Plain water has 0 grams of protein. A small glass and a large bottle both contribute zero protein to your daily total. Water supports hydration, but it does not replace protein from food or drinks with protein added.
Quick answer: Plain tap, bottled, or sparkling water normally has 0 grams of protein. A product labeled protein water is a different drink because manufacturers add protein to it. Check the Nutrition Facts label for its amount per serving.
How much protein is in different amounts of plain water?
| Amount of plain water | Protein |
|---|---|
| 8 fl oz (about 240 mL) | 0 g |
| 16 fl oz (about 475 mL) | 0 g |
| 1 liter (about 34 fl oz) | 0 g |
| 2 liters (about 68 fl oz) | 0 g |
Changing the volume does not change the result. Plain water may contain dissolved minerals, but it has no meaningful amount of protein. For individual packaged drinks, the product label is the best place to check.
Does drinking water supply oxygen to your body?
No. Water molecules contain oxygen atoms, but drinking water is not how your organs receive oxygen. You breathe oxygen into your lungs, and your blood carries it around your body. Drinking water helps with hydration.
Is protein water the same as plain water?
No. Protein water is a beverage made with water and an added protein ingredient. The amount varies by product and serving size. Some products may also contain sweeteners, flavorings, or electrolytes. Read the label if you are counting protein or other nutrients. Our protein water guide explains what to look for.
Water, milk, a protein shake, and a protein water drink can all help you take in fluids, but only some provide protein. You can get protein from eggs, dairy, beans, tofu, fish, poultry, and other foods.
What should you do if you are tracking protein?
Count plain water toward your fluid intake, not toward your protein intake. For foods and packaged drinks, use the Nutrition Facts label and the serving size you consumed. If you are unsure where to begin, use our free protein calculator to estimate a daily target for a generally healthy adult.
