Lipoly
Your Fat Loss Sprint Guide
Same 50-year-old Harvard science. Higher protein targets. Built-in refeeds. Mandatory maintenance. $29.99/month — or $149.99 once.
PSMF is one of the most rigorously researched rapid fat loss protocols available. First developed at Harvard Medical School in the 1970s by Dr. George Blackburn and Dr. Bruce Bistrian, it has been studied in hundreds of published trials and is endorsed by NICE, EASO, and AHA/ACC.
The problem is access. Supervised PSMF programs at weight management clinics typically cost $1,000–$5,000 per protocol (pricing varies by provider, duration, and location). Most people run it DIY with spreadsheets, Discord servers, and the r/PSMF wiki. That works — but it's manual, error-prone, and leaves refeeds, maintenance, and tracking entirely up to you.
Lipoly productises the protocol. Enter your stats. The app calculates your Sprint Level, assigns your exact daily targets (protein from LBM, not IBW — a more precise and protective calculation), schedules your refeeds, tracks your habits and supplements, and transitions you automatically into the mandatory Maintenance Phase when your sprint ends.
It's the PSMF spreadsheet — built into an app, with 50 years of science behind it.
| PSMF Coaches / Clinics | Lipoly | |
|---|---|---|
| Protocol | Classic PSMF (1.2–1.5 g/kg IBW, 400–800 kcal) | Fat Loss Sprint — upgraded PSMF (2.2–3.0 g/kg LBM, 800 kcal floor) |
| Protein calculation | Ideal body weight-based | Lean body mass-based — more precise, higher absolute target |
| Calorie floor | 400–800 kcal (varies) | 800 kcal minimum — hard floor for safety |
| Cost | Typically $1,000–$5,000 per program (varies by provider) | $29.99/month · $149.99 lifetime |
| Accessibility | Appointment-based, often waitlisted | Instant access at lipoly.app |
| Tracking | Manual / spreadsheet / check-ins | Full daily app: macros, habits, training, supplements |
| Training program | Varies by coach | Built-in structured FLS strength program |
| Refeeds | Manually scheduled by coach | Auto-scheduled per Sprint Level |
| Maintenance phase | Coach-dependent | Mandatory 14-day phase built into protocol |
| Resource library | Coach guidance | 28 scientific resource pages with full citations |
| AI meal planner | None | Plan meals in plain English to hit your daily targets |
The Fat Loss Sprint modernises the Classic PSMF in three meaningful ways:
Classic PSMF: 1.2–1.5 g/kg ideal body weight. Fat Loss Sprint: 2.2–3.0 g/kg lean body mass.
LBM-based targets are more accurate than IBW — they account for actual muscle mass, not estimated ideal weight. And the higher absolute target (well above the lean mass preservation threshold) provides an additional margin of protection during severe restriction.
Classic PSMF protocols in the literature operated at 400–800 kcal. The 1970s cardiac deaths occurred at sub-400 kcal with no electrolyte support. The FLS sets a hard 800 kcal minimum as a safety modification, keeping the protocol within the well-studied range while avoiding the lowest-intake risk zone.
Classic PSMF transitions are coach-dependent. The FLS has a mandatory 14-day Maintenance Phase hard-coded into the protocol — you cannot start another sprint until it's complete. Recovery is not optional.
See your numbers
Sprint level, calculated macros, and a recommended duration — based on your body composition.
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