Collagen is the proteins that spread in your body, mainly can be found in bones and skin, cartilage, organs, and hair. Thre are many types of Collagen. Among them, I'll show the five common types:

Type I: skin, tendon, vasculature, organs, bone (Usually, type 1 is related and effects to your skin)
Type II: cartilage
Type III: reticulate, commonly found alongside type I
Type IV: forms basal lamina, the epithelium-secreted layer of the basement membrane
Type V: cell surfaces, hair, and placenta

(From Wikipedia)

Losing collagen causes diverse problems to our bones, cartilage, and skin. With respect to skincare, Collagen helps to keep skin supple and resilient. The skin is divided into the epidermis, the dermis, and the subcutaneous fat layer. The dermis is filled with collagen —occupying more than 90%—, elastin, and hyaluronic acid, which play an essential role in maintaining suppleness. That is, a decrease in collagen leads the skin to lose its elasticity and vitality, making it rough and flabby. So, maintaining collagen in your skin is an important part to keep our skin looking young and healthy.

Recommended Collagen Products

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Collagen Bouncy Skin Set

Collagen Bouncy Skin Set is made of Iconic K-Beauty items containing Collagen which is great for firming and hydrating skin. If you use this set at your skin care routine, You can get bouncy skin looking healthy!

Included Items

-ETUDE HOUSE Moistfull collagen Cream
-ETUDE HOUSE 0.2mm Therapy Air Sheet Mask -Collagen*10 sheets
-PETITFEE Collagen & CoQ10 Hydrogel Eye Patch 60pcs
-RARASKIN 24K Gold Collagen Peel Off Mask

Collagen Intensive Facial Care Eye Cream

A hero ingredient, Hydrolyzed Collagen of Collagen Intensive Facial Care Eye Cream takes care of skin elastically. Hydrolyzed collagen also can make wrinkles smooth and improve skin firmness.

ENOUGH Collagen moisture essential cream

Nourishing skin care containing Collagen for dry skin

It is a nourishing cream that contains collagen and Shea Butter. Also, it takes care of the Moisture and oil balance.

ETUDE HOUSE Moistfull collagen Cream

The small particles of the Super Collagen™ water(Hydrolyzed Collagen) in the Moistfull Cream makes skin full of firming moisture and feeling bouncy.