GLIM Malnutrition Criteria

Diagnose malnutrition using the Global Leadership Initiative on Malnutrition (GLIM) criteria (2018). Requires at least 1 phenotypic criterion AND at least 1 etiologic criterion. Phenotypic: unintentional weight loss (above 5% in 6 months or above 10% in more than 6 months), low BMI (below 20 if under 70 years, below 22 if 70 or older), or reduced muscle mass. Etiologic: reduced food intake/absorption, or inflammation/disease burden.

Weight
Height
Clinical Guidance

BMI is a screening measure of body size, not a direct measure of body fat. The standard WHO categories are underweight (<18.5), normal (18.5–24.9), overweight (25–29.9), and obese (≥30).

BMI can overestimate body fat in athletes with high muscle mass and underestimate it in older adults with low muscle mass. Interpret it alongside waist circumference and clinical context rather than as a standalone diagnosis.

⚕ Clinical Disclaimer: These calculators are for educational and reference purposes only. Always verify results with qualified clinical judgment and current clinical guidelines. Do not use as a sole basis for medical decisions.
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How It Works

Diagnose malnutrition using the Global Leadership Initiative on Malnutrition (GLIM) criteria (2018). Requires at least 1 phenotypic criterion AND at least 1 etiologic criterion. Phenotypic: unintentional weight loss (above 5% in 6 months or above 10% in more than 6 months), low BMI (below 20 if under 70 years, below 22 if 70 or older), or reduced muscle mass. Etiologic: reduced food intake/absorption, or inflammation/disease burden

Each component has a specific meaning:

  • Global Leadership Initiative on Malnutrition criteria — The global leadership initiative on malnutrition criteria recorded for the scenario being assessed.

Note: Interpret the glim criteria result against the thresholds and context described above.

How to Use

Enter the Global Leadership Initiative on Malnutrition criteria for the scenario you are assessing. Diagnose malnutrition using the Global Leadership Initiative on Malnutrition (GLIM) criteria (2018). Requires at least 1 phenotypic criterion AND at least 1 etiologic criterion. Phenotypic: unintentional weight loss (above 5% in 6 months or above 10% in more than 6 months), low BMI (below 20 if under 70 years, below 22 if 70 or older), or reduced muscle mass. Etiologic: reduced food intake/absorption, or inflammation/disease burden. Use the glim criteria result to inform your calculation.

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Frequently Asked Questions