Collagen

Time Frame	Effect of Topical Collagen	Suitable Skin Types
1–4 weeks	Noticeable improvements in skin hydration, firmness, elasticity, and reduction in fine lines and wrinkles.	All skin types, including dry, oily, combination, sensitive, mature, and acne-prone skin
4–8 weeks	Continued reduction in wrinkles and sagging, further increases in skin density and elasticity.	All skin types, especially those with early aging signs or loss of firmness
8–12 weeks	Maximum visible anti-aging benefits: smoother, firmer skin, reduced wrinkle depth, and improved skin texture.	All skin types, particularly mature, aging, or environmentally stressed skin