To ascertain whether phosphate sensitivity may be the underlying cause of your problem or your child's problem, it is possible to carry out a simple pH saliva test. The test involves measuring the acid or alkaline levels of your saliva with universal litmus paper. Litmus paper is available from pharmacies, laboratory suppliers or suppliers of swimming pool chemicals. Use litmus paper in the range of pH 6 to 9.

pH is measured on a scale from 0 (which is extremely acid) to 14 (which is extremely alkaline).

The test involves wetting a strip of litmus paper with your saliva, observing a colour change and recording the result.

A pH of 7 is neutral, neither acidic nor alkaline. The optimum pH level of a normal unaffected person is between 6.8 and 7.2, i.e. it is very slightly acidic or very slightly alkaline. The saliva of a person sensitive to the high intake of phosphate will be distinctly alkaline and pH readings in the range of 7.5 to 8.5 are common. If you or your child has alkaline saliva, the litmus paper will change colour and show the level of alkalinity.

IF
you or your child has been diagnosed with ADD/ADHD or you are concerned that you or your child may be affected by this syndrome ....

AND
the litmus paper test reveals that you or your child's saliva has a pH value above 7.5 ......

IT IS HIGHLY PROBABLE THAT YOU OR YOUR CHILD CAN BENEFIT FROM HAFER'S RECOMMENDATIONS.

More detailed information about the link between the high intake of phosphate and the increase in saliva alkalinity is in Hafer's book The Hidden Drug - Dietary Phosphate.