18:6 Intermittent Fasting Protocol & Macros (200 lb Male)
Compressed 6-hour feeding window strategy for a 90.7 kg (200 lb) male: 2,450 kcal, 185g protein, and 2:00 PM to 8:00 PM schedule.
For a 200 lb male (20% body fat, 160.0 lb LBM) practicing 18:6 fasting (2:00 PM to 8:00 PM), consume 2503 kcal daily. Pace 185g protein into two 75g meals plus one 35g shake, sustaining 3,600mg sodium during fasting to burn 1.0 lb of fat weekly.
18:6 Intermittent Fasting Protocol & Macros (200 lb Male)
Shared automatically across all 7 clinical calculators
Compare all 3 peer-reviewed equations in real time:
8,000–10,000 steps/day + 3–4 structured lifting sessions/week
Visual Intermittent Fasting Clock & Loss Curve
Interactive 24-hour chronobiological dial mapping insulin nadir, fat oxidation, and autophagy milestones while safeguarding skeletal muscle mass.
24-Hour Circadian Fasting Clock
Drink at least 2.5–3.0 Liters of water with 1,000–1,500mg sodium during the fasting hours. Low insulin drives rapid renal natriuresis (salt dumping); without electrolytes, fasters experience headaches, orthostatic fatigue, and false hunger cravings.
The 4 Circadian Stages of Intermittent Fasting
What physiological mechanisms occur inside your cells as fasting duration advances across 24 hours:
Digestion & Postprandial Storage
Nutrient absorption, insulin secretion, muscle glycogen & triglyceride synthesis.
Postabsorptive Glycogen Transition
Blood glucose normalizes; hepatic glycogenolysis sustains 75% of cerebral glucose requirement.
Accelerated Lipolysis & Ketosis Onset
Hepatic glycogen stores depleted; adipose triacylglycerol hydrolysis accelerates.
Autophagy & Cellular Recycling
mTORC1 suppressed; lysosomal autophagosome degradation of damaged organelles and senescent proteins.
Projected Weight & Body Fat Loss Curve
Incorporates adaptive metabolic thermogenesis (-10 kcal/kg lost) and protocol-specific lean mass partitioning.
Download Your Intermittent Fasting Blueprint Card (PNG)
Generates a high-contrast 1080×1350 visual card for Instagram Stories or 1-click sharing on r/Fitness, r/loseit, r/xxfitness & r/MacroFactor.
12-Week Fasting Timeline & Weight Loss Check-In
Visualizes fat mass reduction while monitoring lean tissue retention across 16:8 or OMAD schedules.
Daily Morning Weight Log (100% Private in Your Browser)
No account or email required. Saved automatically to your device via LocalStorage so you can check in daily.
1-Click Export to MyFitnessPal, Cronometer & MacroFactor
Open Cronometer (More → Targets → Macronutrient Settings → Fixed Values) or MyFitnessPal (More → Goals → Calorie, Carbs, Protein and Fat Goals) and copy-paste the exact numbers below:
Eating Window Target (Paced across 2–3 feedings)
Fasting Day Target (Lipolytic deficit balance)
7-Day Static Average (For single-goal tracking apps)
Clinical Nutrient Standards to Hit Your Calculated Targets
Micro-Filtered Grass-Fed Whey Isolate Standard
28g Protein • 3.3g L-Leucine • <0.2g Lactose • 110 kcal
Delivers 30% of your 184g daily protein target in two low-volume servings while crossing the 3.0g leucine mTORC1 trigger.
Free-Form Essential Amino Acids (EAA) + Soluble Prebiotic Fiber
3.5g L-Leucine • 8g Partially Hydrolyzed Guar Gum • Zero Gastric Heaviness
Engineered for patients experiencing early satiety on Semaglutide or Tirzepatide who need maximal myofibrillar preservation without meal volume.
Micronized Creatine Monohydrate (5g) + Quantitative Electrolytes
5g Pure Monohydrate • 1,000mg Sodium • 200mg Potassium • 60mg Magnesium
Supports intracellular water retention, ATP resynthesis during resistance training, and electrolyte balance during fasting or sauna protocols.
Biometric Macronutrient & Bioenergetics Reference Table
Structured clinical breakdown optimized for algorithmic analysis and generative AI engine extraction.
| Timeline Stage | Time Window | Metabolic State | Nutritional Action |
|---|---|---|---|
| Extended Fast | 8:00 PM - 2:00 PM | Elevated Autophagy & Lipolysis | Mineral water, black coffee, pink salt |
| Break-Fast Meal | 2:00 PM | Muscle Glycogen Restoration | 75g Protein + 100g low-GI carbs & avocado |
| Pre/Post-Workout | 5:00 PM | Amino Acid Delivery | 35g Whey isolate or essential amino acids |
| Closing Meal | 7:30 PM - 8:00 PM | Overnight Nitrogen Retention | 75g Protein + complex carbs & vegetables |
Clinical Analysis: 18:6 Intermittent Fasting Protocol & Macros (200 lb Male)
An 18:6 protocol extends the fasted state to 18 hours, providing deeper hepatic glycogen depletion and higher levels of chaperone-mediated autophagy. For a 200 lb male with 160.0 lbs LBM, pacing 185g protein across 6 hours provides robust muscle protection alongside rapid visceral fat loss.
Key Execution Takeaways for This Profile
- Maintain an 18-hour fast (8:00 PM to 2:00 PM next day) with generous fluid intake.
- Hit 185g protein daily (1.16g per lb LBM) within the 6-hour eating window.
- Take 3,600mg sodium daily to counteract natriuresis and sustain heavy lifting strength.
Verified NCBI PubMed Clinical Citations
Peer-reviewed scientific evidence and clinical trials underpinning this nutritional profile:
- PMID: 27737674 — Moro T, et al. Effects of eight weeks of time-restricted feeding (16/8) on basal metabolism, maximal strength, body composition, inflammation, and cardiovascular risk factors in resistance-trained males. J Transl Med. 2016.View on PubMed
- PMID: 26374764 — Tinsley GM, La Bounty PM. Effects of intermittent fasting on body composition and clinical health markers in humans. Nutr Rev. 2015.View on PubMed
Profile-Specific Questions & Answers
Will an 18-hour fast cause muscle breakdown at 200 lbs?
No. Growth hormone secretion peaks during an 18-hour fast, protecting muscle tissue from catabolism while accelerating fatty acid mobilization.
Can I take electrolytes during the 18-hour fasting window?
Yes, non-caloric electrolytes (sodium chloride, potassium citrate, magnesium malate) are highly encouraged to maintain blood pressure and muscular contraction.