Issue 03: Drink up, or your fuel stops working

Nine trained cyclists who let themselves get 2.8% of body mass down burned about 16% less of the glucose they drank, with no warning sign from the stomach at all. Also this week: a reported carbohydrate gap in female athletes, a Science review on sugars and the human brain, a plant based performance null, and a quiet week for gut science with one probiotic trial to show for it. Read the full issue on substratedigest.com, with every study, its source link and the "what this does not show" notes. More issues at substratedigest.com.

Episode metadata supplied by the publisher feed · Published Aug 10, 2026

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Issue 03: Drink up, or your fuel stops working

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