Reading a label like a practitioner.
Where the active sits in the ingredient list, and the difference between a named dose and a hint of one.
An ingredient list is a legal document standing behind a poetic one. The front of the pack is marketing; the INCI list on the back is regulated, ordered, and quietly tells you almost everything, once you know the two rules it is written by.
Rule one: above 1%, ingredients must be listed in descending order by weight. Whatever comes first is what you are mostly buying, usually water, an oil or a butter. Rule two: below 1%, ingredients can appear in any order the brand likes. Which means every list has an invisible line in it, and everything after that line is present in small amounts, arranged for effect.
Finding the line is the practitioner's trick. Look for the preservative, most commonly phenoxyethanol, which is capped at 1% in most markets. Everything listed after it sits at 1% or less, no matter how loudly the front of the pack celebrates it. A 'bakuchiol serum' with bakuchiol trailing two places behind the phenoxyethanol contains a hint, not a dose.
“Below the preservative line, an ingredient is present in a whisper. The front of the pack is often shouting about a whisper.”
This is not automatically a scandal. Some ingredients genuinely work at fractions of a percent: peptides, some antioxidants. The question is whether the amount in the bottle matches the amount in the studies the marketing leans on. Niacinamide's evidence sits around 2 to 5%. Bakuchiol's trial used 1%. Vitamin C's classic work runs 10 to 20%. When a brand names the dose on the front, it is showing you its arithmetic. When it will not, you are allowed to wonder why.
A few more habits worth stealing. Fragrance, listed as parfum, sits near the end of the list but is the most common cause of reactions in sensitised skin, and worth avoiding entirely while a barrier is rebuilding. Essential oils read as natural and behave as fragrance. And a 'free from' list tells you what a product left out, which is not evidence for anything it put in.
None of this needs a chemistry degree. It needs the preservative trick, a rough sense of the studied doses for the actives you care about, and the willingness to turn the bottle around in the shop. Two minutes, most of it spent finding your glasses.
Davina Hearne, Naturopath (Diploma, NZ) · Founder, Valentia
Educational only. Always speak to your healthcare provider about your symptoms and before starting a new supplement.
