Matcha is a powdered green tea, which is touted as powerful anti-oxidant. However, contrast in green colours appears over time due to oxidation.
Potential Discovery or Invention
My spice container of Ginger powder, which is touted as potent anti-oxidant, was getting pretty low, so I refilled it. Even though the Ginger powder comes from the same vendor in Amazon.ca, remarkable colour contrast is noted.
