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Honey fraud, in which cheaper syrups are blended into jars sold as pure honey, has pushed food scientists to develop more sensitive detection methods. Older tests relied on measuring specific sugar ratios, but fraudsters adapted by using syrups engineered to mimic honey's natural sugar profile, making these older tests unreliable on their own. Newer approaches use nuclear magnetic resonance spectroscopy to build a detailed chemical fingerprint of a sample, comparing it against a large database of verified pure honey profiles from known regions. Isotope analysis is also used, since sugars from certain plants used in cheap syrups carry a distinct carbon signature that differs from the nectar sources bees typically use. Even with these advances, regulators note that no single test catches every type of adulteration, so laboratories increasingly combine several methods before certifying a sample as pure.