The Best Protein Powder on GLP-1 Drugs Like Ozempic
The best protein powder on a GLP-1 drug like Ozempic is BulkSupplements Whey Protein Isolate. One scoop gives 25 g of protein in 110 calories, with no carbs; with strength training, protein helps you keep muscle while you lose weight. It is unflavored, so it stirs into yogurt or a shake, and NSF, an independent lab, tests it. Want flavor? Get Optimum Nutrition Isolate.
Our pick for: Protein on a GLP-1 drug
- Per 25 g protein
- $1.73Amazon price
- Calories
- 1100 g carbs, 0 g fat
- Testing list
- NSF Certified for SportAlso screens for banned drugs
Why we pick it When a GLP-1 drug cuts your appetite, every bite has to count. This is close to pure protein: 25 g with almost nothing else, so a small serving does the job. NSF Certified for Sport tests it for what the label says and for banned drugs. It is also our pick for the lowest-calorie protein.
What you give up It has no flavor, so you stir it into yogurt, oatmeal or a smoothie. If a full scoop is too much, start with half a scoop in milk or water; on harder days, a ready-to-drink shake is easier.
The best protein powder for your needs
BulkSupplements suits most people on a GLP-1 drug. These two are flavored.
A flavored scoop: Optimum Nutrition Gold Standard Isolate
Optimum Nutrition Gold Standard 100% Isolate gives 25 g of protein in 100 calories, tied for the fewest here, and tastes of vanilla. It is on Informed Choice, which tests for banned substances.
Optimum Nutrition Gold Standard Isolate
$2.05 per 25 g of protein, Amazon price
If you want Isopure: Isopure Low Carb
Get the Low Carb tub: 25 g of protein in 110 calories with 1 g of carbs, and it is on Informed Choice. The Zero Carb tub has 10 fewer calories but is not on a testing list we check.
Isopure Low Carb
$2.07 per 25 g of protein, Amazon price
How much protein to aim for
A 2025 advisory from four obesity and nutrition groups says targets of 1.2 to 1.6 g of protein per kg of body weight a day have been proposed during weight loss (Mozaffarian 2025). Ask your prescriber or a dietitian for your own number.
| Your weight | Protein a day |
|---|---|
| 130 lb | 71 to 94 g |
| 160 lb | 87 to 116 g |
| 200 lb | 109 to 145 g |
| 250 lb | 136 to 181 g |
5 protein powders compared
Cheapest per 25 g of protein first, at Amazon prices checked November 6, 2026. Amazon prices change, so the order can too.
| Powder | 25 g protein | Why it is or is not the pick |
|---|---|---|
| BulkSupplements Whey Isolate25 g protein, 110 calories a scoop · NSF Certified for Sport | $1.73 | Our pick: no carbs, NSF-tested |
| Naked Whey25 g protein, 120 calories a scoop · Informed Choice | $1.84 | Concentrate: a few more calories |
| Isopure Zero Carb25 g protein, 100 calories a scoop · No testing list | $2.04 | Tied for fewest calories; 0 g carbs |
| Optimum Nutrition Gold Standard Isolate25 g protein, 100 calories a scoop · Informed Choice | $2.05 | Tied for fewest calories; flavored |
| Isopure Low Carb25 g protein, 110 calories a scoop · Informed Choice | $2.07 | Flavored; added vitamins |
Questions people ask
Why does protein matter on Ozempic?
In one trial's body scans, about 38% of the weight lost was lean mass, a 2025 advisory from four obesity and nutrition groups notes. It says to eat enough protein and to do strength training during GLP-1 treatment (Mozaffarian 2025).
Is a protein shake or a powder better?
Either works. A powder costs less per gram of protein and lets you choose how much to mix. On days you can't face a scoop, a small ready-to-drink shake is easier: see the best protein shakes.
What else should I take on a GLP-1 drug?
Protein comes first, then fiber, fluids and sometimes a multivitamin. See supplements to take on GLP-1.
Do I need a plant protein?
Only if you avoid dairy. See the best plant-based protein powder.
How we picked
We looked at the protein powders ChatGPT names for people on GLP-1 drugs and the ones our protein guides already pick, read each label for protein and calories, and checked each against NSF Certified for Sport, Informed Sport, Informed Choice and NSF/ANSI 173. We chose the powder on a testing list with no carbs and the lowest cost per 25 g of protein, within 10 calories of the fewest. Our pick for most people is Naked Whey; on a GLP-1 drug, the isolate's lower calories and carbs win. ChatGPT also names Dymatize ISO100 (see Optimum Nutrition vs Dymatize ISO100) and Orgain, a plant protein (see the best plant-based protein). Or see the protein guide.
Sources
- 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. Obes Pillars. 2025.
- NIH Dietary Supplement Label Database, Isopure Zero Carb Creamy Vanilla, label 173797. Other labels: the product labels on Amazon, read for our low-calorie protein comparison.
- Testing lists: NSF Certified for Sport and NSF/ANSI 173 (nsf.org), Informed Choice and Informed Sport; our copies are dated on third-party tested protein.