Ballast / Guides

How much protein do you need on a GLP-1?

Updated 10/21/2026. General fitness information, not medical advice.

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

WeightTarget (0.7 g/lb)Floor (1.2 g/kg)
140 lb98 g76 g
160 lb112 g87 g
180 lb126 g98 g
200 lb140 g109 g
220 lb154 g120 g
240 lb168 g131 g
260 lb182 g142 g
280 lb196 g152 g
300 lb210 g163 g
320 lb224 g174 g

Hitting it when you are not hungry

Protein only protects muscle that is being used. Pair it with strength training.

Sources

  1. 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
  2. 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
  3. 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
  4. 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
  5. 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