Skin tightening

So as the tag implies, skin tightness. I need recommendations for serums, lotions, exercises, any sort of that. I need recs that you actually notice a difference from.

I lost a lot of weight postpartum. I went from 260lbs (heaviest/ and weight at baby’s birth) to 177lbs 1yr pp. I have loose skin on my stomach and arms. It’s not the worst but it’s enough to notice. But I think it’s still fixable with some tlc. Thank you for any advice 🙏❤️