Cooked Leafy Greens

When every bite has to count, cooked leafy greens — spinach, kale, Swiss chard — are the most nutrient-dense calories on this list. Spinach carries just 23–26 calories per 100 grams yet delivers an outsized load of vitamins A, C, E, and K, folate, iron, and magnesium: precisely the micronutrient spectrum the Harvard Health review found GLP-1 users losing as their food intake drops. That is the whole case for greens here — not protein (they offer only 2–3 grams per 100 grams) but insurance against the quiet deficiencies that come with eating less. The word “cooked” is doing real work in the ranking. Raw salad greens are bulky and fibrous, and a big cold salad can feel like an impossible volume on a slow-emptying stomach; sautéing or steaming wilts them down to a small, soft, easily digested portion, concentrating the nutrition and removing the chewing burden. Cooked greens also fold invisibly into the foods already on this list — a handful stirred into lentil soup, scrambled with eggs, blended into a tofu smoothie — so you rarely have to eat them alone. They contribute gentle fiber for regularity, though less than oats or lentils, and almost no calories to crowd out your protein. The honest limitation is that greens are a supporting actor, not the star: they can’t carry a meal on protein, and iron from plants is absorbed better alongside a little vitamin C (squeeze on lemon) or a protein source. Paired with any of the top proteins, a small sautéed handful turns a single-note plate into a genuinely complete one.