To start with, the laser test only measures carotenoids (beta-carotene, alpha-carotene, lutein, and lycopene). It is not a measure of your total amount of antioxidants. If you want to score high on the laser test, eat lots of carrots the day before before the test.

All the laser articles on the internet also link the laser (Pharmanex BioPhotonic Scanner) measurement with the sale of LifePak supplements. Even one of laser company's scientific studies is a sales pitch for their supplements. The company's web site is here.

The laser shows lower values for those people who get more sun-light. The laser response is sensitive to skin pigmentation, which is why they use the palm. It also explains why people with more sun exposure test worse with this system.

I was unable to find any correlation data that shows that low readings on the laser meant low levels of antioxidants in the blood.