Under fixed-order conditions, temporal responses of most segmental multi-frequency BIA outcomes were similar after 600 mL water and 300 g banana intake, while a small time × condition/day interaction was seen for visceral fat area estimate; findings need confirmation in randomized, counterbalanced studies with a no-intake control.
Time × experimental condition/day interactions were not significant for body fat percentage, total body water percentage, or trunk impedance at 20 or 100 kHz.
A significant time × condition/day interaction was observed for visceral fat area estimate.
The between-condition/day difference in visceral fat area estimate was small, with the largest adjusted difference of 0.858 cm² at 30 minutes.
The study measured segmental multi-frequency BIA in 98 healthy young adults at baseline and 30, 60, and 90 minutes after water (day 1) and banana (day 2) intake.
Because intake condition was fixed by study day, condition effects cannot be separated from day or order effects, and there was no no-intake control.
This study looked at whether drinking water or eating a banana shortly before a body composition scan changes the results of a bioimpedance device, which sends a small electrical current through the body to estimate things like body fat and body water. Ninety-eight healthy adults aged 21-33 were measured before and at 30, 60, and 90 minutes after drinking 600 mL of water on one day and eating 300 g of banana on another day. For most measures, including body fat percentage, total body water percentage, and trunk impedance at two frequencies, the pattern of change over time did not differ clearly between the water day and the banana day. One estimate, visceral fat area, did show a statistically significant difference in its pattern, but the difference was small (at most about 0.86 cm² at 30 minutes). This research suggests that short-term water or banana intake has limited differential effects on most of these measurements in healthy young adults. However, water was always tested on day one and banana on day two, and there was no control day without intake, so effects of the food or drink cannot be separated from effects of the day or order. The authors say randomized, counterbalanced studies with a no-intake control are needed to confirm the findings.
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Upload Your LabsČermáková E, Kunzová M, Olejníčková J, Loskot P, Forejt M. (2026). Short-Term Changes in Segmental Multi-Frequency Bioelectrical Impedance Measurements Following Water and Banana Intake: A Fixed-Order Within-Subject Study.. International journal of medical sciences. https://doi.org/10.7150/ijms.134700