Lipoly
Your Fat Loss Sprint Guide
One is a pharmaceutical intervention that works through appetite regulation. The other is a time-limited dietary protocol that works through caloric restriction and ketosis. Different mechanisms. Different timelines. Different people.
GLP-1 medications work by mimicking a naturally occurring gut hormone — glucagon-like peptide-1 — that signals fullness and slows gastric emptying. The result is reduced appetite and lower caloric intake, without requiring the person to consciously restrict food. The weight loss effect is pharmacological: the drug changes the hormonal environment that governs hunger.
These medications are typically prescribed for ongoing use. Clinical trials (STEP 1, 2021) show meaningful weight loss during treatment; the mechanism requires continued use to maintain its effect.
The Fat Loss Sprint works through a different mechanism entirely: deliberate, structured caloric restriction combined with very high protein intake and resistance training. By reducing calories to a calculated target — 800 kcal minimum, with the ceiling set by your body composition — from high-protein whole foods, the body enters nutritional ketosis and draws primarily on stored fat for fuel. High protein (2.2–3.0 g/kg lean body mass) preserves muscle during the restriction. Resistance training provides the mechanical stimulus that makes the protein signal effective.
The protocol is time-limited by design: 14, 21, or 28 days based on your body composition, followed by a mandatory 14-day Maintenance Phase at normal calories. It is a defined sprint — not a long-term treatment.
| GLP-1 Medications | Lipoly Fat Loss Sprint | |
|---|---|---|
| **How it works** | Hormonal appetite suppression via GLP-1 receptor agonism | Caloric restriction + nutritional ketosis + high protein intake |
| **Duration** | Ongoing treatment — designed for long-term use | Time-limited: 14–28 day sprint + 14-day mandatory recovery |
| **Who prescribes it** | Physician — prescription required | Self-directed app — no prescription; consult your doctor |
| **Protein focus** | Not specifically addressed in the protocol | Central: 2.2–3.0 g/kg LBM — calculated from your body composition |
| **Training requirement** | Not specified | 2x/week structured strength training — required |
| **Habit building** | Weight management is medication-supported | Mandatory 14-day Maintenance Phase locks in results and builds post-sprint eating patterns |
| **Refeed structure** | Not applicable | Scheduled mid-sprint and final-day refeeds — built into the protocol |
| **Evidence base** | STEP trials (2021–); robust pharmaceutical trial data | 50+ years PSMF clinical research; Purcell et al., *The Lancet*, 2014 |
| **Endorsed by** | FDA (US), EMA (EU), NICE (UK) for eligible candidates | NICE (UK), EASO, AHA/ACC endorse VLCD/PSMF protocols |
| **Suitable for** | Adults with BMI ≥30, or ≥27 with comorbidities — as prescribed | Same BMI range, self-directed; contraindications apply |
Neither approach is universally right. They suit different situations.
Both approaches should be discussed with your doctor — particularly if you have pre-existing health conditions, take any prescription medication, or are managing a metabolic condition.
The Fat Loss Sprint is built on the Protein-Sparing Modified Fast — a clinical protocol developed at Harvard Medical School in the 1970s. Key published findings:
**Purcell et al. (The Lancet Diabetes & Endocrinology, 2014):** 81% of participants on a rapid structured protocol achieved a clinically significant weight loss target — compared to 50% on a gradual approach. Dropout rate: 3% vs. 18%.
**DiRECT Trial (Lean et al., The Lancet, 2018): Structured very low calorie diet achieved type 2 diabetes remission in 46% of participants at 12 months** — generating significant clinical interest in structured dietary protocols as a metabolic intervention.
**Longland et al. (AJCN, 2016):** High protein intake (2.4 g/kg/day) with resistance training at a 40% caloric deficit resulted in simultaneous fat loss and lean mass preservation — the evidence base for Lipoly's protein and training requirements.
668-patient PSMF case series: mean weight loss 18.6 kg; significant reductions in blood pressure and triglycerides.
Zero deaths documented in modern supervised PSMF protocols using complete protein and electrolyte supplementation (Seim & Flanagan, 1984; Wadden et al., 1990). Endorsed by NICE (UK), EASO, and AHA/ACC for appropriate candidates.
A pattern emerging in clinical practice: people who have used GLP-1 medications and then stopped — or who are tapering — use a structured dietary protocol like the Fat Loss Sprint to maintain results and build the eating habits that support long-term weight management.
The sprint provides a defined structure during the transition. The mandatory Maintenance Phase that follows locks in results and builds the eating patterns that support them long-term. This is a conversation to have with your doctor.
Lipoly is not a medical device and does not replace physician-prescribed treatment. If you are taking prescription medication, do not stop or adjust your medication without speaking to your doctor first. This page presents both approaches informally for educational purposes — consult your doctor about what is right for your situation.
See your numbers
Sprint level, calculated macros, and a recommended duration — based on your body composition.
Free 7-day trial · No charge today · Cancel anytime