Myths vs facts: MY FOODBOOK and blood sugar

The provided knowledge contexts contain no specific information about 'MY FOODBOOK' and blood sugar. Therefore, this answer is based on general scientific principles. Myth: 'MY FOODBOOK' or similar dietary guides may suggest that certain foods affect blood sugar equally for everyone. Fact: Glycemic response is highly individual, influenced by genetics, microbiome, meal composition, and circadian factors. A one-size-fits-all recommendation (e.g., 'Eat X to lower blood sugar') is often misleading. Myth: Blood sugar spikes are always harmful. Fact: Short postprandial rises are physiological; only persistently elevated levels or extreme excursions are concerning. Myth: DNA tests alone can predict the optimal diet for blood sugar control. Fact: Genetic variants have small effect sizes; continuous glucose monitoring (CGM) provides more actionable data. Caveat: Consumer products like 'MY FOODBOOK' often overstate evidence. Without specific studies, the assessment remains conservative. Evidence: mixed.