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The larger the jar, the longer is its shelf life. Also, the neutral has a longer shelf life than the Urad with color.
The average shelf life of Urad neutral 7oz/200ml jar is 6 years.
To maximize its shelf life you can:
a) always put back on both lids
b) shake the jar to mix the product every 6 months
c) store in a tempered place; not too dry, not too humid, not too cold and not too hot