Biotin

Biotin improves the basic protein that makes up hair, skin and nails. This protein is called keratin. Biotin deficiency can cause dry skin, brittle nails and hair, as well as hair loss. 

Biotin can be taken in a tablet form or given intramuscularly as an injection. Most supplements are not effectively absorbed by our bodies through ingestion and thus intramuscular biotin injection has been helpful in increasing biotin levels faster in many patients.