Summary: In a small 6-week trial in overweight Korean adults, daily barley-based cereal improved body weight, BMI, and glycated albumin compared with corn-based cereal, with within-group reductions in body fat, waist, and LDL cholesterol in the barley arm.
PICO Summary
| Element | Detail |
|---|---|
| Population | 30 overweight adults (mean age 43; 36.7% female); 6-week randomised trial, South Korea. |
| Intervention | Barley-based cereal (high β-glucan), ~50 g available carbohydrate in 190 mL milk daily (n=15). |
| Comparison | Corn-based cereal, similar carbohydrate load (n=15). |
| Outcome | Between groups, barley favoured body weight (-0.33 vs +0.85 kg; difference -1.18 kg; p=0.027), BMI (difference -0.17; p=0.014), and glycated albumin (difference -0.87%; p=0.032). Within the barley group, body fat (-1.03%), waist (-3.64 cm), and LDL (-10.57 mg/dL) fell; the corn group gained weight and body fat and lost HDL. |
Barley vs corn cereal in overweight adults
RCT · overweight adults · 6 weeks
Over 6 weeks, barley cereal cut body weight, BMI, and glycated albumin versus corn cereal in overweight adults. A small, short trial, so treat it as dietary guidance rather than a clinical claim.
Expert Commentary
This is a tidy, mechanistically sensible nutrition trial showing that swapping a refined cereal for a high-fibre barley one nudges metabolic markers in the right direction over just six weeks. The biology is well-trodden, barley β-glucan is a viscous soluble fibre that slows gastric emptying, blunts glucose excursions, enhances satiety, and can lower LDL, so the favourable shifts in weight, glycated albumin, and the within-group LDL and waist reductions are coherent rather than surprising. The contrast is sharpened by the corn arm actually worsening on several measures, which underlines that the choice of cereal matters. My caveats are about magnitude and scale. With only 30 participants over six weeks, this is a small, short study reporting modest between-group differences and a number of within-group findings that are more vulnerable to chance, and the population is specific. It also tells us about a food swap, not a drug. Can I use this with my patients? Yes, comfortably, as dietary advice rather than a clinical claim. It supports steering overweight patients toward high-fibre wholegrain options such as barley in place of refined cereals, as one small, low-risk lever within a broader dietary pattern.
References
Kang I, Jang H, Gim M, et al. Barley-based cereals enhance metabolic health and satiety in overweight Korean adults: a randomized trial. Nutrients. 2025;17(17):2801. doi:10.3390/nu17172801