There's also the stamina recovering yellow-green and the real health recovering one, red! Blue actually restores mana (so you can use magic), and the white-ish one restores your special abilities. Don't be afraid to mix and match; it's in your best interest!
Its so good it makes the blue flavor just look like windshield wiper fluid and taste like anti-freeze. I mis-typed my first reply anyways because I meant "head and shoulders above the blue one".
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It tasted like those watermelon hard candies with a bit of strawberry.