L-arginine is an amino acid derived from the fermentation of pumpkin seeds and microalgae. It is a semi-essential amino acid that aids in the synthesis of other amino acids such as proline and creatine. L-arginine is a key ingredient in anti-aging skincare products due to its antioxidant and anti-inflammatory properties. Acting as a humectant, it binds water molecules to prevent moisture loss and keep the skin hydrated.
 
This amino acid has been proven to have anti-aging benefits, serving as a free radical scavenger. Research has shown that it can reduce visible signs of aging, including uneven skin tone, loss of firmness, loss of collagen, fine lines, and wrinkles. Additionally, L-arginine promotes wound healing and micro-circulation. It is often used as a buffering agent to raise the pH of formulations.