support

Strong

Pregnancy support: B12, folate

+23.8% pregnancies

Maternal status, lower anemia

19,222 people

Mental clarity

Strong

Memory+executive

B12↑,Hcy↓

Brain atrophy↓40%

4,380 people

Energy & Fatigue

Strong

MS fatigue↓ 2-4w

B12 biomarkers↑, anemia↓

Exercise fatigue↓ +26%

3,902 people

Endurance

Strong

Endurance: +25.8% time

Endurance: +36% motor

Endurance: +1.97 ALSFRS-R

3,305 people

Memory

Strong

Memory + B12/Hcy

Executive/short-term recall

4,145 people

Focus & concentration

Strong

Attention/memory: +0.35

Homocysteine↓; cognition↑

2,159 people

Immune support

Moderate

Immune markers + B12

Inflammation ↓, antibodies ↑

1,826 people

Mood balance

Moderate

Mood balance: lower symptoms

Mood balance: +4 HDRS / 34% tHcy

Mood balance: less relapse

1,714 people

Bone health

Moderate

BMD ↑4.4% / fractures ↓76.7%

Bone resorption ↓33% / CTX

1,344 people

Skin health

Moderate

Better skin severity

Less itching/pain

505 people

Metabolism

Moderate

Insulin resistance +26.7%

HbA1c −1.2%

Lactate/ammonia ↓

1,244 people

Main Effects

Nutrition source

B12 status + homocysteine

Anemia/toxicity reduction +MMA

B12 intake/absorption changes

Strong

27,450

Heart health

Hcy↓, vessel function↑

Hcy↓, plaque/events↓

Strong

54,291

Wellbeing

B12 status +44%

Homocysteine/MMA ↓

Cognition/pain improved

Strong

26,406

Nerve health

Symptom relief, +33% nerve

Nerve function, B12↑ homocysteine↓

Strong

12,311

Pregnancy support

Pregnancy support: B12, folate

+23.8% pregnancies

Maternal status, lower anemia

Strong

19,222

Mental clarity

Memory+executive

B12↑,Hcy↓

Brain atrophy↓40%

Strong

4,380

Energy & Fatigue

MS fatigue↓ 2-4w

B12 biomarkers↑, anemia↓

Exercise fatigue↓ +26%

Strong

3,902

Endurance

Endurance: +25.8% time

Endurance: +36% motor

Endurance: +1.97 ALSFRS-R

Strong

3,305

Memory

Memory + B12/Hcy

Executive/short-term recall

Strong

4,145

Focus & concentration

Attention/memory: +0.35

Homocysteine↓; cognition↑

Strong

2,159

Immune support

Immune markers + B12

Inflammation ↓, antibodies ↑

Moderate

1,826

Mood balance

Mood balance: lower symptoms

Mood balance: +4 HDRS / 34% tHcy

Mood balance: less relapse

Moderate

1,714

Bone health

BMD ↑4.4% / fractures ↓76.7%

Bone resorption ↓33% / CTX

Moderate

1,344

Skin health

Better skin severity

Less itching/pain

Moderate

505

Metabolism

Insulin resistance +26.7%

HbA1c −1.2%

Lactate/ammonia ↓

Moderate

1,244

Similar by evidence

Supplements the same benefits carry qualifying findings for — a fact about the evidence graph, not a recommendation to swap.

Multivitamin

Shares 12 benefits: bone health, endurance, energy & fatigue, focus & concentration

Vitamin B6

Shares 11 benefits: energy & fatigue, focus & concentration, heart health, immune support

Riboflavin

Shares 10 benefits: energy & fatigue, focus & concentration, heart health, immune support

Iodine

Shares 9 benefits: bone health, energy & fatigue, focus & concentration, immune support

Vitamin D

Shares 9 benefits: bone health, energy & fatigue, heart health, immune support

Acetyl-L-Carnitine

Shares 9 benefits: endurance, energy & fatigue, focus & concentration, heart health

Products with Vitamin B12

Search all

1325 products whose verified label declares Vitamin B12 — not every bottle that mentions it in a title.

MiraLAX

MiraFIBER Gummies, from The Makers of MiraLAX, Vegan Formula, 8g Per

Includes 2g Added Sugars 2 g · Niacin (as niacinamide) 40 mg · Vitamin B6 (as pyridoxine hydrochloride) 4 mg +3 more

$15.99Dietary Fibers

Align

Align Probiotic Bloating Relief + Food Digestion, Probiotics

Vitamin B12 (as cyanocobalamin) 2.4 mcg · Bifidobacterium longum subsp. longum 35624™+ 10 mg · DIGEZYME® Multi-enzyme Complex 23 mg +1 more

$29.98Probiotics

MiraLAX

MiraFIBER Gummies, from The Makers of MiraLAX, 8g Per Serving, with B

Includes 1g Added Sugars · Vitamin E (as dI-Alpha-Tocopheryl Acetate) 13.6 mg · Niacin (as Niacinamide) 40 mg +5 more

$15.97Dietary Fibers

Force Factor

Force Factor Total Beets Ultimate Heart Health for Blood Pressure

Niacin 20 mg · Vitamin B6 4 mg · Vitamin B12 50 mcg +6 more

$39.50Herbal Supplements

Cheers

Cheers Restore

Vitamin C (as ascorbic acid) · Vitamin E (as dl-alpha tocopheryl acetate) · Thiamin (vitamin B1) (as thiamin HCI) +8 more

$34.99Milk Thistle

Garden of Life

Garden of Life Vitamin Code Raw B-12

Vitamin B12 1000 mcg · Raw Probiotic & Enzyme Blend 60 mg · Lipase 0 NP +37 more

$13.29B12

Being studied right now

Recruiting clinical trials registered on ClinicalTrials.gov. A trial in progress has no result yet — this is what the field is asking, not what it found.

Vitamin B12 Absorption StudyVitamin B12 · Healthy Volunteers · 12 participants planned · ClinicalTrials.govRecruiting Effect of a Food Intervention With a Prebiotic Alone or Combined With B-vitamins on Gut Microbiota Diversity, Inflammation and Mental Health Outcomes in Older Adults (GutFood)Vitamin B12 · Biomarkers of B-vitamin Status and Gut Microbiome Composition · 84 participants planned · ClinicalTrials.govRecruiting A Dietary Study for People With Clonal HematopoiesisVitamin B12 · Clonal Hematopoiesis · 36 participants planned · ClinicalTrials.govRecruiting