1. Antibacterial and anti-inflammatory: Cinnamic acid has a strong antibacterial and anti-inflammatory effect, which can kill bacteria and viruses and reduce skin problems caused by infection, such as acne, viral dermatosis and onychomycosis.

2. Hyperplasia repair: Cinnamic acid can promote the growth and repair of skin cells, accelerate skin regeneration and restore skin luster and elasticity.

3. Antioxidant: Cinnamic acid has a strong antioxidant effect, which can prevent skin from being damaged by environmental pollution and ultraviolet rays and prevent skin aging.

4. Fade spots: Cinnamic acid can inhibit the formation of melanin, reduce pigmentation, fade spots and improve uneven skin color.

5. Moisturizing and moistening: Cinnamic acid can improve skin's moisturizing ability, prevent water loss and keep skin moist and soft.

Generally speaking, cinnamic acid has many effects on the skin, which can improve various skin problems and also has a good maintenance effect.