The best concentration of common skincare ingredients

Different functional ingredients, the effective concentration is also different, can not be completely judged by “1%, then what is the effective concentration of each major functional ingredient?️

I found that a misunderstanding shared by many friends is blindly pursuing the concentration of various active substances, believing that high concentration must be stronger than low and medium concentration. There are indeed many comparisons of papers and experiments. When the concentration of many ingredients is increased, the effect will also increase. For the time being, putting aside differences in individual tolerance, most of these experiments are carried out based on a certain ingredient.

clean skin
clean skin

And we must clearly realize that the products that we always superimpose are not superimposed in vain. These ingredients are truly complementary and synergistic and do not rely on only one ingredient.

For example, Procter & Gamble did an experimental comparison. Group A used anti-wrinkle products + sunscreen during the day and night cream + anti-wrinkle products at night. Both night cream and anti-wrinkle products contained palmitoyl pentapeptide-3 and carnosine. , Palmitoyl dipeptide-7, anti-wrinkle products also add 0.3% A ester (retinol propionate), and a small number of antioxidants are added to the sunscreen; people in group B use sunscreen every morning, the first two weeks every other day Use 0.02% A acid once, and then start using 0.02% A acid every night.

After 8 weeks, group A improved more significantly than group B. After 24 weeks, there was no significant difference between group A and B. In terms of dry skin and barrier damage, it is clear that group B is more serious. From the perspective of erythema, both groups are more severe at the beginning. From the fourth week, group B is significantly more serious than group A.

The conclusion of this experiment is that the combination of [0.3% A ester + niacinamide + peptide] is better than [0.02% A acid alone].

Don’t get excited when you see this. I think this experiment is very unfair. After all, suppose we really want to use acid. This does not prevent the use of soothing and moisturizing products to alleviate dryness and barrier problems. How can acid not be used with moisturizing?

Moreover, A acid can also be used with active substances such as nicotinamide and peptides, and there is a problem of frequency of use. The A ester group is twice a day, and the A acid group is once a day.

This is an experiment done in the United States. It is estimated that the sunscreens used are those ancient chemical sunscreens. The A acid group used up A acid the night before, and the skin was originally weak. The next day, the small molecule chemical sunscreen was applied directly on the naked face. The irritation of the agent should not be ignored!

We are using a “compound”, so we should not just consider the pros and cons of “unilateral”.

There is a big difference in efficacy between A ester and A acid. If you directly take 0.3% retinol propionate and 0.02% acid PK anti-wrinkle effect, if you only compare it like this, then retinol propionate will be eliminated. Out of the skincare world.

Our skin is a protective organ, And don’t eat as much as you give, The total amount of active substances that it can accept is limited. How to allocate limited resources to more valuable ingredients, let them work together, and help each other, so as to achieve higher value and minimize stimulus.

Below we list the optimal concentration of several common skin care ingredients

natural cosmetic ingredients
natural cosmetic ingredients


Niacinamide is generally used in whitening skincare products. Niacinamide concentration of 2%-5% can improve pigmentation, and 5% niacinamide has a stronger effect of brightening skin tone.

Note: Tolerance needs to be established from low to high.

Sodium hyaluronate

Hyaluronic acid is a kind of mucopolysaccharide with very good moisturizing ability. The true hyaluronic acid stock solution, even if the form is very thick, may contain less than 1% hyaluronic acid. Hyaluronic acid is usually effective when added to 0.1%.

0.3% will have a good effect. ️


Retinol can accelerate the production of collagen. It is generally used in anti-aging skincare products. The additional amount of 0.08% is enough to make vitamin A have an anti-aging effect. Daily use is usually around 0.3%. This concentration ensures that the effect is not too high. Stimulate. ️

Note: build tolerance from low to high, use it at night.


Polypeptides can effectively eliminate static lines and firm the skin. They are generally used in anti-aging skincare products. The acetyl hexapeptide-8, 2% peptide solution recommended by Internet celebrities can significantly reduce wrinkles. A 3% palmitoyl pentapeptide solution is approximately equivalent to 0.07% of the effect of vitamin A, and it is best to choose a palmitoyl pentapeptide solution above 3%. ️、

Vitamin C

Vitamin C is the most familiar whitening ingredient. 5% of vitamin C can achieve the whitening and anti-oxidant effect. 20% is considered a critical point, and the effect will not be improved after the concentration is increased. ️️

Note: It is necessary to pay attention to the activity stabilization technology of Vitamin C️.

Vitamin E

Vitamin E is a common antioxidant component that can protect the skin from free radical damage. Vitamin E with a concentration of 0.1%~1% can have an antioxidant effect, and it can be used together with vitamin C to strengthen the effect. ️

For example, 1% Vitamin E combined with 15% Vitamin C can achieve the effect of 1+1>2, which has a better antioxidant effect. ️


Resveratrol is a good antioxidant ingredient. Resveratrol at a concentration of less than 1% has the effect of anti-oxidation. ️ ️

Note: The structure of resveratrol is unstable, pay attention to choosing products with stable packaging technology and emulsification technology.


Ceramide is a natural ingredient in our skin, which plays an important barrier and moisturizing effect. Generally, only 0.1-0.5% is effective, so it ranks low in the ingredient list. ️


Brushing acid can bring many benefits such as horny, acne, blackheads, whitening, etc. You need to start with a low dose, and slowly increase the dose and frequency. It is recommended to use fruit acid products at a concentration of about 4-5%.

For example, glycolic acid generally chooses 4%-8% concentration; fat-soluble mandelic acid can choose 10% concentration.

Salicylic acid can work at low concentrations, generally, 0.5%-2% concentration is used. ️ ️

Note: It is not recommended to use a large area for sensitive skin with weak stratum corneum.

The above is the best concentration of several common skincare ingredients. Skincare is a long-term task, which can be completed not only by mastering a few knowledge but also by persistence over time.