Biological age is a measure of your health, irrespective of your actual chronological age. For example, a chronological 80yearold can have the biological health (age) of a 30yearold, and vice versa. The biological age of a person can but does not have to, correspond to their chronological age. The difference between chronological and biological age of a person is caused by various genetic and environmental factors (e.g. lifestyle). The GlycanAge test result is the comparison of your IgG glycans with IgG glycans from other people in your population. Your GlycanAge is a read-out of the chronological age of the people your IgG glycans most correspond to.