Why most face creams don't work

Cells have a certain size while cream cells are bigger than them making it impossible to penetrate your skin. Happily, a new technology called liposomes allows micro cells to carry water, nutrients and vitamins straight into your skin cells easily. Technological advanced products, might cost a little more but would actually work.Before you buy a cream test it on your skin, if you notice it's just sitting there, maybe you should look after Serums. These are more watered and most times is small enough to penetrate your skin faster.

And what about Collagen creams?

Collagen is also too big to enter your skin, is a large, complicated molecule, measuring 300 nanometers long and 1.5 nanometers in diameter, with a weight ranging from 65,000 to 300,000 Daltons.
What?  To make it simple, Collagen doesn't penetrate your skin for the same reason other creams won't.

Then how can you make Collagen creams work?
You simply can’t. Your skin is designed to keep big strange substances out, not allowing them to penetrate our system.This means that if you use wrinkle cream, especially a collagen wrinkle one, you may want to think twice about spending that money on a product that might work simply as a moisturizer.

“The truth is, any moisturizer, whether it costs $10 or $1,000, will temporarily plump the skin for a few hours by infusing it with moisture … The cheaper creams work just as well, so don’t feel bad about sticking with sunscreen and an affordable priced moisturizer.”

But not all is lost, keep in mind the tip given before,
"Look after Technological advanced products"
these can penetrate your skin and do some work. 

 
Liposomal creams are the real solution for your skin.