Hair mineral analysis can sometimes provide clues about heavy metal exposure and disruptions in mineral metabolism. One interpretation method often discussed in environmental medicine is known as the “Counting Rules,” originally described by Andy Cutler, Ph.D.
The counting rules are primarily applied to hair mineral tests performed by laboratories such as Doctor’s Data and Mosaic Laboratory. This method evaluates the pattern of mineral levels, rather than focusing solely on whether individual minerals appear high or low.
According to Dr. Cutler’s theory, heavy metals—particularly mercury—can disrupt the body’s ability to properly transport and regulate minerals. This phenomenon is sometimes referred to as mineral transport derangement. When this occurs, minerals may appear unusually distributed across the reference ranges of a hair test. The counting rules attempt to identify these abnormal patterns.
If one of the counting rules is met, it may suggest the possibility of heavy metal toxicity, including mercury and other toxic metals.
How the Mineral Graph Is Organized
At the bottom of a typical hair mineral analysis report, you will see a graph showing the distribution of mineral levels across percentile ranges.
Key reference points include:
- 50th percentile – the midpoint or average value
- 2.5th percentile – extremely low end of the reference range
- 97.5th percentile – extremely high end of the reference range
- 16th–84th percentile zone – considered the central “normal” distribution range
The counting rules examine how many minerals fall within or outside these percentile zones.
The Four Primary Counting Rules
There are four main counting rules used in this assessment method. Only one rule needs to be met for the pattern to be considered positive.
A positive counting rule may suggest disrupted mineral metabolism potentially associated with heavy metal exposure.
Counting Rule #1
Five or fewer minerals located to the right side of the graph, beginning at the 50th percentile.
Counting Rule #2
Five or fewer minerals located to the left side of the graph.
Counting Rule #3
Eleven or fewer minerals located within the central zone, which includes the area between:
- the 16th percentile on the left
- the 84th percentile on the right
- including the 50th percentile
A low number of minerals in this middle zone suggests that minerals are abnormally scattered across the chart.
Counting Rule #4
Four or more minerals located at the extreme ends of the graph, meaning:
- the 2.5th percentile, and/or
- the 97.5th percentile
This pattern indicates minerals clustering at extreme high or low levels.
The Alternate Counting Rule
There is also an alternate interpretation rule.
If two separate counting rules fall short by only one mineral, the result may still be considered positive.
For example:
- Six minerals shifting to the right (one away from Rule #1)
- AND Twelve minerals in the middle zone (one away from Rule #3)
Together, these patterns may still suggest mineral transport disruption.
Another note regarding Counting Rule #3: if a mineral value touches a percentile boundary line but does not extend past it, it is still counted as part of the middle-zone mineral count.
Why Heavy Metals Affect Mineral Patterns
Heavy metals such as mercury, lead, arsenic, and cadmium can interfere with many biochemical processes, including:
- Enzyme function
- Mitochondrial energy production
- Detoxification pathways
- Mineral absorption and transport
Because minerals play important roles in nerve function, immune regulation, and antioxidant defenses, disruptions in mineral balance may contribute to a wide range of symptoms.
In children with autism spectrum disorders, some researchers have suggested that environmental toxins and impaired detoxification pathways may play a role in metabolic imbalance for a subset of individuals. Hair mineral analysis is one of several tools sometimes used to evaluate these patterns.
Important Considerations
While the counting rules method is used by some practitioners, it is important to understand that hair mineral analysis alone cannot diagnose heavy metal toxicity.
Hair testing results should always be interpreted in conjunction with clinical symptoms, medical history, and additional laboratory testing when appropriate.
Other testing methods may include:
- Blood testing
- Urine provocation testing
- Organic acid testing
- Environmental exposure assessments
A qualified healthcare practitioner experienced in environmental or functional medicine should guide the interpretation of these results.
Important Disclaimer
The material contained within this document is not intended to replace the services and/or medical advice of a licensed healthcare practitioner, nor is it meant to encourage diagnosis or treatment of disease. This material has not been reviewed by the Food and Drug Administration (FDA) and is provided strictly for educational purposes.
Health Training Associates (and its associates and affiliates) does not accept legal responsibility for any problems arising from experimentation with the information described herein. Any application of the suggestions set forth in this document is at the reader’s discretion and sole risk. Implementation or experimentation with supplements, herbs, dietary changes, medications, or lifestyle modifications should always be discussed with your (or your child’s) personal physician before beginning.