I've had wonderful results with Serovital personally. I started taking it about 2 years ago, I use the liquid version as I can't stand to take all those packets lol. I've seen a big difference in my skin's texture.......it is more plump and firmer.
When I hit my late 40's I noticed the elasticity in skin was becoming more lax. I'm fortunate not to have many lines and wrinkles but I could tell my face especially was losing firmness and tone. Taking this I've noticed a big improvement! It did take awhile to really begin to see the effects (about 2-3 months for me) but it's been worth it. Yes, it's pricey.....but not much more than many skin care items I use.
I stopped using it for about 3 months (a move, a bicycle accident).....I was surprised at how quickly things began to "slip". I didn't notice how much it was actually doing for my skin, hair and energy level until I stopped for a bit. I stopped drinking coffee so I justify the expense by no more Starbucks runs
HTH