Nekton-Biotin (Bio) Vitamin Supplement for BirdsVitamin Supplement for Birds After years of research and experiments Nekton has developed NEKTON BIOTIN (BIO) to address certain problems in a bird's plumage and to ensure healthy feather growth in all types of birds. Feathers are largely protein in nature, which is why 18 free amino acids have been included in NEKTON BIOTIN to help a bird build the proteins needed. Of the amino acids, arginine, methionine and lysine are particularly vital in a