If I were using collagen peptides, I’d treat them like a low-drama trial. Pick one product, use it consistently, watch for benefits and side effects, and decide after a fair period.
I don’t like extreme claims in either direction. Collagen peptides are not useless for everyone, but they are not a cure-all either. The realistic position is that they can be a supportive habit with modest effects.
I would start by asking what the person wants from collagen. Skin, joints, hair, fasting, protein intake and recovery are different goals. The answer changes depending on the goal and health context.
My view is that collagen peptides are a reasonable experiment if the cost and digestion are acceptable. Some people notice benefits; some do not. Bodies differ, products differ and expectations differ.
I’d give a balanced answer: collagen peptides can be useful, but they are not magic. They may support skin, joints or connective tissue for some people, especially with consistent use. They should not replace normal protein, sleep, movement or medical care.