What Exactly Is Protein Water And How Nutritious Is It? - Tasting Table
Briefly

Protein water mixes protein powders such as whey, collagen, or plant protein into plain water to create a lighter, thinner alternative to shakes. Most bottles provide roughly 15–20 grams of protein per serving while remaining low in calories and often low in added sugars. Some formulas include electrolytes to aid rehydration. The drinks offer convenient, portable protein and hydration useful for post-workout or meeting daily protein targets. The beverages generally lack fiber, vitamins, and minerals, so they do not provide comprehensive nutrition and should not replace whole-food protein sources or balanced meals.
Think of it as a stripped-down version of a protein shake. Instead of being blended with milk or a dairy substitute, it mixes protein powders (like whey, collagen, or plant protein) into plain water. The result is a lighter, thinner drink that is often low calorie and with few or no added sugars. You'll mostly find it sold in single bottles at the store alongside popular sports drinks, but a few brands also make mix-in packets for your own water bottle.
But here's the catch: while this drink may serve those narrow purposes, it falls short as an all-around nutrition source. Most protein water bottles deliver between 15 and 20 grams of protein per serving - but little else. Some brands add electrolytes to support rehydration, but generally, the drinks include no fiber, vitamins, or minerals, making them lean beverages that deliver on protein but offering minimal nutritional breadth.
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