Active clinical trials for "Avitaminosis"

Title Executive team Research line Summary Research problem Justification Literature review Objectives Materials and methods Dissemination of knowledge generated Schedule of activities Budget References Annexes

The aim of this 6 months study is to evaluate the metabolic effects of 400.000-600.000 IU of vitamin D supplementation in subjects with type 2 diabetes and hypovitaminosis D. The main hypothesis is that subjects with low levels of 25-OH-vitamin D will benefit from supplementation with cholecalciferol in sufficient doses to optimize serum levels.

To investigate the optimal initial and maintenance doses of vitamin D2 supplementation for the treatment of vitamin D insufficiency in Thai adults, and to determine the prevalence of and risk factors for hypovitaminosis D among Thai adults.

The purpose of this study is to evaluate the effect of vitamin D supplementation on the pain score of primary dysmenorrhea. Our hypothesis is that by normalizing vitamin D level could help improve pain score of women who have primary dysmenorrhea.

The clinical finding of skin rashes which appear after a vitamin C deficiency in Long Term Care Unit leads us to believe that the institutional diet could predispose to this kind of deficiency. Vitamin C has a key role into the struggle against oxidant stress and is involved into the connective tissue formation of the skin and the vascular endothelium. Vitamin C deficiency affects currently 15 to 25% of the elderly over 65 years old reaching 15% women and 20% men after 65 according to Johnston and Al. It concerns mainly the people in precarious situations (persons without fixed homes, ethyl-smoking persons) and elderly over 65 years. Hypovitaminosis C, defined by plasma level between 5 mg/L and 15 mg/L (28.41 to 85.23 µmol/L), is currently undiagnosed, especially with people with a risk of food deficiency and its prevalence increases with age. The treatment consists of a daily oral supplementation of 1 gram of vitamin C/d for 15 days. A minimum intake of 10 mg/D of vitamin C is required to prevent scurvy and maintain a total pool of 350 mg. A diet modification by a systematic intake of 2 glasses of fresh orange juice and/or the consumption of raw fruits and vegetables would prevent the appearance of scurvy.

The purpose of the study is to determine whether vitamin D supplementation in patients with hypovitaminosis D can decrease nonunion (failure to heal) incidence in patients with fractures of the humerus, femur, or tibia. The central hypothesis of the study is that vitamin D supplementation in patients with fractures and hypovitaminosis D will decrease the risk of nonunion compared to placebo treatment.

The goal of this observational study is to verify the role of adipose tissue in determining the vitamin D serum level after monthly oral administration in subjects with vitamin D deficiency. The main questions it aims to answer are: Adipose tissue represents a storage environment for vitamin D or it's an environment where vitamin D is sequestered and no longer released On the other hands, it's possible to verify whether the adipose tissue carries out a bi-modal activity towards vitamin D If adipose tissue exerts a bi-modal effect, it is possible to identify a specific threshold between the two effects Participants will undergo anthropometric measurements (height, weight, waist/hip ratio waist circumference) at baseline and after 6 months of intake of cholecalciferol 50,000 IU/month

Stroke is a common, serious and restrictive global health problem. Restricting the activities of daily living of stroke patients impairs patients' ability to pay attention to oral hygiene. Facial paresis and tongue weakness due to stroke may cause a decrease in the control of dental prostheses and the removal of food residues in the oral cavity. Food residues and saliva contaminated with bacteria as a result of poor oral hygiene can result in pneumonia when aspirated due to oropharyngeal dysphagia. In the literature, it has been shown that there are significant relationships between periodontal health and vitamin D and calcium intake, and that dietary supplementation with calcium and vitamin D can improve periodontal health, increase bone mineral density in the mandible, and inhibit alveolar bone resorption. In line with all these data, our hypothesis in this study is to investigate the relationship between oral health and vitamin D levels in stroke patients in rehabilitation units.

The purpose of this study is to correlate the findings of an early study with current data.

An adequate micronutrient status during fetal life and infancy is important for optimal development. Dietary practices during pregnancy, lactation and infancy vary among populations and there is today no clear agreement on what constitutes the best diet, including micronutrient supplementation, during this period. There is consequently no clear agreement on what constitutes an optimal biochemical micronutrient status in mothers and infants. Due to substantial physiological changes in plasma volume, hormones, transport proteins and organ function during these periods, the ordinary reference levels or cut off levels used for biochemical assessment of micronutrient status are unsuited to these groups of patients. The objective of the study is to establish cut off levels for important vitamins and trace elements during pregnancy, lactation and infancy in order to ensure an optimal infant neurodevelopment and to study how micronutrient status influence the immunosystem.