Recently, there has been a steep increase in the number of maternal folic acid supplementation studies with the occurrence of CHDs as the primary health outcome; several studies have demonstrated positive associations, whereas others have not.
The theoretically beneficial effects of coenzyme Q10 (Q10) on exercise-related oxidative stress and physical capacity have not been confirmed to our knowledge by interventional supplementation studies.
The objective of the present study was to identify the most efficacious dose of Q-Gel for use in supplementation studies.
Epidemiological evidence indicates that natural antioxidants reduce the risk of heart disease, but, so far, supplementation studies have failed to confirm any protective effects of these compounds against cardiovascular disease.
Conclusions: To understand the results of recent glutamine supplementation studies in the critically ill, the relevance of plasma glutamine levels must be under stood.
However recent negative supplementation studies in respiratory [54, 55] and cardiovascular disease [56] tend to support the Institute of Medicine's position.
Based on isoprenoid supplementation studies, it could be concluded that impairment of geranylgeranylated Rho and Rac GTPase function is most likely responsible for lovastatin-induced cytoskeletal changes in lens epithelial cells.
However, in randomized, blinded, controlled prospective trials in humans, selenium supplementation has not succeeded in reducing the incidence of any disease, nor has a meta-analysis of such selenium supplementation studies detected a decrease in overall mortality.
Milk supplementation studies designed to assess effects on bone mineralization among peri-menarcheal girls have generally not found effects on age at menarche [38], [39].
The study was conducted in children that were less severely stunted than in most previous micronutrient supplementation studies, and who may have benefited from recent efforts to fortify staple food with micronutrients.
However, the results are not fully consistent and even in Se supplementation studies of critically ill patients with low circulating Se levels and grossly disturbed TH metabolism, a similar lack of clear effects was reported [17].
