The 5:2 diet is a form of intermittent fasting involving severe calorie restriction for two non-consecutive days per week. This periodic energy deficit is believed to activate key cellular repair and stress resistance pathways, such as autophagy and NRF2. By improving insulin sensitivity and reducing inflammation, this approach aims to enhance metabolic flexibility and combat drivers of age-related disease.
Verdict
A practical entry point to fasting's metabolic benefits.
HEALTHSPAN IMPACT
High Value
RISK LEVEL
Very Low
EVIDENCE GRADE
B
MONTHLY COST
$0 - $0
Protocol
- Eat a normal, healthy diet for five days of the week.
- Restrict calorie intake to approximately 500-600 calories on two non-consecutive days.
Flags
- Not recommended for individuals with a history of eating disorders.
- Consult a physician if you are pregnant, breastfeeding, or have diabetes.
- May cause temporary side effects like fatigue, irritability, or headaches on fasting days.
- Long-term adherence can be a significant challenge for some individuals.