Allantoin

Time Frame	Effect of Allantoin in Skincare	Suitable Skin Types
1 week	Noticeable soothing of irritation and redness; improved hydration and initial relief for dry, sensitive, or inflamed skin.	All skin types, especially sensitive, dry, or irritated skin
2–4 weeks	Enhanced moisture retention, softer and smoother skin texture; reduction in flakiness and visible signs of irritation.	All skin types, including eczema- and acne-prone
4–8 weeks	Strengthened skin barrier, accelerated cell regeneration, and improved healing of minor wounds or post-acne marks; more resilient and even-toned skin.	All skin types, especially those with barrier damage or rough texture
8–12 weeks	Noticeable anti-aging effects: reduced fine lines and wrinkles, firmer and more youthful-looking skin; long-term improvement in skin clarity and resilience.	All skin types, including mature and compromised skin