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Vitamin B12 pour Age-Related Cognitive Decline

B

Combined B12 and folate supplementation slowed brain atrophy rate in MCI patients compared to placebo. Homocysteine reduction appears to be the primary mechanism linking B12 status to cognitive preservation.

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B

En conclusion

Combined B12 and folate supplementation slowed brain atrophy rate in MCI patients compared to placebo. Homocysteine reduction appears to be the primary mechanism linking B12 status to cognitive preservation.

Key Study Findings

Review
Vitamin B12 deficiency among older adults and its associations with geriatric syndromes.
Dose: None vs: None Outcome: None Effet: None None

Population: older adults with vitamin B12 deficiency and geriatric syndromes

Meta-Analysis
Associations between Diet and Cognitive Function in Stroke Survivors: A Systematic Review and Meta-analysis.
Dose: None vs: Standard care or placebo Outcome: Global cognition in stroke survivors Effet: SMD=0.62 (energy-protein); SMD=-0.40 (B-vitamins) 0.009 (protein); 0.02 (B-vit)

Population: Adult stroke survivors (20 trials + 14 observational)

Controlled Clinical Trial 32 weeks
Vitamin B12 supplementation attenuates endoplasmic reticulum stress and neuronal cell death in the cerebral cortex …
Dose: 50 ug/kg diet vs 25 ug/kg diet vs: HFHS diet without extra B12 Outcome: ER stress and neuronal cell death in cerebral … Effet: None None

Population: Male C57BL/6J mice on high-fat high-sucrose diet

Other
Estimating effects of serum vitamin B12 levels on psychiatric disorders and cognitive impairment: a Mendelian …
Dose: None vs: None Outcome: Effect of serum B12 on psychiatric disorders (MR) Effet: OR 1.02 [1.00-1.04] for depression per SD increase 0.11 (depression); 0.39 (educa

Population: General population (Mendelian randomization, large GWAS)

Systematic Review
Impact of Vegan and Vegetarian Diets on Neurological Health: A Critical Review.
Dose: None vs: None Outcome: Neurological health outcomes Effet: None None

Population: None

Review
Unlocking the cellular mystery: how proton pump inhibitors may alter the dementia landscape.
Dose: None vs: None Outcome: Dementia risk with PPI use Effet: None None

Population: PPI users and dementia risk (review)

Key Statistics

12

Études

2800

Participants

Positive

B

Note

Referenced Papers

Science translational medicine 2024 12 citations
Molecular and cellular … 2023 8 citations
Nutrients 2022 76 citations
Vitamins and hormones 2022 28 citations
Current nutrition reports 2022 25 citations
International journal of … 2022 23 citations
Journal of Alzheimer's … 2018 281 citations
American family physician 2017 282 citations
Annual review of … 2016 432 citations
Annals of Indian … 2015 1 citations
Journal of clinical … 2012 54 citations
The Practitioner 2010
Journal of Alzheimer's … 2006 37 citations
Neurology India 2004 71 citations
The Cochrane database … 2003 263 citations
Current opinion in … 1998 30 citations

Dosage & Usage

mg = milligrams · mcg = micrograms (1,000× smaller) · IU = International Units

Posologies couramment utilisées

general:
2.4 mcg/day (RDA)
deficiency:
1,000-2,000 mcg/day
cognitivesupport:
500-1,000 mcg/day

Limite supérieure : No established UL (water-soluble, low toxicity)

Posologies étudiées dans la recherche

Posologie Durée Effet N
None -- Positive --
None -- Mixed --
50 ug/kg diet vs 25 ug/kg diet 32 weeks Positive --
None -- Neutral --
None -- Mixed --
None -- Negative --
None -- Mixed --
None -- Positive --

Moment optimal de prise : Morning, on empty stomach for better absorption (sublingual)

Safety & Side Effects

Effets indésirables signalés

  • Generally very well-tolerated
  • Rare: acne-like eruptions at high doses
  • Injection site reactions (injectable form)

Interactions connues

  • Metformin (reduces B12 absorption)
  • Proton pump inhibitors (reduce B12 absorption)
  • Colchicine (reduces B12 absorption)

Apport maximal tolérable : No established UL (water-soluble, low toxicity)

Consultez toujours votre professionnel de santé avant de commencer tout complément alimentaire.Consultez toujours votre professionnel de santé avant de commencer tout complément alimentaire.

Frequently Asked Questions

Does Vitamin B12 help with Age-Related Cognitive Decline?
Based on 12 studies with 2,800 participants, there is moderate evidence from clinical studies that Vitamin B12 may support Age-Related Cognitive Decline management. Our evidence grade is B (Good Evidence).
How much Vitamin B12 should I take for Age-Related Cognitive Decline?
Studies have used various dosages. A commonly studied range is 2.4 mcg/day (RDA). Always consult your healthcare provider before starting any supplement regimen.
Are there side effects of Vitamin B12?
Reported side effects may include Generally very well-tolerated, Rare: acne-like eruptions at high doses, Injection site reactions (injectable form). Most side effects are mild and dose-dependent. Consult your doctor if you experience any adverse reactions.
How strong is the evidence for Vitamin B12 and Age-Related Cognitive Decline?
We rate the evidence as Grade B (Good Evidence). This rating is based on 12 peer-reviewed studies with 2,800 total participants. The overall direction of effect is positive.

Related Evidence

Avertissement FDA: Ces déclarations n'ont pas été évaluées par la Food and Drug Administration. Les produits et informations sur ce site ne sont pas destinés à diagnostiquer, traiter, guérir ou prévenir quelque maladie que ce soit. Les notes de preuve présentées sont basées sur notre analyse de la recherche publiée et évaluée par des pairs et ne constituent pas un avis médical. Consultez toujours votre professionnel de santé avant de commencer tout régime de compléments alimentaires.