Sugar rationing during the first 1000 days and Early-Onset Cancer: A Natural Experiment

Area of Science:

• Nutritional Epidemiology
• Oncology
• Public Health

Background:

• The "First 1000 Days" are crucial for metabolic programming.
• Long-term cancer risks from early nutrition are understudied.

Purpose of the Study:

• To assess if restricted sugar intake in early life reduces early-onset cancer risk and mortality.
• Utilize a natural experiment of sugar rationing in the UK.

Main Methods:

• Analyzed 63,819 UK Biobank participants born 1951-1956.
• Quasi-experimental birth cohort design comparing rationing exposure.
• Ascertained cancer incidence and mortality via national records.

Main Results:

• Early-life sugar restriction reduced early-onset cancer risk (HR 0.66).
• Observed a dose-response relationship, with peak protection up to 24 months postnatally.
• Protection was systemic across solid tumors; null for negative controls.

Conclusions:

• Restricted early-life sugar intake is linked to reduced early-onset cancer risk.
• Findings suggest early diet influences tumor latency, not aggressiveness.
• Highlights potential of dietary guidelines for early-onset cancer prevention.