A series of recent analyses is redrawing the line between dietary supplements and whole foods for three nutrients that dominate wellness conversations: magnesium, protein and fibre. A 2023 review of legume consumption, cited by public-health researchers in Australia and the United States, found that each additional 50 grams of pulses eaten daily was associated with a 6 per cent lower risk of all-cause mortality during the study periods. At the same time, European Union health authorities have authorised claims for magnesium only in relation to normal energy metabolism, muscle function and reduction of tiredness — not for sleep quality or cramp prevention, for which clinical evidence remains limited. A recent clinical trial in adults with poor sleep showed only a modest reduction in the time needed to fall asleep, and the EU has not approved any sleep-related health claim for the mineral.

Nutrition scientists at the University of California, San Diego, and Penn State point to a practical hurdle: few single foods deliver both protein and fibre in the quantities that Western diets often lack. Pulses — chickpeas, lentils, dried beans — top their list, with half a cup of cooked lentils providing roughly 9 grams of protein and 8 grams of fibre. Soy foods, including edamame and tofu, offer a similar dual benefit, while a handful of peanuts or almonds supplies meaningful amounts of both nutrients alongside heart-healthy unsaturated fats. The same pattern holds for magnesium. A single cup of cooked spinach delivers 156 milligrams, or 37 per cent of an adult male’s daily requirement, far exceeding the 32 milligrams in a banana. Pumpkin seeds, chia seeds, almonds and black beans all outrank the fruit, nutrition researchers in Latin America note, and their magnesium is absorbed as part of a food matrix that also contains fibre and other co-factors.

The creatine picture adds a further dimension. A review in Food Chemistry: Molecular Sciences confirms that dietary creatine comes almost exclusively from animal products — herring, red meat, tuna, salmon — but cooking can degrade part of the content. While a diet rich in these foods can raise intake, reaching the 3–5 grams per day used in performance studies typically requires large, sustained portions. For vegetarians and vegans, whose dietary creatine is negligible, supplementation produces more marked responses, but for the general population the review suggests that food-first strategies remain the realistic baseline.

Viewed from São Paulo, the commercial push behind magnesium salts — citrate for constipation, bisglycinate for sleep, malate for fatigue — is outpacing the evidence. “That recipe book of salts is today more a marketing strategy than a scientific conclusion,” researchers there observe, noting that a supplement cannot compensate for a poor diet. The next factual milestone will be the publication of larger, objective-sleep-measure trials on magnesium, alongside updated dietary guidelines in several jurisdictions that are expected to raise the recommended intake of fibre and to prioritise whole-food sources over fortified products.