Wolfberries are rich in anthocyanins, which is a water-soluble alkaloid pigment. When goji berries soaked in water, anthocyanins will be released, the pH of the water will directly affect the release of anthocyanins, so soak out of the black goji berries present color will be different.

If the water presents lavender or blue, are normal phenomenon, but when the black goji berries soak in water after black or dark purple, may be black goji berries deterioration or sulfur smoked reasons, this goji berries are not recommended.

The above information is for reference only, if necessary, it is recommended to consult the relevant literature.