Research

Hormonal

Intermittent Energy Restriction (IER) does not provide superior improvements in cardiovascular risk markers (lipids, glucose, insulin, blood pressure) compared to Continuous Energy Restriction (CER) over the long term.

Do not expect IER to give you better blood work (cholesterol, blood sugar) than continuous calorie restriction. Any improvements in these markers are likely due to the weight loss itself, not the fasting pattern. Focus on achieving and maintaining a healthy weight through whichever method you can sustain.

ModerateRefutesMEDIUM confidence
Blood lipid concentrations, glucose, and insulin were not altered by intermittent energy expenditure in values greater than those seen with continuous energy restriction.
Michelle Louise Headland et al. · Nutrients · 2016

Why this rating

Meta-analysis data, but limited by heterogeneity and small sample sizes in individual trials.

Source

Weight-Loss Outcomes: A Systematic Review and Meta-Analysis of Intermittent Energy Restriction Trials Lasting a Minimum of 6 Months

Michelle Louise Headland et al. · Nutrients · 2016

DOI 10.3390/nu8060354

Meta-analysis · 9 studiesCited 112×
Read the paper
DOI resolved against Crossref · corpus check 2026-06-10

This is one finding among thousands. Every one is graded and traced to its source, so you can see what the evidence actually supports. Browse the research →