Fennel
Juice

One pound of fennel (approximately 454g) yields roughly 295–365ml in a cold press juicer — about 10–12 oz, close to a full glass. A centrifugal juicer extracts less: typically 250–295ml from the same pound.

Those numbers assume you're juicing the whole plant — bulb, stalks, and fronds. If you trim to bulb only (which is more common), your usable produce weight drops but your yield percentage per gram climbs, since the bulb is denser in juice than the feathery fronds.

A medium fennel bulb (without stalks and fronds) weighs about 200–275g. One bulb typically yields 130–200ml in a cold press juicer — roughly 5–7 oz on its own. You'll need 1.5 to 2 medium bulbs for a full 8 oz cup.

Fennel juice is assertive — that anise flavor is strong enough that most people blend it with apple, cucumber, or celery rather than drinking straight. A common ratio is one fennel bulb per 16 oz batch of blended juice. For your specific quantity, the calculator handles any combination.

A typical grocery store bunch of fennel contains 2–3 bulbs, usually totaling 600–900g whole weight. Trimming off the stalks and fronds leaves roughly 400–650g of bulb. That yields approximately 290–520ml of juice in a cold press juicer — between 10 and 18 oz, depending on bulb size and how much you trim.

If you're juicing the whole plant including stalks, add another 15–20% of weight and expect slightly lower overall yield since the stalks are more fibrous.

Three factors matter most: which part of the plant you're juicing, freshness, and how you prep it. The bulb yields significantly more juice than the stalks; the feathery fronds contribute almost nothing by weight but reduce the net efficiency of a batch.

Freshness matters more for fennel than for denser vegetables. A wilted fennel bulb that has lost moisture can yield 15–20% less juice than a firm, fresh one. If your fennel has been in the fridge several days and the fronds are yellowing, expect lower yields. Trim aggressively, chill the bulb briefly (not excessively cold), and cut into smaller pieces before feeding through the juicer.

Somewhat. The bigger difference is yield — a cold press extracts more juice per 100g, meaning more total nutrients per batch. Vitamin C is slightly higher in cold press juice because centrifugal juicers introduce oxygen during spinning, which degrades heat-sensitive vitamins.

The more meaningful nutritional question with fennel is what happens to anethole — the compound responsible for the licorice flavor and most of fennel's digestive benefits. Anethole is fat-soluble and doesn't concentrate much in water-based juice; most of it stays in the pulp. The polyphenols and water-soluble minerals (potassium, calcium) do transfer efficiently into juice regardless of juicer type.

No — fennel is one of the lower-sugar juicing vegetables. At roughly 5.3g of natural sugar per 100ml, a full 8 oz cup contains about 12–13g of sugar, less than carrot juice and far less than apple or beet juice. The glycemic index of fennel is low (around 15), and the residual fiber in the juice slows absorption further.

If you're managing blood sugar or following a lower-carb protocol, fennel is a practical juice ingredient. It adds flavor complexity without the sugar load of most fruit additions.

The bulb yields the most juice and has the mildest, most palatable flavor. The stalks are more fibrous and yield less, but they're edible and can be juiced — they just reduce your overall efficiency. The feathery fronds add almost no juice volume but do contribute some flavor and are safe to include.

The practical approach: juice the whole plant if you want nothing to go to waste, but expect yield numbers at the lower end of the ranges on this page. For maximum efficiency, use the bulb plus lower stalks and save the fronds for garnish or cooking.

In the quantities most people use for juicing — one bulb per day or a few ounces in a blend — fennel juice is considered safe for most adults. The anethole and estragole compounds in fennel do have mild estrogenic activity, which is generally not a concern at culinary doses.

Concerns arise at high and prolonged intake. Case reports of anethole toxicity involve consumption of over 2 liters per day of fennel-containing herbal teas. For fresh fennel juice, that would require an impractical volume of produce. The practical caution: if you're pregnant, breastfeeding, estrogen-dominant, or have PCOS, check with a practitioner before making fennel juice a daily staple. For everyone else, 4–8 oz daily in a mixed juice blend is reasonable.

Fennel juice has a distinct licorice or anise flavor — bright, clean, and slightly sweet, more mild than you might expect if you're used to fennel seeds. The flavor softens significantly when combined with other produce.

Classic pairings: apple (mellows and sweetens the anise note), cucumber (dilutes and refreshes), celery (savory counterpoint), ginger (adds heat against the cool anise), and lemon or grapefruit (citrus cuts through and brightens). A simple fennel-apple-lemon juice is one of the most approachable entry points. Fennel also works well in green blends with spinach or kale, where its flavor is less dominant.

Fresh fennel juice lasts 24–48 hours in the fridge in a sealed glass container. After that, oxidation degrades the flavor and vitamin C content noticeably, even if it's still technically safe to drink.

Cold press juice lasts slightly longer than centrifugal juice due to lower oxidation during extraction. If you're batch juicing for convenience, 2 days is the practical limit. Fill containers to the top to minimize headspace, which slows oxidation. For longer storage, freeze in ice cube trays — fennel juice freezes well and can be added to smoothies or juice blends from frozen.