Whey Protein Nutrition Facts

Complete whey protein nutrition breakdown with 352 kcal per 100g, glycemic index, and diet compatibility.

Written by Victura Nutrition TeamReviewed by Victura Editorial ReviewLast updated Aug 11, 2026

352

Calories

78.1g

Protein

6.3g

Carbs

Generally yes

Is it healthy?

per 100g · per panel values

Track this food in Victura

Quick answer

A 100g serving of whey protein provides about 352 kcal. Per 100g you get about 6.25g carbs and 78.13g protein.

Whey Protein is a whole food with approximately 352 calories per 100g, tracked in Victura for macro-aware meal logging.

Calories (100g serving)
352 kcal
Carbs (100g)
6.25g
Protein (100g)
78.13g
Serving reference
100g · 100g serving
Whey Protein food photo
Whey Protein — real food photo
Whey Protein portion size visual
Portion size
Whey Protein calories and macros infographic
Calories & macros

Serving calculator

How much did you eat or drinkWhey Protein?

352

Calories

78.1g

Protein

6.3g

Carbs

1.6g

Fat

Nutrition facts

per 100g · Source: USDA FoodData Central (seeded Phase 0)

352 kcal

Calories

Protein78.1g
Carbohydrates6.3g
Fat1.6g
Fiber0.0g
Sugar0.0g

Minerals

  • Calcium: 469mg

Scientific explanation

Research-backed

Whey Protein provides approximately 352 kcal per 100g, delivering an exceptionally dense source of high-quality protein. Specifically, 100g contains 78.1g of protein, 6.2g of carbohydrates, and 1.6g of fat. These values are sourced from USDA FoodData Central and reviewed for rigorous editorial accuracy. Whey protein is a complete protein, meaning it contains all nine essential amino acids necessary for human dietary needs, with a particularly high concentration of branched-chain amino acids (BCAAs) like leucine, isoleucine, and valine. Leucine is scientifically recognized as the primary catalyst for muscle protein synthesis via the activation of the mTOR pathway, making whey protein an invaluable tool for athletes, aging populations seeking to prevent sarcopenia, and individuals recovering from injury.

Community insights

Community insight

Among Victura meal logs, whey protein appears frequently as a portable snack, post-workout recovery drink, and versatile smoothie ingredient. Users pairing it with yogurt, oatmeal, or nuts report steadier energy levels and prolonged satiety compared to consuming it alone on an empty stomach. Many community members note that incorporating a scoop of whey protein into morning oatmeal ('proats') helps prevent the mid-morning energy crash often associated with high-carbohydrate breakfasts. Additionally, home bakers frequently use it to replace a portion of flour in recipes for pancakes, muffins, and energy bites, successfully boosting the protein density of their favorite snacks. Some users with mild lactose sensitivity report that while whey protein concentrate is generally well-tolerated, switching to a highly filtered isolate or pairing their shake with a source of soluble fiber helps optimize digestion and eliminate mild bloating.

Pros

  • Whey Protein is a whole food with measurable macro nutrients
  • Exceptionally high protein-to-calorie ratio
  • Rich in essential amino acids and BCAAs like leucine
  • Highly bioavailable calcium content

Cons

  • Portion size still matters for calorie goals
  • Contains dairy/lactose, which may affect sensitive individuals

Best time to eat

Ideal post-workout or paired with fiber and healthy fats for balanced meals.

Good windows

  • Post-workout recovery
  • With breakfast to boost protein density
  • Between meals as a satiating snack

Consider avoiding

  • Very large portions without physical activity

Diet compatibility

Weight loss

Friendly

Highly satiating and low in fat/carbs per serving, though energy-dense per 100g.

Keto

Friendly

Net carbs ~6.2g per 100g - compatible with strict keto.

Diabetic friendly

Friendly

GI N/A with 0.0g sugar - generally blood-sugar friendly in moderation.

Frequently asked questions

Yes — a whey protein is a whole food with measurable nutrients. Healthiness depends on overall diet, portions, and your goals.

People also ask

  • Is a whey protein healthy?

    Yes — a whey protein is a whole food with measurable nutrients. Healthiness depends on overall diet, portions, and your goals.

  • Can I eat a whey protein every day?

    Most people can include a whey protein daily as part of a balanced diet, as long as total calories and carbs fit their plan.

  • Are Whey Proteins good for weight loss?

    Highly satiating and low in fat/carbs per serving, though energy-dense per 100g.

  • How many calories are in a whey protein?

    A typical medium serving of whey protein has about 352 calories, while 100g contains about 352 calories (USDA reference).

  • Are Whey Proteins good before a workout?

    Whey proteins can work before activity when you want easy carbs; pair a whey protein with protein if your session is long.

  • Are Whey Proteins high in sugar?

    Whey proteins contain about 0.0g sugar per 100g — mostly natural sugars when whole.

  • Is whey protein keto-friendly?

    Yes, whey protein is highly keto-friendly. With only 6.2g of net carbohydrates per 100g (and less than 2g of carbs per standard 30g serving), it easily fits within the strict carbohydrate limits of a ketogenic diet. It helps keto practitioners maintain muscle mass while staying in a state of deep ketosis.

  • What is the glycemic index of whey protein?

    The glycemic index (GI) of pure whey protein is extremely low, estimated to be close to zero because it contains virtually no carbohydrates or sugars. While it does stimulate an insulin response to help transport amino acids into muscle tissue, it does not raise blood glucose levels, making it highly stable for blood sugar management.

  • Is whey protein safe for people with diabetes?

    Yes, whey protein is safe and highly beneficial for people with diabetes. Because it has a negligible glycemic index and contains 0.0g of sugar, it does not cause blood sugar spikes. Research suggests that consuming whey protein before a meal can actually improve post-meal insulin secretion and help stabilize blood glucose levels.

How we review this guide

Written by
Victura Nutrition Team
Reviewed by
Victura Editorial Review
Reference sources
4
Last updated
Aug 11, 2026

Revision & correction policy

References

  1. USDA FoodData Central(usda)
  2. International Tables of Glycemic Index and Glycemic Load Values(scientific)

Ready to track your meals with AI?

Victura scans your plate, logs macros automatically, and coaches you toward your goals — halal, keto, diabetic-friendly, and more.