Clear broths are thin, transparent liquids made by simmering meat, vegetables, or both in water, then straining out all solid ingredients. They contain no fat, cream, or visible particles. You’ll most commonly encounter the term when a doctor puts you on a clear liquid diet before a procedure like a colonoscopy, but clear broths also serve as a foundation in everyday cooking.
What Makes a Broth “Clear”
A broth qualifies as clear when you can see through it. That means no chunks of vegetables, no shreds of meat, no globules of fat floating on the surface, and no cloudiness from dairy or starches. Think of it as the opposite of a creamy soup or a thick stew. Chicken broth, beef broth, vegetable broth, bouillon, and consommé can all be clear broths, as long as they’ve been properly strained and defatted.
The distinction matters because “broth” on its own doesn’t guarantee clarity. A homemade chicken soup with noodles and carrots is broth-based, but it’s not a clear broth. To count, the liquid needs to be free of solid food and free of fat. Commercial products labeled “fat-free broth” or “clear broth” generally meet this standard, though it’s worth checking the label for added cream or thickeners.
Clear Broth vs. Stock vs. Consommé
These three terms get used interchangeably, but they’re different products. Broth is made by simmering meat, vegetables, and aromatics in water, producing a lighter, more flavorful liquid. Stock is richer and more gelatinous because it’s made by simmering bones for several hours, which extracts collagen and gives stock a thicker body. Stock can be strained into a clear liquid, but its natural gelatin means it may set into a jelly when cooled.
Consommé takes clarity to another level. It’s broth or stock that has been deliberately purified through a technique involving egg whites. You stir beaten egg whites into simmering broth, then stop stirring. The egg whites rise to the surface and form a “raft” that attracts stray particles, proteins, and impurities as the liquid bubbles beneath it. The result is a perfectly transparent, deeply flavored liquid. In culinary tradition, consommé is considered the most refined version of a clear broth.
Clear Broths on a Medical Diet
If you’ve been told to follow a clear liquid diet, usually before surgery or a colonoscopy, clear broth is one of your main sources of flavor and salt. The Mayo Clinic defines the requirement as “clear, fat-free broth such as bouillon or consommé.” The goal is to keep your digestive system as empty as possible while still giving your body fluids and electrolytes.
On a clear liquid diet, the rules are strict. You can’t have any solid food, and your liquids can’t contain milk, cream, or nondairy creamer. That rules out cream-based soups entirely. It also means bone broth, which is popular for its collagen content, may not qualify unless it’s been thoroughly strained and all fat has been skimmed off. If your bone broth is cloudy or has a thick, gelatinous texture at room temperature, it’s too heavy for a clear liquid diet.
Color matters too, particularly for colonoscopy prep. MD Anderson Cancer Center advises avoiding anything with red, orange, or purple food coloring the day before your procedure. These dyes can coat the inside of the colon and look like blood or inflammation to the medical team during the exam. Stick to golden or pale-colored broths: chicken, plain vegetable, or light beef. Skip tomato-based broths and anything with beet coloring.
What’s Actually in a Cup of Clear Broth
Nutritionally, clear broth is mostly water. A cup of Swanson 99% fat-free chicken broth contains just under 5 calories, less than 1 gram of protein, and about 490 milligrams of sodium. That sodium content is actually useful during a clear liquid diet, since your body needs electrolytes, but it’s worth noting if you’re watching your salt intake for other reasons. Low-sodium versions typically cut that number roughly in half.
Because clear broth is so low in calories and protein, it’s not a meaningful source of nutrition on its own. A clear liquid diet is only meant to last one to three days. The broth’s real value is providing warmth, flavor, and hydration during a period when your food options are extremely limited.
How to Make Broth Clear at Home
If you’re starting with homemade broth that’s cloudy, you can clarify it in a few steps. First, chill the broth in the refrigerator. Any fat will solidify on the surface and can be lifted off with a spoon. Then strain the liquid through a fine-mesh sieve lined with cheesecloth to catch smaller particles.
For a more refined result, use the egg white method. Bring your strained broth to a gentle simmer and stir in two or three lightly beaten egg whites per quart of liquid. Stop stirring once the egg whites begin to coagulate and float. They’ll form a foamy raft on the surface that traps proteins and tiny particles. After about 10 to 15 minutes of gentle simmering, carefully ladle the broth out from beneath the raft, straining it one more time through cheesecloth. The liquid underneath will be noticeably clearer.
If you’re buying store-bought broth for a medical diet, the simplest approach is to choose a product labeled “clear” or “fat-free” and pour it through a strainer before heating, just to catch any sediment that may have settled in the container.