Measurement of the rate of hair growth using a fluorescent tracer technique
Jonathan R. Matias , Rhoda Alani , Norman Orentreich

Synopsis

The rate of hair growth was measured in the guinea pig by determining the distance between the fluorescent bands produced by subcutaneous injections of sodium fluorescein. The minimal dose required to produce a visible fluorescent band was determined to be 30 mg\/kg for the guinea pig. Rate of hair growth may also be measured in localized areas of the skin using intradermal injections at dosages as low as 0.25 mg. This method is simple, inexpensive, accurate, and less time-consuming than radiotracer methods.

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