The present invention relates to novel peptides derived from an EDAR (EDAR receptor) ligand which belongs to TNF (tumor necrosis factor)-α family and to uses of the same. The present peptides of EDA3 derived from EDA and EDphD1 derived from EDAR ligand possess identical or similar activities to naturally occurring EDA and have much higher stability and skin penetration potency than naturally occurring EDA. Therefore, the composition containing the present peptide not only shows excellent effects on improvement in hair loss and promotion of hair growth, but also has superior efficacies on treatment of an EDA signal transduction pathway-related disorder. In addition, the outstanding activity and stability of the present peptide described above may be greatly advantageous in application to pharmaceutical compositions, quasi-drugs and cosmetics.
