[Product Question] Is collagen a beneficial topical ingredient?

Beauty Tips For Body Care
Hey /r/SkincareAddiction. I recently came across a "collagen serum" and I'm trying to figure out whether that's a thing.I know that using other ingredients like Vitamin C can promote collagen production, but does applying collagen topically actually have proven benefits? The serum I'm looking at is pricey, but it has dozens of glowing reviews.Here are the ingredients:Water, Soluble Collagen (Marine derived), Glycerin, Hydrolyzed Elastin (Marine derived), Honey, Phospholipids, Sphingolipids, Hyaluronic Acid, Algin (Marine derived Algae), Aloe Barbadensis (Aloe Vera) Powder*, Sodium Benzoate (Food grade preservative), Potassium Sorbate (Food grade preservative). *Certified OrganicIs this just an overpriced hydrating serum?
Girls Blog 2015
Submitted by plateaubeauty