Protein with a smaller appetite: what the evidence supports

The short version: when appetite drops and you eat much less of everything, protein falls with it — and protein is the nutrient most consistently linked to keeping lean mass during weight loss. Research in dieting adults commonly supports intakes around 1.2–1.6 g per kilogram of body weight per day, well above the baseline recommended intake, with the higher end studied alongside resistance training.

What the evidence says

The baseline adult recommendation (around 0.8–0.84 g/kg/day) is set to prevent deficiency, not to support weight loss. Studies of people in an energy deficit repeatedly find better lean-mass retention at higher intakes: a frequently cited trial (Longland 2016) found that a higher-protein diet during a hard deficit, combined with resistance exercise, retained more lean mass and lost more fat than the same deficit with standard protein. Reviews of this literature generally land in the 1.2–1.6 g/kg range for dieting adults, sometimes higher for very lean or very active people.

That is a *researched range*, not a prescription — individual needs differ, and anyone with kidney disease or other medical conditions should agree an intake with their own clinician or a dietitian.

Why it's hard on a suppressed appetite

Protein-rich foods are filling — which is exactly the problem when you're barely hungry. Eating 110 g of protein inside a small day of food takes planning that hunger used to do for you. The practical failure mode is defaulting to easy, low-protein foods because nothing appeals.

What that looks like in NZ food

For someone aiming at, say, 100 g/day: 200 g of chicken breast (~60 g), a pottle of Greek yoghurt (~10 g), two eggs (~12 g), a cup of milk (~9 g) gets most of the way. Workhorses on NZ shelves: eggs, milk and yoghurt, cottage cheese, canned tuna and salmon, lean mince, tofu, frozen edamame, legumes. Spreading protein across the day beats one large evening dose when appetite is limited, and liquid options (milk-based) are often easiest when solid food doesn't appeal.

What we still don't know

The ideal intake *specifically* during GLP-1 treatment hasn't been pinned down by dedicated trials yet — the ranges above come from the broader weight-loss literature. Trials in this exact population are underway; we'll report them when they publish.