Save the date:

January 11-13, 2026

for our next 3-Day Water Fasting Challenge.

Enjoy daily live sessions with special guests, exclusive surprises, and Dr. Rob’s 3-Day Water Fasting Guide included with the Challenge.

What’s Your Metabolic Age??

Take the 2-minute quiz to estimate your metabolic age and get Dr. Lufkin’s weekly strategies to make it younger. Join free — results displayed instantly.

Enter your email (so we can send your plan)
Answer 5 quick questions
See your metabolic age and next steps

Email address

First name (optional)

Your age (years)

Fasting glucose (mg/dL) — most recent

Waist-to-height ratio (waist ÷ height)

Resting heart rate (bpm)

Sleep regularity (bed/wake ±1 hr, most nights)

Resistance training

Your Metabolic Age: —

Calculating…

How to lower it

Get your personalized 7-day plan

Educational estimate only — not medical advice. For personalized care, consult your clinician.