The accuracy and reliability of the test results and interpretation is based upon the laboratory receiving a properly collected hair sample that is clean and free from external contaminants. The ideal hair sample should be collected prior to subjecting the hair to any treatments such as bleaching, permanents, or dyes. This also includes the application of hair sprays, hair creams, gels and oils. Additionally, the hair should be washed within 24 hours of sampling and must be dry for at least 4 hours after shampooing.
There are several cautions and concerns regarding hair products. Most shampoos, rinses and conditioners do not contain metals and will not affect the accuracy of the analysis. However, medicated shampoos of concern are Selsun Blue(selenium) and Head and Shoulders(zinc). Grecian Formula contains lead and iron.
The hair sample should be cut as close to the scalp as possible and should be a maximum of 1.5 inches in length. The distal end of the hair longer than 1.5 inches should be discarded.
The recommended location for collection would be the nape of the neck.
It is very important to place the hair sample in the sampling envelope provided before sending to the laboratory. Do not place hair samples in plastic baggies or aluminum foil. Do not tape or staple the hair sample to the scale or sampling envelope.
Do not mix different types of hair such as head hair with pubic hair or beard hair in the same sampling envelope. We strongly recommend using head hair only due to its consistent rate of growth. Pubic and other body hair should only be used if sufficient head hair is not available.