Vitamin deficiency disorder
MONDO:0024298A disorder that is caused by the deficiency of a vitamin. The deficiency may result from either suboptimal vitamin intake or conditions that prevent the vitamin's use or absorption in the body. Representative examples include beriberi caused by thiamine deficiency, scurvy caused by vitamin C deficiency, and rickets caused by vitamin D deficiency.
Also known as: avitaminosis, vitamin deficiency, vitamin deficiency disorder, Avitaminoses, deficiencies, vitamin, deficiency, vitamin, vitamin deficiencies
146 clinical trials for this condition and its sub-types, 9 tagged with Vitamin deficiency disorder itself.
Follow this condition to get notified about new trialsWhere it sits in the disease tree
Browse by category →Sub-types of Vitamin deficiency disorder
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Vitamin D deficiency 89 trials
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Vitamin B deficiency 0 trials · 17 incl. sub-types
3 sub-types
- Vitamin B12 deficiency 12 trials · 15 incl. sub-types Sub-types →
- Beriberi 2 trials Sub-types →
- Pyridoxine deficiency anemia 0 trials
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Scurvy 13 trials
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Vitamin A deficiency 9 trials
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Inborn vitamin metabolic disorder 0 trials · 7 incl. sub-types
5 sub-types
- Disorders of vitamin D metabolism 0 trials · 3 incl. sub-types Sub-types →
- Inborn disorder of cobalamin metabolism and transport 1 trial · 3 incl. sub-types Sub-types →
- Cerebral folate deficiency 1 trial
- Familial isolated deficiency of vitamin E 1 trial
- Neurodegenerative syndrome due to cerebral folate transport deficiency 1 trial
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Nutritional biotin deficiency 0 trials
Most studied deeper sub-types
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Custom vitamins for bariatric patients: do they outperform standard multis?
Disease control CompletedThis study tests whether specialized bariatric supplements (Elan Believe, Compass, Supreme) prevent vitamin and mineral deficiencies after weight-loss surgery better than standard over-the-counter multivitamins. Over 600 adults undergoing sleeve gastrectomy, gastric bypass, or on…
Phase 4 • Sponsor: General Committee of Teaching Hospitals and Institutes, Egypt • Aim: Disease control
Last updated Sep 04, 2026 00:00 UTC
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Can creatine boost vegan athletes? new study tests the idea
Disease control CompletedThis study looked at whether taking creatine supplements can improve physical performance and body composition in people who follow a vegan diet. Twenty healthy, active vegans took either creatine or a placebo for four weeks while eating a vegan diet. Researchers measured sprint …
Sponsor: Universidad Francisco de Vitoria • Aim: Disease control
Last updated Jun 27, 2026 12:00 UTC
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Daily vitamin d may slash lung risks in kids with sickle cell disease
Disease control CompletedThis study tested whether taking vitamin D every day could reduce lung complications in children and teens with sickle cell disease. Lung problems like infections, asthma attacks, and acute chest syndrome are major causes of illness and death in this condition. Researchers gave d…
Phase 2 • Sponsor: Columbia University • Aim: Disease control
Last updated Jun 27, 2026 07:51 UTC
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Army study reveals how calorie shortages impact muscle and fuel use
Knowledge-focused CompletedThis study looked at how different levels of calorie shortage affect protein use in the body and how the body burns carbs during exercise. Thirty healthy adults followed a controlled diet and exercise plan. Researchers measured muscle protein and fuel use to understand how the bo…
Sponsor: United States Army Research Institute of Environmental Medicine • Aim: Knowledge-focused
Last updated Jun 27, 2026 08:12 UTC
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New score could simplify vitamin plans after gastric bypass
Knowledge-focused CompletedThis study tested a new scoring system called BARSCORE to predict how much vitamin, mineral, and protein supplementation patients need after bariatric surgery. Researchers analyzed data from over 4,500 patients who had surgery between 2015 and 2021. The goal was to create a simpl…
Sponsor: Hospital Universitari de Bellvitge • Aim: Knowledge-focused
Last updated Jun 27, 2026 08:02 UTC
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Do prenatal vitamins really help? new study aims to find out
Knowledge-focused CompletedThis study followed 1,500 women in higher-income countries who chose to take multivitamins or folic acid before or during pregnancy. Researchers tracked pregnancy outcomes like full-term birth, anemia, preeclampsia, and baby birth weight. The goal is to gather real-world data on …
Sponsor: Bayer • Aim: Knowledge-focused
Last updated Jun 26, 2026 14:03 UTC