Retinol or retinoid or vitamin A is very popular in cosmetics because it mainly works to rejuvenate the skin: fewer wrinkles and a better complexion. However, in too high a concentration it can irritate the skin, which means that you have to keep an eye on the %.
A well-known form is retinol, of which it is best to use 0.4% to a maximum of 1%. The message is to build up slowly. The higher the %, the faster the risk of irritation.
Also know that retinol cannot actually withstand air and light: it is an unstable ingredient. So your packaging must always be air- and light-tight. If this is not the case, distrust the product!
A cool place is also better than a place that is too warm so that the product retains its effectiveness.
The retinols and retinoids that Bio'ty Lab sells are all selected based on % and ingredients and are therefore all safe for you!
Pregnant? Better not use retinol then!