Natural vs synthetic cosmetic ingredients: myths and facts
Why “natural” does not automatically mean safer, what eco labels actually certify and what the EU microplastics rule changes.
Updated: 31 October 2026 · Reviewed by: Kamil Pyziak
Myth 1: natural means safe
Many natural ingredients are well tolerated, but nature also produces strong allergens and irritants. Essential oils, for example, contain fragrance substances such as limonene, linalool or citral, which must be named on the label above set thresholds because some people are allergic to them.
In the EU every cosmetic ingredient, natural or synthetic, must be safe under normal use, and every product needs a safety assessment before it is placed on the market.
Myth 2: synthetic means harmful
Synthetic ingredients can be designed to be pure, stable and consistent from batch to batch. Many common ingredients are made in a lab even when an identical molecule exists in nature – for example vitamin E (tocopherol) or hyaluronic acid produced by fermentation.
The molecule matters, not where it came from. A synthetic and a natural sample of the same substance have the same INCI name.
What INCI names reveal about origin
Plant ingredients usually carry the Latin name of the plant and the part used, for example Simmondsia Chinensis Seed Oil (jojoba oil). Many other names do not reveal origin: glycerin, squalane or cetearyl alcohol can come from plants, animals or synthesis.
Words such as “organic” or “natural” are not part of INCI names, so the list itself does not show organic farming.
Natural and organic claims and certificates
There is no single EU legal definition of a “natural cosmetic”. Claims must, however, be truthful and not misleading under the EU rules on cosmetic claims. Private standards (for example ISO 16128 calculations or certification schemes) set their own rules about which ingredients and processes are allowed.
When a product shows a certification logo, the certifying body’s website explains what the logo covers.
Microplastics: what changed
Commission Regulation (EU) 2023/2055 restricts synthetic polymer microparticles that are intentionally added to products, including cosmetics. Rinse-off products with microbeads were affected first; other product types have longer transition periods.
Ingredients such as polyethylene or certain acrylate copolymers can fall under the restriction depending on their form (solid particles) and size. Not every synthetic polymer is a microplastic – many dissolve in water or are liquids.
What the label does not tell you
The label rarely says whether an ingredient is natural, nature-identical or synthetic, and it does not show concentrations. Judge a product by its full composition, your own skin’s reaction and the manufacturer’s information rather than by a single word on the front of the pack.