Eden Apothecary · Herb Profile
Vaccinium macrocarpon
Pronounced Cranberry = KRAN-ber-ee. Vaccinium macrocarpon = vak-SIN-ee-um mak-roh-KAR-pon.
Cool, dry, and sour-astringent: a cooling anti-adhesion astringent that flushes and tightens a hot, damp, boggy, infection-prone urinary terrain and guards the bladder against recurrent infection.
No pre-1900 source found for this exact plant. The one old reading describes the European small cranberry, not the American one this entry is about.
Likely safe in the amounts commonly found in food and juice; concentrated supplements are less well studied. NCCIH states that some studies of cranberry in pregnancy suggest it is safe in amounts commonly found in food, though the evidence is not conclusive for larger, concentrated amounts. A survey of about 400 pregnant women who regularly consumed cranberry found no associated adverse events. AHPA classifies the fruit as Class 1 (not verified against AHPA) (safe when used appropriately). Food and juice amounts are considered acceptable; high-dose supplements should be used only with clinician advice, and any UTI in pregnancy needs medical treatment. Sources: NCCIH (Cranberry: Usefulness and Safety); Wing et al., survey of cranberry use in pregnancy; AHPA Botanical Safety Handbook, 2nd ed.
Considered low risk. Cranberry is consumed as a common food with low toxicity, and moderate consumption during lactation is regarded as of little or no risk, although formal data on concentrated extracts are limited. NCCIH notes the safety of larger, concentrated amounts in lactation is not established, so food and juice amounts are preferred. Sources: NCCIH (Cranberry); e-lactation / LactMed-style assessment (cranberry, low risk).
Generally regarded as safe as a food and juice, and cranberry products have been studied for preventing recurrent UTI in children with broadly good tolerability. Prefer unsweetened juice or standardized products to limit sugar, and note that large amounts of juice can cause loose stool. A child with an active UTI, or with fever, flank pain, or vomiting, needs prompt medical assessment, not cranberry alone. Sources: NCCIH (Cranberry); pediatric cranberry UTI-prevention trials (e.g., randomized studies of cranberry juice in children).
Cranberry is a preventive, not a treatment for an established infection: its anti-adhesion action does not kill bacteria already colonizing the tract, so it should not replace antibiotics in an active, febrile, or ascending UTI. The fruit is high in oxalate, and heavy or concentrated intake can raise urinary oxalate, so people with a history of calcium-oxalate kidney stones should use it cautiously. It contains salicylates, so those with true salicylate or aspirin sensitivity should avoid large medicinal amounts. Sweetened cranberry juice cocktail carries a high sugar load, relevant in diabetes and for dental health, so unsweetened juice or standardized capsules are preferred. Large amounts of juice can cause loose stool, mild GI upset, and, rarely, the tart acidity can irritate reflux.
Concurrent warfarin or other coumarin anticoagulants (potential potentiation of anticoagulant effect and bleeding, see drug interactions). History of calcium-oxalate urolithiasis, where concentrated products may increase stone risk. True salicylate or aspirin allergy. An active, febrile, or complicated UTI, pyelonephritis, or UTI in pregnancy, in men, in children, or in the immunocompromised, all of which require medical evaluation and antibiotics rather than cranberry alone. Diabetes if using sweetened juice cocktail.
Not at risk. Vaccinium macrocarpon is not on the United Plant Savers At-Risk or To-Watch lists. It is one of the most heavily cultivated of all medicinal fruits, grown commercially on managed bogs in Wisconsin, Massachusetts, New Jersey, Oregon, Quebec, and British Columbia, so demand is met by farming rather than wild harvest and there is no depletion pressure on wild stands. The sustainability concerns are agricultural rather than conservational: water use, peat-bog conversion, and pesticide load, so certified-organic and low-input sources are preferable. The wild small cranberry, Vaccinium oxycoccos, can be sustainably wildcrafted where locally abundant.
Not named in the canonical biblical texts. Vaccinium macrocarpon is native to the acidic bogs and wetlands of northeastern North America and has no place in the ancient Mediterranean or Near Eastern materia medica. Its traditional use is anchored in Native American practice (Algonquian peoples such as the Wampanoag and Lenape used the berry as food, dye, and a wound medicine, and called it sassamanash), and it entered colonial and later Western use as a food, a scurvy preventive on sea voyages, and, in the modern era, a urinary remedy. It is a plant of the North American, not the biblical, tradition.
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