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The Blue Copper Peptide Bakuchiol Serum

Serum

The Blue Copper Peptide Bakuchiol Serum — Reddit Reviews

by COSRX

Not enough verdicts yetSee the Reddit discussion

Updated October 17, 2026

Peptide serum people consider for flexible AM/PM use; little firsthand feedback.

What the community says

Backed by 68 studies

A peptide-and-bakuchiol serum that Redditors are still figuring out, with questions around whether it belongs in morning or evening routines. One commenter thinks it could work in the morning; firsthand usage reports remain thin.

From Reddit

Backed by 1 thread from r/40plusskincare.

Read the threads ↓

What people love

  • AM use specifically discussed by Redditors
  • Appears across Korean and 40+ skincare discussions

Product details

Skin type data limited

Where to buy

What the science says

  • Acne

    Some evidence

    Niacinamide: 6 studies tested it on its own. See all 17 studies

    What the studies found
    • Most studies found niacinamide helped acne
    • It often cleared acne about as well as clindamycin when put on the skin
    • Some studies found it helped reduce red, sore spots and pimples
    • Some evidence is still uncertain because some studies found no clear difference
  • Hyperpigmentation

    Some evidence

    Niacinamide: 5 studies tested it on its own. See all 20 studies

    What the studies found
    • All 5 studies that tested it on its own found it helped fade dark spots
    • On its own, it reduced facial darkening and made skin look lighter than a placebo
    • It also improved dark spots linked with sun damage in one clinical trial
    • Used with other ingredients, it faded patches more than niacinamide alone or the other ingredient alone
    • The side effects were similar and mild in the study that reported them
  • Anti-Aging

    Some evidence

    Niacinamide: 3 studies tested it on its own. See all 9 studies

    All 3 ingredients for anti-aging

    Niacinamide Some evidence

    • All 3 studies that tested it on its own found it helped with signs of aging
    • Studies found it improved the look of wrinkles and made skin seem firmer
    • Studies also found it helped dark spots and reduced redness and yellowing
    • One study found it helped skin hold more water and lowered water loss through the skin
    • Used with another ingredient, it improved dark spots, fine lines, wrinkles, and firmness more than niacinamide alone

    Bakuchiol Not proven yet

    Few or mixed studies. This claim isn't established.

    2 studies tested it on its own. See all 6 studies

    • Both studies that tested it on its own found it helped with signs of aging
    • It improved skin smoothness, appearance, and how much water the skin held
    • It reduced wrinkles and dark spots about as well as retinol
    • The reported side effects were less scaling and stinging than retinol

    Studied at 5%this product: 0.25%

    Peptides Not proven yet

    Few or mixed studies. This claim isn't established.

    2 studies tested it on its own. See all 6 studies

    • Both studies that tested it on its own found it helped with signs of aging
    • Studies found it improved firmness and made skin texture look smoother
    • One study found it reduced wrinkles and improved how much water the skin held
    • One study found it worked better than a human-derived growth factor serum for skin texture and firmness
    • No stinging, itching, or discomfort was reported in one study
  • Skin Barrier

    Not proven yet

    Few or mixed studies. This claim isn't established.

    Niacinamide: 1 study tested it on its own. See all 17 studies

    What the studies found
    • The one study that tested it on its own found it helped the skin barrier
    • It lowered water loss through the skin
    • It increased the thickness of the outer skin layer

Research context, not treatment advice. Studies are about the ingredient, not necessarily this exact product.

Real Reddit threads — 3 mentions across 1 thread

COSRX The Blue Copper Peptide Bakuchiol Serum on Reddit, in one place — 1 thread from r/40plusskincare, summarized.

“Cosrx blue peptide serum”

Mentioned

“Look at these products:”

Mentioned

“In general just look at Korean skincare.”

Mentioned

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