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Information on Caffeine & Blood Sugar Levels

Duke University researcher James D. Lane, Ph.D. conducted a study that measured the effect of caffeine intake on 10 Type 2 diabetics. The participants ingested 500 mg. of caffeine daily--roughly equivalent to five cups of coffee--in two doses. The diabetics had higher blood sugar levels when they had caffeine.

  1. Significance

    • Caffeine caused little change when the participants had fasted, but triggered a significant rise in blood sugar levels when accompanying a meal.

    Function

    • Caffeine likely interferes with the release of insulin instead of directly affecting glucose levels, according to Maria Collazo-Clavell, M.D. of the Mayo Clinic. Insulin keeps glucose (blood sugar) levels in normal ranges.

    Potential

    • Mike Adams, editor for "Natural News," advises diabetics to avoid diet pills that contain caffeine. The caffeine can interfere with weight loss by elevating glucose levels.

    Expert Insight

    • Dr. Lane speculates that diabetics who avoid caffeine may see a moderate, long-term drop in glucose levels.

    Theories/Speculation

    • Dr. Lane theorizes caffeine might stimulate the release of adrenaline and raise blood sugar levels. Coupled with its ability to inhibit insulin release, caffeine can significantly impact glucose levels.

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