In order to check the shelf life of every single NOAH product you can read on the back of the packaging the PAO symbol (usually a picture of a jar with a number inside): this indicates the number of months for which the product keeps intact its characteristics from the date of the first opening.
It is possible to consult the ingredients list of each product directly on the page dedicated to it on the website. Under the description, you find the Ingredients list containing the ingredients of the chemical formula. Since in the market you can find various versions (more or less recent) of the same product, some differences are possible between the list of ingredients published on the web site and the one of the product on the shelf.
All products of NOAH Color line is “Nickel tested” as reported on each package. It means that the finished product passed the nickel test.
In any case, you can perform a preliminary sensitivity test 48 hours before using the product.
It is necessary to clarify that it is virtually impossible to avoid completely the presence of this mineral. According to that, to be honest we have to say that Nickel is present in a minimal quantity in our products. Therefore, we have chosen to promote our cosmetic products as “Nickel Tested”. It means that each production batch of NOAH cosmetic products Nickel Tested are subject to analysis for the Nickel.