EXPLAINER: What Happens to Your Body in 5 Days Without Ultra-Processed Food

EXPLAINER: What Happens to Your Body in 5 Days Without Ultra-Processed Food

From Health Longevity Secrets by Robert Lufkin MD

May 14, 2026 · 8 min · Episode 264

About this episode

Dr. Robert Lufkin explains the physiological changes that occur in the body after quitting ultra-processed food for five days.

Ultra-processed food makes up over half the calories Americans eat - and over 60% for kids. Here's what the research shows happens inside your body in the first 5 days after you quit. In this episode of Health Longevity Secrets, Dr. Robert Lufkin walks through the hour-by-hour timeline: the glucose spikes that disappear within 24 hours, the insulin resistance that drops 30%+ in 48 hours, the gut microbiome that reorganizes in 3 days, the blood pressure that falls 6-8 mmHg in a week, and the N...

People in this episode

Host: Robert Lufkin

Topics covered

  • ultra-processed food
  • health effects
  • nutrition
  • gut microbiome
  • insulin resistance
  • blood pressure

Keywords

  • ultra-processed food
  • glucose spikes
  • insulin resistance
  • gut microbiome
  • blood pressure
  • health
  • nutrition

Mentioned in this episode

Organizations: Americans

More episodes of Health Longevity Secrets

Explore listener stats, chart rankings, contacts and more on the Health Longevity Secrets podcast page.