Amazoniac
Member
My experience was similar but I wasn't too concerned because I thought it was just an expected degradation of the ingredients, in a bit less than a year. The liquid became so dark compared to the original bright orange that I decided to discart.I do notice the staining of the bottle but not the liquid getting darker. I have a bottle of Energin that is almost 2 years old and there has been no change of color other than the bottle getting orange on the inside.
Have you ever opened that one during this time?
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