Ballast / Guides
How much protein do you need on a GLP-1?
Short answer: about 0.7 g of protein per pound of your current body weight a day (about 1.5 g per kg) is a sensible target while you are losing weight and strength training. About 0.55 g per pound (1.2 g per kg) is a reasonable floor on hard days. Ask your doctor first if you have kidney disease.
Where the number comes from
Sports-nutrition research supports 1.4 to 2.0 g per kg a day for people who train, with the benefit for muscle levelling off around 1.6 g per kg. Recommendations for adults over 65 start at 1.0 to 1.2 g per kg and go higher for active people. A target of about 1.5 g per kg sits inside those ranges without asking someone with little appetite to eat a bodybuilder's diet. Ballast uses that number and recalculates it as your weight comes down.
Daily target by body weight
| Weight | Target (0.7 g/lb) | Floor (1.2 g/kg) |
|---|---|---|
| 140 lb | 98 g | 76 g |
| 160 lb | 112 g | 87 g |
| 180 lb | 126 g | 98 g |
| 200 lb | 140 g | 109 g |
| 220 lb | 154 g | 120 g |
| 240 lb | 168 g | 131 g |
| 260 lb | 182 g | 142 g |
| 280 lb | 196 g | 152 g |
| 300 lb | 210 g | 163 g |
| 320 lb | 224 g | 174 g |
Hitting it when you are not hungry
- Protein first. Eat the protein part of each meal before the rest, while you still have appetite.
- Spread it out. Three or four servings of 25 to 35 g are easier than two big meals, and easier on a stomach that fills quickly.
- Lean on dense foods. Greek yogurt, cottage cheese, eggs, chicken, fish, and a protein shake on the days food is unappealing.
- Count it. Most people overestimate how much protein they eat. A quick log for a couple of weeks shows where the gap is.
Protein only protects muscle that is being used. Pair it with strength training.
Sources
- Jäger R, et al.. International Society of Sports Nutrition position stand: protein and exercise. J Int Soc Sports Nutr. 2017;14:20. doi.org/10.1186/s12970-017-0177-8
- Morton RW, et al.. A systematic review, meta-analysis and meta-regression of the effect of protein supplementation on resistance training-induced gains in muscle mass and strength. Br J Sports Med. 2018;52:376-384. doi.org/10.1136/bjsports-2017-097608
- Bauer J, et al.. Evidence-based recommendations for optimal dietary protein intake in older people: a position paper from the PROT-AGE Study Group. J Am Med Dir Assoc. 2013;14(8):542-559. doi.org/10.1016/j.jamda.2013.05.021
- Mozaffarian D, et al.. Nutritional priorities to support GLP-1 therapy for obesity: a joint advisory from the American College of Lifestyle Medicine, the American Society for Nutrition, the Obesity Medicine Association, and The Obesity Society. Am J Lifestyle Med. 2025. doi.org/10.1177/15598276251344827
- Wilding JPH, et al.. Once-weekly semaglutide in adults with overweight or obesity (STEP 1). N Engl J Med. 2021;384:989-1002. doi.org/10.1056/NEJMoa2032183