Black and Brown: Non-Neoplastic Pigmentation of the Oral Mucosa
Carotenoids are absorbed differently depending on food preparation (cooking, chopping, etc.), the presence of dietary lipids, and individual metabolic differences
Because its a daily medication, not a weekly one, you should try to take it around the same time each day
The authors suggested that as they only considered these types of manipulations from certain image types, the actual level of image fraud in scientific papers is likely much higher (Bik, Casadevall & Fang, 2016)
As with any dietary supplement, discontinue use and consult your healthcare professional if unexpected side effects occur.