How to Read Skincare Labels: What 72%, 10% and 10,000 ppm Mean

Source-based guide: built from the US labeling rule and from Amazon product pages checked October 13, 2026. Product details come from what the labels and listings state; no customer reviews were counted.

By The Beauty Read · Checked October 13, 2026 · AI-assisted research and editing · Contains Amazon affiliate links

Here is how to read skincare labels: start with the ingredient order, because under the US cosmetic rule anything above 1 percent is listed on the package from most to least. Then read each percentage as a share of the formula, convert ppm by dividing by 10,000, and treat claims like 3x or 11x as incomplete until you see how they were measured.

How to read skincare labels: start with the ingredient order

The quickest way to learn how to read skincare labels is to look at the order before you look at any number. Under FDA's cosmetic labeling rule, the skincare ingredient list on the package runs from most to least, so the ingredient at the top is the one there is most of. The rule allows a few exceptions, such as listing fragrance simply as fragrance. [E1]

For shoppers, the most useful exception is the 1 percent line. Ingredients present at 1 percent or less may be listed after the others in any order, and color additives can be listed in any order too. So the first several ingredients usually make up most of the bottle, while the order of the long tail near the end tells you very little. [E1]

That gives you a simple habit: read the first five ingredients carefully, and don't assume the last ingredient is the smallest, because anything at 1 percent or less can appear in any order. One more note: products that are also drugs, such as sunscreens, list their active ingredients separately under drug rules, so read those labels differently. [E1]

What a percentage on the front of the bottle means

Skincare percentages are the next thing to read. COSRX's Full Fit Propolis Synergy Toner appears on Amazon as a 72% Propolis Honey Toner. The bullets give the exact figures, 72.6% propolis extract and 10% honey extract, so the 72% in the title appears to be rounded down. [A1]

The ingredient list on the listing backs this up. Propolis Extract comes first and Honey Extract second, which is what the order rule predicts for the two largest ingredients. When a headline number and the ingredient order agree like this, you can read the claim with more confidence. [A1] [E1]

What the listing does not say is how concentrated that propolis extract is. A percentage tells you the share of the extract in the formula, not the share of pure propolis. Listings often don't state the strength of an extract, so two products with similar headline numbers may not contain the same amount of the actual ingredient. [A1]

Percentages printed inside the ingredient list

Some brands print the amounts right in the ingredient list. PURITO's TXA 6% Niacinamide 10% Serum lists Niacinamide (10%) second, right after water, and Tranexamic Acid (6%) third. Further down, it prints Retinal (25 ppm). [A2]

The listing also calls it a 16% synergy formula. That figure is simply the two printed percentages added together: 10% niacinamide plus 6% tranexamic acid. It is not a third ingredient, and it does not mean any single ingredient is at 16%. [A2]

Because this serum also contains retinal, the directions matter as much as the numbers. PURITO's directions say to use one dropper at night, start two to three nights a week, patch test first and wear SPF during the day. The bullets also mention AM and PM use, so follow the night-only directions while you are starting out. [A2]

What ppm means on a skincare label

Ppm stands for parts per million, and the conversion is easy: divide by 10,000 to get a percentage. So 10,000 ppm is 1 percent, and the 25 ppm of retinal on the PURITO list is 0.0025 percent. Potent ingredients are often used at well under 1 percent, which is where ppm comes in handy. [A2]

AESTURA's ATOBARRIER365 Cream Mist says it is formulated with 10,000ppm of ceramides, which works out to 1 percent. Its ingredient list on Amazon has no ingredient with Ceramide in its name. The ceramide-type ingredient listed is hydroxypropyl bislauramide MEA, alongside cholesterol and the fatty acid behenic acid. [A3]

That ingredient also appears in other ceramide products. COSRX's ceramide moisturizer lists both hydroxypropyl bislauramide MEA and hydroxypropyl bispalmitamide MEA among its ingredients and says the formula includes two types of pseudoceramide. If you want named ceramides such as Ceramide NP, check for them by name rather than relying on a headline number. [C1] [A3]

Claims like 3x and 11x: ask what they were compared with

Multiplier claims are the hardest numbers to read. The COSRX toner title promises a 3x increase in moisture level, and the bullets we read don't say what it was compared with. PURITO says its encapsulated retinal gives 11x faster performance than traditional retinol, but the bullets don't say what faster measures or how it was tested. [A1] [A2]

That does not make the claims false. It means they are incomplete on the page you are reading. Look for a footnote on the box or the brand's site that names the test and the comparison, and give the claim less weight if you cannot find one.

A 30-second label check before you buy

This is how to read skincare labels in practice. First, read the top five ingredients and remember that the rule only fixes the order above 1 percent. Second, read any percentage as a share of the formula, and for an extract, as a share of that extract rather than of a pure ingredient. Third, divide any ppm figure by 10,000. Fourth, ask what every 3x or 11x was compared with. [E1] [A1] [A2]

Finally, check the list on the box you actually receive. Amazon itself notes that packaging can carry different information from the listing, and brands can change formulas, so the box in your hand is the label that counts. [A3]

Which of these labels fits what you want?

If you like a simple toner built around one main extract, the COSRX Full Fit Propolis Synergy Toner is the clearest example here, with its 72.6% propolis extract listed first. If you want actives with printed amounts, PURITO's TXA 6% Niacinamide 10% Serum shows its numbers inside the list, but go slowly because it contains retinal. If you want a fine-spray cream mist, the AESTURA ATOBARRIER365 Cream Mist's 10,000 ppm claim converts to 1 percent. [A1] [A2] [A3]

Whichever you choose, the ingredient numbers describe what is in the bottle, not what it will do for your skin. That part still depends on your skin type, your routine and how consistently you use it.

Keep reading

• How to read K-beauty product reviews before you buy
• Korean moisturizer for dry skin: 3 ceramide creams compared
• COSRX snail mucin review: texture, routine fit and value

Frequently asked questions

What does ppm mean in skincare?

Ppm means parts per million. To turn it into a percentage, divide by 10,000. So 10,000 ppm equals 1 percent, and 25 ppm equals 0.0025 percent. Some brands use ppm for small amounts of potent ingredients, such as the retinal in PURITO's serum, and some use it for headline claims, such as AESTURA's 10,000 ppm ceramide mist.

Are skincare ingredients listed in order of amount?

Yes, for ingredients above 1 percent. Under FDA's cosmetic labeling rule, the package lists ingredients from most to least, but anything at 1 percent or less may follow in any order, and so can color additives. That means the first few ingredients are the most telling, while the order near the end says little about amounts.

Does 72% propolis mean the toner is 72% pure propolis?

No. COSRX's listing says the formula contains 72.6% propolis extract, which is the share of the extract in the bottle. The listing does not say how concentrated that extract is, so it is not the same as 72% pure propolis. Its ingredient list does put propolis extract first, which matches the headline number.

What does a 16% synergy formula mean?

On PURITO's serum, the 16% is the two printed percentages added together: 10% niacinamide plus 6% tranexamic acid. It is not a separate ingredient, and no single ingredient in the formula is listed at 16%. Read the individual percentages in the ingredient list instead of the combined number.

Should I trust claims like 3x moisture or 11x faster?

Treat them as incomplete until you find the details. A multiplier needs a clear comparison, a measurement method and, for tests on people, the number of participants. COSRX's toner listing doesn't say what its 3x was compared with, and PURITO names traditional retinol but not what faster measures, so look for a footnote on the box or the brand site.