Our Calculation & Nutritional Methodology
GoDietPlan operates as an objective, algorithmic dietary utility. We do not rely on proprietary guesswork or fad diets. Every meal plan, caloric target, and macronutrient recommendation generated by our platform is derived from peer-reviewed clinical physiology formulas, empirical metabolic modeling, and standardized food composition databases.
Standardized Equations
Mifflin-St Jeor BMR formulas validated by the American Dietetic Association as the gold standard for clinical accuracy.
Dynamic Macronutrients
Goal-specific protein, lipid, and carbohydrate partitioning aligned with ISSN and WHO dietary guidelines.
Regional Food Models
Calibrated against localized grocery cost indexes and culturally authentic regional ingredient databases.
1. Basal Metabolic Rate (BMR) Formulation
Basal Metabolic Rate (BMR) represents the minimum number of kilocalories required to sustain vital cellular functions—including respiration, circulation, central nervous system activity, and cellular turnover—at complete physical and digestive rest.
Our engine employs the Mifflin-St Jeor Equation (Mifflin et al., 1990), which systematic reviews published in the Journal of the American Dietetic Association (Frankenfield et al., 2005) established as predicting resting metabolic rate within 10% of indirect calorimetry in both non-obese and obese individuals:
2. Total Daily Energy Expenditure (TDEE) Modeling
To determine an individual's Total Daily Energy Expenditure (TDEE), the baseline BMR is modulated by physical activity level factors (PAL) established by the Food and Agriculture Organization (FAO) and World Health Organization (WHO):
| Activity Level | PAL Multiplier | Physiological Lifestyle Description |
|---|---|---|
| Sedentary | 1.200 | Desk-bound employment with minimal intentional walking or movement. |
| Lightly Active | 1.375 | Light physical exercise or sports 1–3 days per week; baseline standing. |
| Moderately Active | 1.550 | Moderate aerobic or resistance training 3–5 days per week. |
| Very Active | 1.725 | Hard training or physical athletic conditioning 6–7 days per week. |
| Extremely Active | 1.900 | Heavy manual physical labor or two-a-day competitive athletic training. |
3. Goal-Specific Macronutrient Allocation
Energy balance dictates weight trajectory, but macronutrient distribution governs body composition quality, muscular retention, hormonal stability, and cognitive performance:
Fat Loss Caloric Deficit
TDEE is reduced by a conservative 15% to 20% to maximize adipose tissue oxidation while preventing metabolic adaptation. Protein is elevated to 1.8–2.2g/kg to prevent myofibrillar catabolism.
Weight Maintenance
Caloric intake equals 100% of TDEE. Balanced macronutrient distribution: 25–30% Protein, 25–30% Healthy Fats, and 40–50% Complex Carbohydrates to optimize athletic energy and hormonal homeostasis.
Lean Muscle Hypertrophy
A controlled surplus of 10% to 15% (250–400 kcal) above maintenance ensures maximal muscle protein synthesis (MPS) without excessive visceral fat accumulation. Protein targeted at 1.6–2.2g/kg.
4. Regional Food Database & Pricing Calibration
A primary flaw of conventional dietary software is Western-centric bias—recommending ingredients (such as blueberries, avocados, or specialty powders) that are unavailable or prohibitively expensive in international markets.
GoDietPlan bridges this divide through a localized culinary model:
Scientific Literature & Primary Sources
- Mifflin, M. D., et al. (1990) — A new predictive equation for resting energy expenditure in healthy individuals. The American Journal of Clinical Nutrition, 51(2), 241–247. [PubMed ]
- Frankenfield, D., et al. (2005) — Comparison of predictive equations for resting metabolic rate in healthy nonobese and obese adults: A systematic review. Journal of the American Dietetic Association, 105(5), 775–789. [PubMed ]
- Hall, K. D., et al. (2011) — Quantification of the effect of energy imbalance on bodyweight. The Lancet, 378(9793), 826–837. [The Lancet ]
- Jäger, R., et al. (2017) — International Society of Sports Nutrition Position Stand: Protein and Exercise. Journal of the International Society of Sports Nutrition, 14, 20. [JISSN ]
- USDA Agricultural Research Service — FoodData Central Nutrient Database. [USDA FoodData Central ]