Hey Anna,
I would say yes, but like all supplements the quality/brand is going to be a huge factor in whether or not you see results. With a good quality powder you should see some positive changes in skin hydration and maybe hair and nail growth but again it’s hugely dependent on what you get. I personally use “withinUs ReHydrate” collagen powder and I do like it.
It‘s a Canadian brand so not sure if it’s available in the US though?