Evidence-based nutrition for women and families

Recommendations are not considered “evidence-based” simply because they can be linked to a study. I distinguish between different forms of evidence, including randomised trials, observational research, mechanistic studies, systematic reviews and professional guidelines, and consider what each can reasonably establish. Particular attention is given to consistency of findings, magnitude of effect, population characteristics, methodological limitations and whether the evidence is applicable to the individual question.

The relevance of a dietary intervention depends on more than nutrient intake alone. Health status, medication, laboratory findings, physiological stage, gastrointestinal tolerance, dietary pattern, supplement use, lifestyle and existing restrictions may all alter the interpretation of a recommendation. The same intervention can be appropriate in one context, unnecessary in another and potentially counterproductive in a third.

A statistically significant association is not automatically a clinically important one. I consider whether an observed effect is large enough to matter, whether the outcome itself is meaningful, whether benefit is likely to outweigh burden or risk, and whether the proposed intervention addresses an actual nutritional priority rather than a theoretical optimisation.

The relevance of any dietary recommendation depends on health status, life stage, medical treatment, habitual diet and the outcome we are trying to influence. This is why nutrition advice should be assessed in context rather than applied as a universal rule.

Food is generally the foundation of nutritional care, but “food first” should not become a dogma. Supplements may be appropriate when requirements cannot realistically be met through diet alone, when deficiency is established or likely, or when professional guidelines support their use. The decision should be based on indication, dose, expected benefit and safety rather than on whether an intervention appears more “natural”.

Most diets contain multiple opportunities for improvement, but not all deserve equal attention. I prioritise according to nutritional importance, expected impact, feasibility and individual circumstances. The objective is not to construct an idealised diet, but to identify the changes most likely to produce meaningful benefit without creating unnecessary complexity.