Since the primary mode of preparation of powders is spray-drying, most of these powders are amorphous and glassy and the most likely reason for caking or clumping is due to a glass transition
Handa E, Puspitasari IM, Abdulah R et al (2020) Recent advances in clinical studies of selenium supplementation in radiotherapy
Radiation sickness and radiation safety: radiation, radioactive substances or because of leukopenia caused by anticancer drugs and other symptoms can play a protective effect
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Selank can help with brain health by increasing BDNF or Brain-derived neurotrophic factor (Inozemtseva LS, 2008)
Other than that, its a nice emollient that gives a smooth and soft appearance to the skin