For people testing (not kombucha)

Vaxa's Litmus paper / pH Test Strips are considered by many to be the most accurate pH test strips available. These's are the choice of health care professionals and health food stores for years for one simple reason. They are the most accurate pH test strips available. Individual strips, rather than a roll, eliminate wasted litmus paper and makes it easy to test your pH. Also, every box of our litmus paper / pH test strips come with two color matched, pH charts so you can easily, and accurately determine your body pH  from 5.0 to 9.0. 
How Do I Know If I Have An "Acidic pH"?

Test in the privacy of your own home, what your urine pH is. Your urinary pH, is generally a good indicator of how acid or base your total body pH is. When urinary pH is continuously between 6.5 in the a.m. and 7.5 by evening, you're functioning in a healthy range.  Ask for our Free pH CD and Health Guide to help you get started.

Should not be used to test Kombucha Tea (KT is in the 2-5 pH range)

Is Kombucha ACIDIC or ALKALINE ?

The classification of kombucha vinegar according to Traditional Chinese  Medicine  is  Sour, Bitter and Warm, and milder than alcohol which is Hot (alcohol contributes to phlegm and stagnation). TCM uses kombucha to break stagnation and to move the blood and Qi. Thus improving circulation and contributing to the general feeling of well-being.

As a Pro-biotic: Acidic kombucha, pH 2-3.5  aids the Stomach (both in the TCM and western sense) in the breakdown and digestion of food ingested.  Beneficial bacteria and yeasts, that comprise the Live K-T or Pressed Extract (as opposed to pasteurized, neutralized, alcoholic or dead kombucha) compete with and help remove (suppress) harmful bacteria, yeast, parasites. (Probably why Candia sufferers can drink K-T). Then due to the synergism of the stomach acids and kombucha (Acid and Alkaline meets Yin and Yang, Herman Aihara ISBN 0-918860-44-x), kombucha transforms into an alkaline forming substance. Now the transformed Alkaline kombucha pH 7+, aids the Spleen (function in TCM), intestines, gall bladder and pancreas (function in western speak) in metabolizing and distributing that digest throughout the body. Thus IMHO, kombucha truly holistically balances & harmonizes the body.

The actual pH of the body changes. As researched recently by Dr Barefoot (Calcium Factor) and earlier by the Germans “Kombuchal”  see German Reichspatent 538 028 online in both the original German and an English translation offered by Harald Tietz and others. http://happyherbalist.com/german_kombucha_patent.htm