A member asked:

Is it safe to drink milk or whey protein with "stainless steel" cup or shaker for a long period? n how long stainless cup/shaker can be used?

A doctor has provided 1 answer

How long?: The issue is not the container but how long the liquid sits around. About 4 hours at room temperature would be okay with the fluid was sterile to being with. Wish you good health!

Answered 8/5/2018

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A member asked:

Is it safe to drink whey protein before and after workouts?

A doctor has provided 1 answer