Berevage intake methods and hydration status: validation aspects and limitations.

The validity of these approaches have been often questioned the method could be improved by using dietary recalls more frequently in order to limit the variability and dietary intake markers. Expectations for a better assessment of dietary and beverage intake are focused on new methods such as researches in metabolomics, metagenomics and natural enrichment of stable isotopes which could be helpful in terms of methods validation and useful in addition to standard methods.