L-Proline ek non-essential amino acid hai jo collagen aur elastin ka important component hai. Skincare mein isse skin-conditioning aur humectant agent ke taur par use hota hai jo skin ke natural moisturizing factor ko support karta hai. Isse skin ko hydrate rakha jata hai aur moisture ko lock karne mein madad milti hai. Yeh generally safe aur well-tolerated ingredient hai.