Many drugs have mirror chemical structures, one helpful and the other harmful – a Nobel-winning discovery allows chemists to make either on demand
From thalidomide to resveratrol, molecules with the exact same chemical properties can have drastically different effects in the body depending on how they’re arranged in space.
Many chemical compounds have mirror images, with one version potentially beneficial while the other may be harmful. This discovery earned the 2026 Nobel Prize in Chemistry for researchers who created a method to produce just one of these twin forms. This breakthrough allows pharmaceutical developers to create either the beneficial version or the harmful one, depending on the desired outcome.
A historical example of this phenomenon is the thalidomide tragedy, where one isomer of the drug caused birth defects, while the other had a sedative effect. Similarly, resveratrol, a compound found in red grapes and peanuts, has two isomers with conflicting effects on Alzheimer's disease. My research revealed that this inconsistency might arise from different isomers in clinical trials, with one being neurotoxic while the other aids cognition.
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