Does Selenium Hair Nails Randomized Trial work?

The current Migaku evidence database contains 2 reusable source documents for Selenium Hair Nails Randomized Trial. This answer focuses on strength of evidence and what the studies can or cannot prove. - In the environment, Se can be found in soils and waters, both in elemental form and in inorganic compounds, as selenides, selenates, and selenites [,,]. [Stachika Nikolina (2026); evidence level 1] - Selenium deficiency has been associated with cardiovascular, endocrine, immune, neurological, and musculoskeletal disorders [,,,,,]. [Stachika Nikolina (2026); evidence level 1] - During intrauterine development, tightly regulated cell proliferation, differentiation, and apoptosis are essential for normal organogenesis, and their disruption may result in congenital anomalies []. [Stachika Nikolina (2026); evidence level 1] - 1 2 3 2 3 1 Selenium (Se) is a trace element and is essential for human health and development. [Stachika Nikolina (2026); evidence level 1] - Accumulating evidence has demonstrated the beneficial effects of oral collagen supplementation in promoting skin rejuvenation []. [Huang Jingjing (2026); evidence level 3] Evidence levels are sorting aids, not final clinical grades. Level 1 usually indicates systematic-review style evidence, level 2 indicates randomized trials or public-health guidance, and lower levels need more cautious wording. This page is educational. People with medical conditions, pregnancy, medication use, or unusual symptoms should ask a qualified clinician before changing supplements, medication, or treatment routines.