Hi Friends,

I have some GD that is 6 months old and has not decreased in potency. I do keep mine in the fridge, but I do it out of habit and have no evidence that this increases longevity.

Other herbal tinctures seem to last indefinitely. Think about echinacea extract or vanilla extract; their shelf-life is very long. Other than the fridge (which is probably not necessary), I'd keep it out of sunlight.

Cheers,
Master Wu