Selenium is an essential trace mineral involved in antioxidant defense, thyroid function, and immune health. It is a cofactor for glutathione peroxidase, a key antioxidant enzyme that protects cells from oxidative stress.
For physically active individuals, selenium supports recovery by reducing oxidative damage from exercise. It also plays a role in maintaining thyroid hormone metabolism, which influences energy production and metabolic rate.
Athletes with high training volumes may have increased needs for selenium due to its role in combating exercise-induced oxidative stress.
Synonyms:
None widely used; sometimes labeled as sodium selenite or selenomethionine (forms in supplements).
Benefits:
- Supports antioxidant defenses and recovery
- Promotes healthy thyroid function
- Aids immune system function
- May reduce muscle inflammation post-exercise
Sources:
Found in Brazil nuts, seafood, eggs, sunflower seeds; also available in supplement form.
Observations:
Often included in multivitamins or as standalone capsules. The safe upper limit is around 400 mcg/day; excessive intake can be toxic and may cause symptoms like hair loss or gastrointestinal upset.
Areas of Study Related:
Nutrition, Exercise Physiology, Immunology, Endocrinology.