@KCDiva I've been using Mizon Collagen Power Lifting Emulsion for a few years. "Emulsion" is a Korean skin care term for lotion. It's a thinner consistency and absorbs well. I particularly like this for AM so it doesn't interfere with an follow-up make up. Lately I've been experimenting with SKINN Pep 40 in the morning and I love that moisturizer too. The Pep 40 has 40% peptides, including some collagen building peptides. Going forward, I'll probably use the Mizon on makeup days and the Pep 40 on non-makeup days.
You can also look into taking marine collagen suppements to help your skin.