Thanks to Dr. David L. Watts (Founder and Director of Research, Trace Elements Inc.) our Trace Elements Inc. hair analyses not only reveal your current metabolism but equally important, they also reveal your metabolic synchronization. Slow 1 – indicates a slow metabolism with low thyroid and adrenal production (synchronized) Slow 2 – indicates a slow metabolism with adrenal dominance (out of sync) Slow 3 – indicates a slow metabolism with thyroid dominance (out of sync) Slow 4 – indicates a slow metabolism with thyroid and adrenal dominance (out of sync) Fast 1 – indicates a fast metabolism with thyroid and adrenal dominance (synchronized) Fast 2 – indicates a fast metabolism with adrenal dominance and low thyroid (out of sync) Fast 3 – indicates a fast metabolism with thyroid dominance and low adrenal (out of sync) Fast 4 – indicates a fast metabolism with low thyroid and adrenal activity (out of sync)