Vitamin B12 deficiency
MONDO:0020696A disease characterized by low serum levels of vitamin B12, either inherited or acquired.
Also known as: cobalamin deficiency, hypocobalaminemia, vitamin b12 deficiency
26 clinical trials for this condition and its sub-types, 12 tagged with Vitamin B12 deficiency itself.
Follow this condition to get notified about new trialsWhere it sits in the disease tree
Browse by category →Sub-types of Vitamin B12 deficiency
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Inborn disorder of cobalamin metabolism and transport 1 trial · 3 incl. sub-types
9 sub-types
- Methylmalonic aciduria and homocystinuria 1 trial · 3 incl. sub-types Sub-types →
- Homocystinuria without methylmalonic aciduria 0 trials · 2 incl. sub-types Sub-types →
- Methylmalonic aciduria and/or homocystinuria, cblD type 0 trials · 2 incl. sub-types Sub-types →
- Vitamin B12-responsive methylmalonic acidemia 0 trials · 2 incl. sub-types Sub-types →
- Hereditary intrinsic factor deficiency 1 trial Sub-types →
- Transcobalamin II deficiency 1 trial
- Imerslund-Grasbeck syndrome 0 trials Sub-types →
- Methylmalonic acidemia due to transcobalamin receptor defect 0 trials
- Transcobalamin I deficiency 0 trials
Most studied deeper sub-types
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Can a High-Calorie drink help malnourished kids grow?
Disease control Recruiting nowThis study tests whether daily high-calorie nutritional supplements can improve growth and development in 200 malnourished children aged 1 to 3 years. One group gets the supplements plus nutrition education, while the other gets only education and diet advice. Researchers will me…
Sponsor: Children's Hospital of Chongqing Medical University • Aim: Disease control
Last updated Jun 27, 2026 11:02 UTC
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Could a smaller dose of nutrients protect kids from malnutrition?
Prevention Recruiting nowThis study compares two types of nutrient supplements—small-quantity and medium-quantity—to see if the smaller one works just as well at preventing undernutrition in children aged 6 to 12 months. About 980 infants in Pakistan will receive one of the two supplements daily for 6 mo…
Sponsor: Aga Khan University • Aim: Prevention
Last updated Sep 05, 2026 00:00 UTC
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Scientists launch deep dive into rare metabolic disease MMA
Knowledge-focused Recruiting nowThis study aims to learn more about methylmalonic acidemia (MMA) and related disorders by observing people with these conditions over time. Researchers will track complications, perform tests like blood draws and MRIs, and look for new genetic causes. The goal is to better unders…
Sponsor: National Human Genome Research Institute (NHGRI) • Aim: Knowledge-focused
Last updated Sep 12, 2026 00:00 UTC
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Could Plant-Based hospital drinks be as good as Milk-Based ones? a new study aims to find out
Knowledge-focused Recruiting nowThis pilot study tests whether it's possible to run a larger trial comparing plant-based and animal-based oral nutritional supplements (ONS) in hospital patients at risk of malnutrition. Sixty patients from two Dutch hospitals will be randomly assigned to receive either a soy-bas…
Sponsor: Radboud University Medical Center • Aim: Knowledge-focused
Last updated Aug 13, 2026 00:00 UTC