Many people who eat supposedly healthy diets suffer from excessive weight gain. In the same way, many diabetics who control their sugar intake are frequently surprised by excessive sugar in their blood. The Secret Sugar Diet exposes foods which contain sugar that does not appear on any label, yet can occur in widely eaten popular foods. It also provides ways to avoid excessive sugar and tells which foods to substitute for those with secret sugar. No reduction in eating is required, just avoiding unmarked sugar. Losing weight and avoiding high blood sugar scores are both easy to achieve, not by eating less, but just by avoiding foods we clearly point out to the reader.