FAQs Customer service faqs - Question form all of customer

Generally, a sealed product has a lifespan of 3 years in normal room temperature (without exposure to heat, cold and light). This is a result of Stability test performed in a lab. This test is carried out with manufacturing samples that were random from both finished goods and bulk with the following steps.

- Accelerated Laboratories Studies is carried out by acceleration of oxidation to find out chemical and physical reaction of the product. In the accelerated environment, samples are collected from accelerated environment in order to find out the factors that predict the lifespan of a product. In practice, the test is carried out in one temperature environment at 45°C, 75% humidity and samples are collected at 0, 1, 2, 3 and 4 months. If the quality of the product meets the standard on the 4th month, it is possible to temporarily determine the lifespan. Laboratory test in 3 or 4 varied temperatures is also acceptable for collecting samples for chemical and physical test, most results yielded 3 year or more of lifespan therefore the credible lifespan is 3 years.

- Long Term Studies is a test that is designed to reassure the quality of products during shelf life. The samples are collected in the environment as identified on the label at 3, 6, 9, 12, 18 and 24 months and yearly for 3 years.

There are factors of humidity and contamination after opening the products, therefore microscopic tests are required at different conditions depending on type and quantity of preservatives. Generally preservatives in skin care preserve the products for no longer than 1 year after opening.