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128 studies found for:    vitamin B12 deficiency
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Rank Status Study
21 Recruiting Vitamin B12 Supplementation During Pregnancy on Cognitive Development
Conditions: Pregnancy Related;   Vitamin B 12 Deficiency;   Anemia
Interventions: Dietary Supplement: cobalamin;   Dietary Supplement: placebo
22 Completed Holotranscobalamin Remains Unchanged During Pregnancy
Condition: Vitamin B12 Deficiency
Intervention:
23 Completed Relative Bioavailability of Folic Acid and L-5-Methlytetrahydrofolate
Condition: Vitamin B12 Deficiency
Interventions: Dietary Supplement: L-5-methyltetrahydrofolate (Metafolin ®);   Dietary Supplement: folic acid;   Dietary Supplement: Placebo
24 Completed Effect of Toothpaste Fortified With Cyanocobalamin on Vitamin B12 Status
Condition: Cobalamin Deficiency
Interventions: Dietary Supplement: Placebo;   Dietary Supplement: Cyanocobalamin
25 Completed Cobalamin Absorption From Fortified Food
Conditions: Vitamin B-12 Deficiency;   Achlorhydria
Intervention: Other: 14C-B12 fortified bread
26 Completed Effect of Vitamin B12 Supplementation on Glycaemic Control in Uncontrolled Hyperhomocysteinemic Type 2 Diabetic Patients
Conditions: Type 2 Diabetes;   Vitamin B12 Deficiency;   Hyperhomocysteinemia
Intervention: Dietary Supplement: METHYLCOBALAMIN 500 micrograms
27 Active, not recruiting Cracking the Egg Potential: Improving Young Child Nutrition in Ecuador
Conditions: Choline Deficiency;   Vitamin B-12 Deficiency;   Lipids Deficiency;   Amino Acids Deficiency
Intervention: Other: Egg supplementation
28 Completed Vitamin B12 Supplement to Prevent Cognitive Decline
Condition: Cognitive Decline
Interventions: Dietary Supplement: Vitamin B12;   Dietary Supplement: Placebo
29 Completed Oral Vitamin B12 Supplementation and Cognitive Performance in Elderly People
Conditions: Cognitive Decline;   Cognitive Symptoms
Interventions: Behavioral: vitamin B12 supplementation;   Behavioral: vitamin B12 + folic acid combined supplementation
30 Active, not recruiting Vitamin B12, Neurodevelopment and Growth in Nepal
Conditions: Development;   Vitamin Deficiency;   Malnutrition
Intervention: Dietary Supplement: Vitamin B12
31 Completed Vitamin B12 Supplementation During Pregnancy
Conditions: Nutritional Anemia in Mothers.;   Nutritional Anemia in Infants.
Interventions: Dietary Supplement: Vitamin B12;   Dietary Supplement: Placebo
32 Completed
Has Results
Evaluation of Holotranscobalamin as an Indicator of Vitamin B12 Absorption
Condition: Disorder of Vitamin B12
Intervention: Dietary Supplement: Vitamin B12
33 Unknown  Comparison of Vitamin B12 Supplementation to Selective Serotonin Reuptake Inhibitor (SSRI) Versus SSRI Antidepressant Treatment Alone
Condition: Major Depressive Disorder
Intervention: Dietary Supplement: Vitamin B12
34 Completed Postoperative Vitamin Supplementation in Morbidly Obese Patient (VITAAL Study)
Conditions: Obesity;   Vitamin Deficiency
Interventions: Dietary Supplement: Fit For me;   Dietary Supplement: Davitamon
35 Terminated Vitamin B12 Status and Response to Vitamin B12 Supplementation in Patients With Parkinson's Disease
Condition: Parkinson's Disease
Intervention: Dietary Supplement: Vitamin B12 Supplementation
36 Completed The Bread Trial: Effects of Bread Fortified With Folic Acid and Vitamin B12
Condition: Healthy
Intervention: Procedure: consumption of fortified bread
37 Not yet recruiting Developmental Origins of Mental Health Disorders
Condition: Neurodevelopmental Disorders
Intervention: Other: maternal vitamin B12 folate level during pregnancy
38 Completed NAC-003 P.L.U.S. Program (Progress Through Learning Understanding & Support)
Conditions: Early Memory Loss;   Mild Cognitive Impairment;   Alzheimer's Disease;   Vascular Dementia
Intervention: Other: CerefolinNAC®
39 Terminated Examining B12 Deficiency Associated With C677T Mutation on MTHFR Gene in Terms of Commonness and Endothelial Function
Condition: B12 Deficiency Combined With C677T Mutation on MTHFR Gene
Intervention: Dietary Supplement: Vitamin B12 + Folic Acid
40 Completed Interaction of Cobalamin Status With Nitrous Oxide in Relation to Postoperative Cognitive Changes in the Elderly
Conditions: Avitaminosis;   Delirium, Dementia, Amnestic, Cognitive Disorders
Intervention: Drug: general anesthesia

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Study has passed its completion date and status has not been verified in more than two years.