Collagen does not work overnight—tissue remodeling takes time. For skin outcomes (hydration, elasticity, fine-line appearance), studies often report early signals around 4–8 weeks and clearer changes by 8–12 weeks. For joint comfort, some individuals notice improvement within 4–6 weeks, while more durable outcomes may require 2–3 months. Results depend on hydrolyzed/peptide form, adequate dosing, consistent use, and supportive fundamentals (protein intake, vitamin C, sleep, and UV protection). A practical method is a structured 12-week plan with weekly notes, focusing on trends rather than momentary perceptions. If results are absent, reassess the full system—not just the brand or dose.