- Standard package
- 50 mL
- Copper ingredient
- Copper Palmitoyl Heptapeptide-14
- Study summary
- 31 people, 8 weeks; manufacturer-reported
Specify the standard package first
The checked Drunk Elephant US page lists Protini Polypeptide Firming Refillable Moisturizer at $72 for the standard 50 mL package. The interface also offers a refill and subscription-related pricing, so this review uses the ordinary standard-package amount rather than mixing a discounted refill or recurring purchase into the headline.
The manufacturer describes a gel-cream moisturizer. It is a retail cosmetic product, not a prescribed treatment. We have not applied it or measured its finish, comfort or effect on skin. The review assesses what the brand documents and how that information compares with other moisturizer purchases.
Identify the actual copper ingredient
Protini's ingredient list includes Copper Palmitoyl Heptapeptide-14 among a broader peptide blend. It also names Palmitoyl Tetrapeptide-7, Palmitoyl Tripeptide-1 and several other peptide ingredients. This supports classifying the formula as copper-containing, but it does not establish that it is a one-percent GHK-Cu cream or equivalent to a dedicated copper serum.
Supporting ingredients include glycerin, emollients and amino acids. The page does not disclose the amount of each isolated peptide, so counting peptide names cannot determine potency. Evaluate the whole formula and the role it would play in a routine rather than assuming more named peptides guarantee a better result.
Read the study percentages with their denominator
The brand reports a study of thirty-one people over eight weeks and displays proportions showing improvements in several appearance and hydration measures. A proportion of participants who improved is not the same statistic as the average percentage reduction in a wrinkle measurement. The distinction matters when interpreting a large number beside an image.
We have not independently reproduced the study or verified that Protini performs better than every lower-priced option. The public summary does not answer every question about comparators, measurement methods or the contribution of individual ingredients. Treat it as manufacturer-provided evidence with a defined sample and duration, not a universal prediction for a new user.
Fragrance disclosure and day-to-day use
Drunk Elephant states that the formula is free of fragrance, essential oils and several other ingredient categories. Those statements can help a reader match specific preferences, but they do not make the formula incapable of irritation or establish that the excluded categories are unsafe in other products.
The page describes morning and evening use and compatibility with products in the brand's range. Follow the actual package directions and evaluate additions cautiously when prescribed skincare is involved. A peptide moisturizer without an SPF label does not replace sunscreen, regardless of language about environmental damage or visible aging.
Calculate value without overstating it
At $72 for 50 mL, the standard package costs $1.44 per mL. That can be compared directly with another volume-labeled moisturizer, but it cannot determine the cost per month without a verified use rate. A separate refill may offer different economics; confirm its current price and container requirements before counting the saving.
Protini's strengths are its detailed ingredient disclosure, refill option and study footnote. Its premium remains a personal purchasing decision rather than a verified performance ranking. Compare the supporting formula, package and budget with the Naturium and The INKEY List reviews, keeping the difference between ingredient evidence and finished-product results visible.
Useful distinctions
- Full formula and copper identity disclosed
- Refill option documented
- Study count and duration stated
Limitations to weigh
- No pure-peptide concentrations verified
- Study proportions are not effect-size percentages
- Premium pricing is not proof of superiority
Sources & further reading
Official pages and evidence consulted for this article. Checked October 11, 2026. Provider pages establish advertised terms; they do not independently establish effectiveness.
