Ingredient literacy
How to read a lash serum label
A label is most useful when you know what its standard names mean and what it cannot tell you. This guide puts plain English first, then shows how to use the INCI list to check a formula rather than relying on front-of-pack claims.
By Cassandra, Founder
Start with the name, then use the INCI list
INCI means International Nomenclature of Cosmetic Ingredients. It is the naming system used on cosmetic labels so the same ingredient can be identified consistently across products and markets. A familiar ingredient may therefore appear under a technical name: provitamin B5 appears as Panthenol, while the salt form of hyaluronic acid appears as Sodium Hyaluronate.
Plain-English explanations help you understand purpose. The INCI list is still the source to check because it records what is actually in the formula. On each RUSKI product page, the familiar name and purpose lead; the exact INCI name remains visible for verification.
Read for function, not ingredient theatre
A useful formula needs more than headline actives. Water may carry the formula, humectants such as glycerin help bind moisture, film formers control wear, buffers hold pH and preservatives protect a water-based product from contamination. These supporting ingredients are functional, not filler.
Peptide names should be read specifically. Myristoyl Pentapeptide-17 is not interchangeable with every other peptide, and evidence for an ingredient may come from supplier testing, scalp-hair research or broader cosmetic science rather than a finished lash product. The source type and limitation matter as much as the name.
Separate a cosmetic claim from a drug claim
Cosmetics can describe appearance and conditioning: lashes can look fuller, feel softer or appear less brittle. A claim to grow, regrow or alter the lash cycle describes a physiological change and carries a different evidence and regulatory burden.
Look for a retrievable finished-product reference when a brand quotes a measured outcome. Ingredient research alone does not prove that a particular finished serum produced the same result. RUSKI identifies whether a source is a finished-product panel, supplier data, a published study or established cosmetic-science consensus.
Common questions
What does INCI mean on a lash serum label?
INCI means International Nomenclature of Cosmetic Ingredients. It is the standard naming system used to identify cosmetic ingredients consistently. Plain-English names can explain purpose, while the INCI list lets you verify the exact formula.
Does a peptide near the end of an ingredient list mean it does nothing?
Not necessarily. Many peptides are used at low concentrations specified by their supplier, so list position alone cannot establish effectiveness. Check the exact peptide, its recommended use level, the source of the evidence and whether the finished product itself was tested.
Does an ingredient study prove a lash serum works?
No. Ingredient evidence can support why an active was selected, but it does not automatically prove the outcome of a finished formula. Finished-product testing, study design, source type and limitations should be stated separately.
Sources and limitations
official guidance
European Commission CosIng cosmetic ingredient databaseLimitation: A regulatory ingredient database identifies names and functions; it does not prove finished-product efficacy.
official guidance
US FDA cosmetic ingredient labeling guidanceLimitation: US labelling guidance is not a substitute for Australian legal advice.