Researchers ran a three-arm randomized trial in 209 adults at elevated risk of type 2 diabetes, comparing an intermittent fasting plus early time-restricted eating plan with daily calorie restriction and standard care.

After 6 months, the post-meal glucose area under the curve fell by about 10 mg/dL*min in the intermittent fasting group versus about 3.6 mg/dL*min in the daily calorie restriction group, showing larger improvement in glucose handling. The difference was not maintained at 18 months.

In this randomized trial, 54 adults with metabolic-associated fatty liver disease followed either a 5:2 intermittent fasting plan or a daily calorie restriction plan for 12 weeks.

After treatment, the share of participants with moderate or severe liver fat was 29.6% in the 5:2 group versus 59.3% with daily restriction, and advanced fibrosis (stage F2 or worse) was 3.7% versus 25.9%. Liver fat and stiffness measures were also lower in the 5:2 group, indicating better metabolic liver health.

Overweight women were randomized to a 25% overall energy restriction delivered either as two very low-energy days per week or as daily restriction for 3 months, followed by a 1-month maintenance phase.

The insulin-resistance score dropped by roughly 0.34 to 0.38 units in the intermittent groups, compared with about 0.2 units in the daily restriction group, showing a larger improvement in insulin sensitivity with intermittent restriction.

This randomized trial compared two low-energy days per week with continuous daily restriction in 107 premenopausal women.

Weight loss was similar between groups, but fasting insulin fell more with intermittent restriction by about 1.2 units, and the insulin-resistance score was lower by about 1.2 units compared with daily restriction, indicating better insulin sensitivity.

Adults with overweight or obesity and mild to moderate high triglycerides were randomized to three very low-calorie days per week or daily calorie restriction for 8 weeks.

At week 8, the insulin-resistance score was about 3.5 in the intermittent group versus about 4.3 in the continuous group, indicating better insulin sensitivity with intermittent restriction. Weight loss and triglyceride reductions were similar between groups.

This meta-analysis pooled 11 randomized trials comparing intermittent restriction (2 to 3 days per week) with daily restriction in adults with overweight or obesity.

Intermittent restriction produced about 0.95 kg more weight loss and about 1% more percent weight loss, plus larger reductions in fasting insulin (about 1.14 units) and the insulin-resistance score (about 0.22 units), indicating stronger metabolic improvement.

This meta-analysis compared intermittent versus continuous energy restriction across 20 randomized trials in people with metabolic-syndrome risk factors.

Intermittent restriction increased HDL cholesterol by about 0.03 mmol/L and reduced body weight by about 0.8 kg more than continuous restriction, alongside slightly larger reductions in body fat and fat-free mass.

Overweight adults were randomized to intermittent restriction (two very low-energy days per week) or continuous restriction and followed until they achieved a matched 5% weight loss.

After a 7-day weight-stabilization period, the six-hour post-meal triglyceride response dropped from 106 to 68 units with intermittent restriction but rose from 117 to 130 with continuous restriction, indicating better post-meal lipid handling with intermittent fasting.