Give the products the same job
A useful moisturizer comparison begins with the role the product would fill. The INKEY List Peptide Moisturizer, Naturium Multi-Peptide Moisturizer and Drunk Elephant Protini are all positioned as moisturizing creams. That shared role makes them easier to discuss together than a cream, a facial serum and a prescription program with unrelated fees.
It does not make them identical formulas or guarantee that all three suit the same reader. Consider the current routine, skin preferences and known ingredient sensitivities before comparing marketing language. We have reviewed their public documentation, not performed a blinded wear test or measured which cream feels best on an individual face.
Price differences need package context
The checked standard products are $18 for The INKEY List's 50 mL package, $20 for Naturium's 50 g package and $72 for Drunk Elephant's 50 mL package. The first and third correspond to $0.36 and $1.44 per mL. Naturium corresponds to $0.40 per gram, which is a different unit and should remain labeled that way.
These figures describe ordinary standard-package offers before shipping, taxes and any promotion. They do not include an assumed refill saving or subscription reduction. Confirm the selected variant and basket total, because the smallest shelf price may not produce the smallest delivered order once shipping is included.
Peptide names reveal different formulas
The INKEY List identifies Pentapeptide-48 and Acetyl Hexapeptide-37 within named complexes. Naturium's moisturizer lists palmitoyl tripeptides and Palmitoyl Tetrapeptide-7. Protini includes a broader blend with Copper Palmitoyl Heptapeptide-14. None of those descriptions establishes a universal strength ranking based on the number of ingredients or a complex percentage.
The supporting bases differ as well. Humectants, emollients and other ingredients contribute to the finished moisturizer, so the peptide headline does not explain the entire product. Naturium's cream should also not inherit the copper classification of its Advanced Serum simply because both come from the same brand.
Compare the evidence disclosure, not just the claim
Naturium describes an eight-week study but the checked summary does not give a participant count. Drunk Elephant's study footnote identifies thirty-one people over eight weeks and reports proportions showing particular improvements. The public details differ, and neither summary establishes an independent comparison among these three creams.
The INKEY List's percentage labels describe peptide-containing complexes, not measured improvement percentages. Keep formulation percentages, participant proportions and actual effect sizes separate when reading the pages. A larger number can refer to a different concept entirely, so it cannot settle which product will give a reader a better result.
Decide what earns its place in the routine
All three manufacturers describe their reviewed creams as fragrance-free. That is useful for a preference filter, not a guarantee of identical tolerance. Follow the actual product directions, introduce changes thoughtfully and keep sunscreen as its own necessary function when the moisturizer does not carry an appropriate SPF label.
AAD emphasizes realistic expectations and products selected for skin type and budget. A premium may buy a particular formulation, packaging or refill system without proving superior clinical performance. An inexpensive cream may fill the intended role without requiring several extra products. Choose a sustainable purchase with a clear purpose, then evaluate the complete experience rather than the prestige of the price.
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.
- The INKEY List: Peptide Moisturizer, formula and US price Brand
- Naturium: Multi-Peptide Moisturizer, standard 50 g package Brand
- Drunk Elephant: Protini Polypeptide Firming Refillable Moisturizer Brand
- American Academy of Dermatology: Selecting anti-aging skin care Clinical guidance
- American Academy of Dermatology: Testing skin care products Clinical guidance
