The Ordinary Buffet + Copper Peptides 1%: What it does and how to use it

What is in the serum?

The formula combines copper peptides, other peptides, amino acids and multiple forms of hyaluronic acid. The US listing is $32 for 30 ml, which is a small bottle with a very long name. Ingredients can change by purchase date and region; use your box's list when checking ingredients.12

Does it contain oil, alcohol or silicone?

The US formula contains no oil, alcohol or silicone, and its listed pH is 6.00 to 7.00. The Ordinary also lists the serum as vegan and gluten free. These are useful formula preferences when choosing a product, rather than reasons to skip the patch test.2

Does it help with dryness too?

Dryness is another intended target of the serum. The formula includes glycerin, a moisturizing ingredient that helps retain moisture, alongside the peptide blend. Glycerin is useful for oily skin as well as dry skin, so its presence is not a reason to reserve the serum for a dry complexion. Think of the moisture support as a separate role from the peptides' effects on visible signs of aging.23

What do copper peptides do for skin?

Copper peptides support production of collagen and elastin, proteins that give skin structure and flexibility. They also act as antioxidants and promote production of substances such as hyaluronic acid. These actions can help skin look firmer, smoother and softer. The amount of visible change from this particular serum is uncertain.3

Why do collagen and elastin matter?

As skin ages, collagen production decreases and existing collagen fibers break down more. Enzymes that break down collagen and elastin also increase. Changes in these structural proteins help explain why firmness and elasticity are common targets for peptide skincare. Skin's appearance also depends on hydration and its ability to bind water, not just the amount of collagen. UV exposure can damage structural proteins and contribute to loss of moisture, firmness and elasticity, as well as wrinkles. This accelerated aging caused by sun exposure is called photoaging.5

How do copper peptides compare with other peptides?

Peptides are short chains of amino acids, and different chains do different jobs. Cosmetic peptides include signal peptides, carrier peptides, neurotransmitter inhibitor peptides and enzyme inhibitor peptides. Across the wider peptide family, potential actions include supporting collagen production, skin cell growth and reducing inflammation. Copper peptides are not the whole category, and this serum combines them with several other peptides rather than using copper alone.145

A peptide's sequence affects its shape, charge and interaction with skin membranes. Delivery matters too: peptides can struggle to pass through the skin's outer barrier, limiting their effectiveness. A promising ingredient mechanism is therefore not enough to predict a visible result; the finished formulation and delivery also matter.45

Are peptides with the same amino acids interchangeable?

No. The order of the amino acids matters as well as which amino acids are present. Changing an amino acid's position can change how a peptide interacts with a membrane. Positively charged peptides can bind more readily than neutral or negatively charged peptides. An ingredient list containing several peptide names therefore describes several distinct molecules, not repeated servings of one ingredient.4

How do you use it?

1. 1Cleanse your face.
2. 2Apply a few drops to unbroken skin.
3. 3Follow with moisturizer.

The Ordinary tells you not to combine this serum with direct acids, including salicylic acid, direct vitamin C, retinoids, EUK or strong antioxidants such as resveratrol and ferulic acid. Check those conflicts before adding the serum to an existing routine.1

Who should be careful?

The serum is intended for all skin types. Patch test first, especially with sensitive skin: apply a small amount to a clean upper forearm, keep dry and rinse after 24 hours. Do not use if redness, burning, itching, blistering or irritation appears. If facial use causes irritation, rinse off, stop and consult a physician.2

How long does it take to work?

Regular use may improve texture, firmness and the appearance of fine lines. There is no established result deadline for this serum.1