Biotin + Dexpanthenol

Hair loss
A combination of biotin and dexpanthenol injections has been shown to improve hair density and reduce hair loss in people with diffuse pattern hair loss. 
Biotin has also been studied in combination with other drugs, such as minoxidil, finasteride, and caffeine citrate, to promote hair growth. 
However, some say that the widespread marketing of biotin for hair loss in healthy people is not supported by the current literature. 

Skin health
Dexpanthenol is a derivative of pantothenic acid, which is a component of vitamin B5. 
Dexpanthenol is used topically to treat dry, rough, scaly, or itchy skin. 
Dexpanthenol can also be injected intravenously or intramuscularly to improve skin elasticity and rehydrate the skin. 
Dexpanthenol has anti-inflammatory properties.