Nira Fit

Medical sources

Where the calculations and recommendations you see in the app come from.

These formulas and ranges provide a general starting point and don't replace your dietitian's clinical judgment or professional medical advice.

Resting-calorie (BMR) estimate

Calorie targets start from the Mifflin-St Jeor equation, the formula most commonly recommended for healthy adults.

Mifflin MD, St Jeor ST, Hill LA, Scott BJ, Daugherty SA, Koh YO. A new predictive equation for resting energy expenditure in healthy individuals. Am J Clin Nutr. 1990;51(2):241-247.

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Activity-level multiplier

The resting-calorie estimate is scaled by an activity multiplier (sedentary to very active), based on physical activity level coefficients.

National Academies of Sciences, Engineering, and Medicine. Dietary Reference Intakes for Energy. Washington, DC: The National Academies Press, 2023.

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Safe minimum calorie reference

1,200 kcal/day (female) or 1,500 kcal/day (male) are commonly cited minimums below which a diet shouldn't be followed without close clinical supervision — a threshold worth keeping in mind when your dietitian sets a plan's calorie target.

National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK). Choosing a Safe & Successful Weight-loss Program.

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BMI categories

Body mass index (BMI) shown on your progress chart uses the standard adult BMI category cutoffs.

Centers for Disease Control and Prevention (CDC). Adult BMI Categories.

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Supplement dose ranges

AI-suggested supplement doses are generated from typical-dose and upper-limit reference guidance for common supplements. Your dietitian reviews and can adjust every suggestion before it's added to your schedule — the AI proposes a starting point, it doesn't make the final call.

National Institutes of Health, Office of Dietary Supplements (ODS). Dietary Supplement Fact Sheets.

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