Researchers at Tufts University have completed the first study examining levels of vitamin D in brain tissue, specifically in adults who suffered from varying rates of cognitive decline. They found that members of this group with higher levels of vitamin D in their brains had better cognitive function. [...]

L-arginine combined with vitamin C can improve physical performance, muscle strength, endothelial function, and fatigue in adults with long Covid and should be considered a treatment option to relieve persistent symptoms, according to a study published in the journal Nutrients.

There may be a potential role for nutritional supplements in the treatment of hair loss, according to a new review published online in JAMA Dermatology.