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It's easy to get confused about whether milk is an acid or a base, especially when you consider that some people drink milk or take calcium to treat an acidic stomach. Actually, milk has a pH of around 6.5 to 6.7, which makes it slightly acidic. Some sources cite milk as being neutral since it is so close to the neutral pH of 7.0. Milk contains lactic acid, which is a hydrogen donor or proton donor. If you test milk with litmus paper, you'll get a neutral to slightly acidic response.

Comments

February 4, 2012 at 12:18 am
(1) ankur says:

I test milk and litmus gave acidic response,is milk adultrated or not?

July 29, 2012 at 9:43 am
(2) MausuZ says:

What about milk made especially for those who are lactose intolerant, such as the Lactaid brand milk? If they put enzymes in the milk to reduce or eliminate the lactose wouldn’t that mean there’d be less lactic acid in it? Would that milk then be full-on neutral, or more of a base?

September 3, 2012 at 5:52 pm
(3) Austin says:

Pure milk is very close to the same pH scale as water,milk is 6.8,water is 7.0.Some milk products are filled with preservatives that raise the basic pH value.I am lactose intolerant myself,so I can’t have large quantities of milk higher than 6.7 on the pH scale.

February 24, 2013 at 10:35 am
(4) shadow0001 says:

Milk is more of a base

May 7, 2013 at 3:50 pm
(5) John says:

(1) No.
(3) Do you mean lower than 6.7?
(4) You’re wrong, and while that would be excusable elsewhere since it’s “common knowledge” that milk is a base, this was meant to clarify that misconception, so you’re being wrong right after being corrected, which is idiocy.

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