You can read more about it here:
Skin collagen: More than meets the eye
Wrinkle reducing collagen creams 'are a waste of money', say scientists
A good alternative to topically applied collagen, would probably be orally ingested forms of collagen, as well as collagen injections at the doctor's office.
Another cheaper alternative would be Vitamin C, according to reports I've read. Vitamin C is essential to the synthesis of collagen. In addition to vitamin c, using products with copper peptides also increase your collagen.
Thanks for reading,
Read my Review: La Glace Face Repair Series Collagen Moisture Repair. Collagen creams may not be effective, but can still be moisturizing.