Synthetic (so-called "chemical") cosmetic ingredients are not inherently bad for the skin; they are often safer, more stable, and better studied than many naturally derived botanical extracts.

noli's read

The common assumption that natural is systematically superior to synthetic has no solid scientific basis. In reality, independent expert committees such as the Scientific Committee on Consumer Safety (SCCS) in Europe and the Cosmetic Ingredient Review (CIR) in the United States assess the safety of cosmetic molecules based on rigorous criteria of purity and exposure, without regard to their origin. A major literature review published in Food and Chemical Toxicology notes that plant extracts are complex mixtures of hundreds of components, which increases the risk of batch-to-batch variations and skin sensitivity reactions. Conversely, a synthetic ingredient is generally purified to the level of a single molecule, offering targeted, stable, and much better-documented action. Furthermore, regulatory authorities restrict many naturally derived compounds due to their potential to cause irritation or allergic reactions, as seen with certain essential oils. Skincare science therefore confirms that a synthetic ingredient is frequently safer and more respectful of the skin barrier's balance.

the sources

No named source held this one up — that absence is part of the verdict.