Biologically bound to spirulina platensis, selenium is absorbed and utilized particularly well 

Selenium promotes healthy function of 
the thyroid gland
normal hair and nails, normal sperm formation
protects the cell from oxidative stress
As selenoproteins play a key role in regulating ROS and redox status in nearly all tissues, selenium strongly influences inflammation and immune responses 
 
Spirulina platensis is low in iodine, tolerable for iodine-sensitive people
An increased need for selenium can arise with a vegetarian diet, stress, sport, smoking and during pregnancy and breastfeeding.