I have no way to verify the following claim:

Applied Kinesthesiologists maintin that muscle testing can identify whether a substance is beneficial, or toxic. If this is true, having one or two members of this specialty in the group would be quite an asset.

see ref http://www.encyclopedia.com/medicine/divisions-diagnostics-and-procedures/medicine/applied-kinesiology

I have no way to verify the following claim:

Applied Kinesthesiologists maintain that muscle testing can identify whether a substance is beneficial, or toxic. If this is true, having one or two members of this specialty in the group would be quite an asset.

Essentially what the AK practitioner does, is have a person taste a small quantity of a substance, while laying flat on their back with an arm held straight up. With the instruction to resist the AK from trying to move the arm, both before and after tasting the sample, he can tell whether the tested item is beneficial, neutral, or toxic, by comparing the relative strength of muscular reaction. If the test subject suddenly becomes weaker, and is unable to resist moving their arm as directed; then the conclusion is the sample is toxic.

see ref http://www.encyclopedia.com/medicine/divisions-diagnostics-and-procedures/medicine/applied-kinesiology