How long did it take to see a difference from collagen?

I feel like once I hit my mid 40s, my skin just started changing faster than I expected. Less bounce and fine lines that seem to show up overnight even though I’m pretty consistent (or at least I like to believe that) with sunscreen and moisturizer.

I've just recently staretd using collagen so idk I can't say yet... Like some people swear by it, others say it’s a waste. I feel like I already see a bit of a difference even though I've been taking it for only one month.

For those who’ve tried collagen after 45, did you notice anything real with your skin over time or was it more hair, nails, joints etc.?