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ProLon & ReSet: the Mar batch is completely sold out. Please note that any order you place now is pre-order, delivery date TBD, though it does enjoy first priority in being fulfilled.   

Expected delivery: 2024 Apr-end, May-start (subject to change)


Fast Bar is the latest addition to the fasting-mimicking diet family. For ProLon users, please note that Fast Bar serves a different fasting purpose and is not intended as a substitute for ProLon. 


How is it different from ProLon?

ProLon is a prolonged, 5-day fasting program. User is expected to complete the 5 days without any disruption. 


Fast Bar supports short, intermittent fasting programs - for example, 16/8 fasting (i.e. eating only within an 8-hour window), 1-day fasting, alternative-day fasting, water-only fasting. It is good for those who wish to get the benefits of fasting but cannot commit to extended fasting programs. 


Scientific findings of Fast Bar were published in the leading scientific journal, Nature. Benefits were observed in a randomized, controlled study in 108 adults after a 15-hour overnight fast.


How to use Fast Bar?

For Intermittent Fasting

  • Within the fasting window to curb hunger
  • At the start or the end of the fasting window to provide nutritional nourishment for your body
  • To extend your fasting duration (say from a 16-hour to 24-hour fast, or 1-day to 2-day fast)


As Breakfast Substitutes

  • Ride on and extend your "natural fast" after a night of sleep. Provide easy and ample opportunities each day for intermittent fasting without sacrificing nutritional nourishment or feeling low in energy in the morning


As Healthy Snacks

  • Planted-based, healthy fats, fiber-rich, high-quality nuts containing both macro- and micro-nutrients, with no added sugar  



Fast Bar

Out of Stock
Price Options
One-time purchase
Delivered every month with no hassle
HK$349.00every month until canceled
  • Expiration: Mar 2024 


    Shipping & Payment: Credit cards are accepted. Payment is settled in HKD regardless of your location; referenced price in your local currency is for reference only.


    Shipping Address: Please ensure availability during business hours (9am-6pm)


Dr. Amy Savagian, MD

Triple Board: Internal, Integrative and Obesity Medicine

“I love the science supporting ProLon, and I love that the science has been published in multiple peer reviewed journals. It allows me to suggest ProLon with confidence. I have used fasting and time restricted eating in my practice for years; ProLon augments this and takes it to the next level.”


Dr. William Hsu, M.D


Former Professor, Havard Medical School 

Former Director of Asian Clinic, Joslin Diabetes Center

Currently Chief Medical Officer, L-Nutra, Inc.

“ProLon carries so many weight, metabolic and cellular benefits that not only do I recommend it, but I decided to join the company’s mission full time as Chief Medical Officer”

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