Nutrition & Metabolic Health

Purpose

Scope

Requirements

• Professionals must distinguish general nutrition education, individualized nutrition support and therapeutic or medical nutrition therapy, and act within their actual Scope of Practice.
• General nutrition education ≠ medical nutrition therapy. Terms such as “medical nutrition therapy” may have jurisdiction-specific professional or legal meanings. IHPSO uses the term here to mark a therapeutic boundary, not to create a universal legal definition. A general nutrition recommendation does not automatically establish authority to treat diagnosed disease through nutrition therapy.
• Nutrition-related recommendations must consider purpose, person, context, available evidence and relevant risk. A dietary pattern is not appropriate for every person solely because of its label.
• Claims relating to nutrition and metabolic health must comply with H-01 Health Information & Claims and U-03 Evidence & Scientific Communication. Claim strength must not exceed evidence strength.
• Short-term changes in glucose, insulin, ketones, weight or other metabolic measurements must not automatically be communicated as demonstrated long-term improvement in health, disease risk or lifespan.
• Biomarkers and laboratory data must be interpreted in accordance with H-02 Biomarkers & Laboratory Data. A better marker is not automatically a better outcome.
• Consumer CGM, wearables and algorithmic metabolic scores must be interpreted in accordance with H-03 Wearables & Consumer Health Technology. Such data may be useful within their validated or intended context of use, but must not automatically be converted into diagnosis, food intolerance, metabolic dysfunction or therapeutic necessity. Consumer data ≠ automatic diagnosis.
• Professionals must distinguish population recommendations from individualized requirements. General guidelines or average requirement values are not automatically individual targets.
• Energy intake, macronutrient distribution, micronutrient intake and other nutrition parameters must not be presented as universally optimal without sufficient context.
• Nutritional adequacy and individual optimization are different goals. A dietary pattern may be broadly adequate without being “optimal” for every performance, weight or health claim.
• Energy intake should not be assessed in isolation from energy expenditure, training load and recovery demands. Persistent low energy availability may represent a relevant health and performance risk and may require additional professional assessment or referral.
• Restrictive dietary patterns, elimination diets, substantial energy restriction or other major restrictions require appropriate consideration of benefit, uncertainty, nutritional adequacy, duration, individual risk and monitoring within professional scope.
• A subjective or short-term response to an elimination diet does not automatically establish allergy, intolerance or disease. Elimination response ≠ proof of allergy, intolerance or disease.
• Within the IHPSO Safety Framework, fasting and time-restricted eating are treated as Dose/Exposure interventions. This is an internal safety-thinking model and not a universal clinical taxonomy. Duration, frequency, total energy intake, hydration, physical exertion, medications, health status and combinations may change the risk profile.
• More restriction is not automatically more benefit. Longer or more intensive fasting must not be presented as more appropriate solely because a stronger metabolic response is expected.
• Body weight can be clinically relevant, but it is not a complete measure of health. Weight change is not automatically equivalent to improvement or deterioration in health. Claims should identify the relevant outcome and context.
• Weight-management communication should be factual, non-stigmatizing and free from unsupported promises. Body weight or body shape must not be presented alone as a complete indicator of health, discipline or professional suitability.
• Where recommendations involve supplements or fortified products, H-04 Supplements & Nutritional Interventions also applies.
• Potential interactions between nutrition, fasting, supplements, medications, alcohol, exercise, heat, cold or other stressors must be considered within professional competence. Assess the stack, not only the parts.
• Particular life stages or higher-risk situations may create additional nutrition and professional-support requirements. Depending on context, these may include pregnancy, breastfeeding, growth, older age, high training load or athletic context, medical conditions, eating-disorder risk or changes in medication use; H-05 does not constitute a universal clinical risk list.
• Signs, statements or behavioral patterns suggesting possible problematic eating behavior, substantial undernutrition, persistent low energy availability or other relevant health risk must not be dismissed. Professionals do not diagnose an eating disorder or RED-S/low-energy-availability condition outside their scope, but must recognize relevant boundaries and warning signs and refer appropriately.
• For individualized nutrition interventions, relevant responses and outcomes should be monitored appropriately. A plan should be reviewed and modified, referred or stopped where new risks, substantial adverse responses or relevant changes arise.
• Previous tolerance of a nutrition or fasting intervention does not prove future safety when health status, restriction level, activity, medication or other context changes.
• Professionals must not use testimonials, before-and-after images or individual success stories as substitutes for appropriate evidence supporting general nutrition or weight-loss claims.
• Where an IHPSO Evidence Classification is used, it must apply to a specific Nutrition, Fasting, Metabolic or Outcome claim and must not be assigned broadly to an entire dietary pattern.