Does Apple Cider Vinegar Lower Blood Sugar?
Medically reviewed by Faith Coleman, University of New Mexico School of Medicine on August 23rd, 2026.
Apple cider vinegar (ACV) can modestly lower post-meal blood sugar levels when consumed around mealtimes. ACV contains acetic acid, which may enhance insulin sensitivity and slow carbohydrate absorption. A small study in 2018 found that consuming 2 tablespoons of ACV before bedtime reduced fasting blood glucose by 4-6% in people with type 2 diabetes. The effect is small compared to prescription medications. Whether ACV should be taken some time before meals or with meals has not been established. It must be diluted in water to prevent tooth enamel damage. While the use of ACV is of interest, it should complement, not replace, proven diabetes management strategies like medication, diet, and exercise.
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