Vitamin Sea Radiance Duo: How to Use It
By Kopari Beauty | Published: 2026-10-22
Category: How-to Guides
Learn what the Kopari Vitamin Sea Radiance Duo does and how to use the Marine Clean Purifying Gel Cleanser and Vitamin C Serum for a bright, glowing complexion.
Quick answer
Use the Vitamin Sea Radiance Duo as a two-step routine: first cleanse with the Marine Clean Purifying Gel Cleanser to remove buildup, then apply the Star Bright Vitamin C Discoloration Correcting Serum to brighten and repair your skin.
Why this duo works together
The Vitamin Sea Radiance Duo pairs a purifying gel cleanser with a vitamin C serum. The cleanser preps your skin by melting away oil, sunscreen, and impurities, which allows the serum to absorb more effectively. Using them together gives you a streamlined routine that targets both clarity and brightness without overcomplicating your regimen.
Step-by-step routine
- Step 1: Cleanse with the gel cleanser: Wet your face with lukewarm water. Pump a small amount of the Marine Clean Purifying Gel Cleanser into your palms and massage it over your face in circular motions for about 60 seconds. Rinse thoroughly and pat dry. Don't rush the massage — 60 seconds gives the cleanser time to dissolve buildup without over-drying.
- Step 2: Apply the vitamin C serum: After cleansing, dispense 2-3 drops of the Star Bright Vitamin C Discoloration Correcting Serum onto your fingertips. Gently press it into your face and neck, avoiding the eye area. Let it absorb for 30 seconds before applying moisturizer. Apply serum to damp skin for better absorption, but wait until the cleanser is fully rinsed off to avoid dilution.
- Step 3: Follow with moisturizer and SPF (AM only): Lock in the serum with your usual moisturizer. In the morning, finish with a broad-spectrum sunscreen of SPF 30 or higher to protect your skin from UV damage while the vitamin C works. Vitamin C can make skin more sensitive to the sun — never skip SPF during daytime use.
Product facts
- Vitamin Sea Radiance Duo: Contains Marine Algae Extracts and Kakadu Plum. These ingredients help brighten skin while gently cleansing, so you get a glow without stripping your moisture barrier.

Vitamin Sea Radiance Duo
