Check How Much Protein to Eat While Dieting to Protect Your Muscle
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Key Takeaway
Raising protein while you lose weight means you lose less muscle. A 2024 Clinical Nutrition ESPEN meta-analysis pooled 47 randomized trials (3,218 people) of adults with overweight or obesity and reported this.
The paper and the Korea Disease Control and Prevention Agency use different units, so it helps to know how to read their numbers side by side first.
What did the recent meta-analysis show about protein?
In 28 trials that looked at muscle mass (1,989 people), the groups that raised protein lost significantly less muscle mass (standardized mean difference 0.75, 95% confidence interval 0.41 to 1.10). On the other hand, they did not significantly prevent the loss of strength and physical function.
The abstract says that above 1.3 g per kg of body weight per day, muscle mass is expected to increase, and below 1.0 g, the risk of losing muscle mass is high. The risk of bias in the trials ranged from low to high.
What does the Korea Disease Control and Prevention Agency say?
The weight-management meal guide on the agency's National Health Information Portal (2026 update) explains that you should not run short of protein even while managing your weight. The recommended amount is about 0.8 to 1.2 g per kg, based on the ideal weight for your height. It also carries a caution that overdoing it with supplements can cause health problems.
| Source | Criterion | Example |
|---|---|---|
| 2024 meta-analysis | Muscle mass expected to increase above 1.3 g per kg of body weight per day | The abstract says only that it is based on body weight |
| Korea Disease Control and Prevention Agency | About 0.8 to 1.2 g per kg of ideal weight | A woman 160 cm tall has an ideal weight of about 52 kg, which is 42 to 62 g |
The two criteria use different body weights for the calculation or cover different study populations, so they are hard to treat as the same value. Start your meal plan from the agency's guidance, and if you are worried about losing muscle, check with a doctor or dietitian.
What should you check on the protein products people often look for on Coupang?
I picked the protein supplement products that people favor most. Forms may differ, such as ready-to-drink protein beverages and powder products, so look at them to suit your taste and meal plan.
- Work out the grams of protein per serving and how many servings a day you would end up having.
- Check whether the sugars and calories fit into your meal plan.
- Check the allergen labeling and ingredients such as lactose.
- First add up the protein you already get from meals, then settle on only the shortfall.
When should you talk to a professional?
If you have kidney or liver disease, or you are pregnant, talk to your doctor before changing your protein intake. If you get stomach pain or hives after taking a supplement, stop and ask for advice. This article does not replace diagnosis or prescription.
Product information
Candidates compared
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The Danbaek Protein Drink Chocolate
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BSN Syntha-6 Protein Powder Chocolate Milkshake
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Frequently Asked Questions
The more protein I eat, the more muscle I keep?
What the paper showed is that the groups that raised protein lost less muscle mass than the groups that did not. Strength and physical function were not significantly preserved, and the conclusion is not that more is better.
Is food alone enough, without supplements?
The Korea Disease Control and Prevention Agency advises getting enough good-quality protein from a variety of foods, and explains that overdoing it with supplements can cause problems. First check how much you already eat in your meals.
Can I raise my protein if I have kidney or liver disease?
With these conditions, protein intake has to be set individually. Don't set it from the figures in this article; talk to the doctor treating you.
Sources & Verification Date
- Enhanced protein intake on maintaining muscle mass, strength, and physical function in adults with overweight/obesity: A systematic review and meta-analysis (Clinical Nutrition ESPEN, 2024, PMID 39002131) · Verified
- Meals for healthy weight management (Korea Disease Control and Prevention Agency, National Health Information Portal, updated 2026-06-05) · Verified
All materials have been verified from official announcements and may have changed since verification.