Guide
Hitting your protein target on Mounjaro on a budget
Protein does not have to be expensive on Mounjaro, and your smaller appetite is on your side: you are buying less food than you used to. The cheapest 30 g serves come from eggs, milk and milk powder, tinned fish, dried lentils, chicken thigh, mince, tofu and bulk whey. Cost per 30 g of protein is the number to shop on, not cost per kilo. Most people we coach cover a full week inside A$90 / US$60 / £47.
Your number, before anything else
Protein is what decides whether the weight you lose is fat or muscle. Work your number out once and we will keep it with you on every page here. No account, no email.
Saved in this browser only. Your dose and how you feel on Mounjaro stay between you and your prescriber.
How to shop for this
Mounjaro removes the urge to snack, so the money that used to go on biscuits and crisps is free. That is typically enough to fund a kilo of whey a month with change left over.
Start with the cheapest reliable sources
A dozen eggs is about 78 g of protein. A litre (34 fl oz) of milk is about 34 g. A 400 g (14 oz) tin of lentils is about 24 g. A 95 g (3.4 oz) tin of tuna is about 22 g. All of these cost well under A$3 / US$2 / £1.60 per 30 g serve in most weeks.
Buy the cheaper cuts and the bigger bags
Chicken thigh over breast, whole chicken over pieces, mince over steak, frozen white fish over fresh, dried lentils and chickpeas over tins. Whey in a 1 kg (2.2 lb) bag rather than single serves.
Use skim milk powder as a protein booster
Two tablespoons stirred into porridge, soup, mashed potato or a milk drink adds about 8 g of protein for a few cents. It is the cheapest protein in the supermarket and it keeps in the cupboard.
Cut the low-protein filler out of the trolley
Biscuits, crisps, juice and most snack foods bring calories you no longer have room for. Removing them usually funds the eggs, the tinned fish and the whey without spending anything extra.
Move the snack budget to the protein budget
List what you used to buy that you no longer eat on Mounjaro. That figure usually covers eggs, tinned fish and powder for the whole week.
Cost per 30 g of protein, not cost per packet
A packet of chicken breast looks expensive next to a bag of rice, but the rice brings almost no protein. The number that matters is what it costs to put 30 g of protein on the plate. On that measure eggs, milk, milk powder, tinned fish, dried legumes, chicken thigh and bulk whey all sit at the cheap end, and prepared high-protein snacks, bars and ready meals sit at the expensive end by a wide margin.
This matters more on a GLP-1 than it did before. Tirzepatide is the medication where people most often describe a very short appetite window: a few bites, then done. It is not that food is unappealing; it is that the door closes fast. Whatever goes through it first is what you get. If you can only eat four small servings a day, every one of them has to carry protein, so the low-protein cheap foods that used to fill you out are no longer earning their place in the trolley. Pooled across 20 randomised trials, 25.4% of the weight lost on tirzepatide was lean mass, against 26.2% when the same weight came off by diet alone, and 17.5% when resistance training was added. The good news is that your total grocery bill is usually falling anyway.
A cheap day at about 110 g of protein
- Breakfast: porridge made with 250 ml (8.5 fl oz) milk plus two tablespoons of milk powder, about 20 g
- Lunch: two boiled eggs and a 95 g (3.4 oz) tin of tuna on toast, about 35 g
- Afternoon: 30 g scoop of bulk whey in water or milk, about 25 to 33 g
- Dinner: 120 g (4 oz) chicken thigh with a half tin of lentils and frozen vegetables, about 35 g
Around 115 g of protein for roughly A$8 to A$10 / US$5 to US$7 / £4 to £5 a day at usual supermarket prices. Nothing here needs a specialty shop.
Work out your own target on MounjaroThree numbers, every Sunday
Cheap only counts if the protein average actually lands. These three tell you whether it did.
One strength test, same way every week
Goblet squat reps at a fixed weight, push-ups, or the 30-second sit-to-stand for beginners. Fat loss does not make you weaker, so a number that drops three or four weeks running is a real signal, and it is fixable. It measures what you can do, not how much muscle you have.
Average protein a day, whole week
Not your best day. 1.2 to 1.6 g per kg of goal body weight (0.55 to 0.7 g per lb), floor 1.2, protein first at every meal.
Upper arm tape, same spot, relaxed
Centimetres or inches. The waist shrinks whatever you do; if the arm shrinks as fast, that is muscle. Weight is number four, same day and time. The scale tells you what you lost. These tell you what you kept.
Worth a conversation with your prescriber
- Difficulty affording enough food, which is worth raising plainly, since many services can refer you for practical help
- Kidney or liver conditions, food allergies or coeliac disease, all of which change which of these foods suit you
- Any supplement you are considering, including protein powders, if you take other medications regularly
Dose and timing on Mounjaro are your prescriber's decisions; we coach the food and the strength.
Questions people ask
What is the cheapest protein to eat on Mounjaro?
Eggs, milk, skim milk powder, tinned fish, dried lentils and bulk whey. On a cost-per-30 g basis these beat every prepared high-protein product on the shelf, usually by three or four times.
Do I need protein powder to hit my target?
Not if you can eat four protein servings a day. Most people on Mounjaro cannot, and a 1 kg (2.2 lb) bag of whey is the cheapest way to close a 30 g gap, working out at well under A$2 / US$1.30 / £1 a serve.
My grocery bill has dropped on Mounjaro. Should I be worried?
Only if the protein has dropped with it. Eating less is expected. Eating less protein is what costs you muscle, so check the weekly average before you enjoy the saving.
Where these numbers come from
Cheap protein still has to clear the same two thresholds, and eggs and milk do it for less than almost anything else.
Spread across meals at roughly 0.3 to 0.4 g per kg per meal, rather than taken mostly at dinner. Arslan S, Clinical Nutrition ESPEN 2026
Each of those meals wants roughly 2.5 to 3 g of leucine, the amino acid that actually switches muscle building on. That is about 30 g of whey, 120 g of chicken breast, or four eggs. Arslan S, Clinical Nutrition ESPEN 2026
The papers these numbers come from
- Arslan S. Medical nutrition in the glucagon-like peptide-1 (GLP-1) era: Protein strategies, micronutrient monitoring, and lean mass preservation. Clinical Nutrition ESPEN, 2026. Narrative review, guideline-informed targets. doi:10.1016/j.clnesp.2026.103305
- Eisa N, Barood O. Lean Mass Changes With Incretin Therapy Versus Lifestyle Intervention: A Systematic Review and Meta-Analysis of Randomised Controlled Trials. Diabetes, Obesity and Metabolism, 2026. 20 randomised controlled trials, 15,782 participants. doi:10.1111/dom.70666
Last reviewed 18 September 2026. We update these figures when a larger or better study replaces them, and we say what changed. How we handle evidence.
The Keep Muscle Kit
The whole system for Mounjaro, in five PDFs
The workbook, Sunday numbers tracker, 2-day strength plan, injection-day card, and meal plans at 100, 120 and 140 g protein. Instant download.
A$47 / US$29 / £23, one payment.
EverStrong provides nutrition and strength coaching and education. It is not medical advice and does not replace your prescribing doctor. Consult your doctor before starting a new exercise or nutrition plan, especially with a heart, kidney, liver or metabolic condition, if pregnant, or with a history of disordered eating.