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GUT HEALTH

Juniper

Juniperus communis

also known as juniper berry

Moderate (traditional use)
Juniper — Köhler 1887 botanical illustration

An evergreen shrub whose blue-black berries flavor gin and have a long traditional use as a urinary tract herb. Juniper works as a mild diuretic and antiseptic — but it can irritate the kidneys with extended use, so short courses only.

  • Mild diuretic action
  • Traditional antiseptic for urinary tract support
  • Carminative — eases gas and bloating
  • Topical use for minor muscle and joint discomfort
  • Distinctive piney flavor used widely in cooking and beverages
Can irritate the kidneys — limit continuous use to 4 to 6 weeks
Avoid with kidney disease
Avoid during pregnancy — can stimulate the uterus and cause miscarriage
Avoid during nursing
Use caution with diuretic medications — additive effect
Use caution with diabetes medication — may lower blood sugar
Skip with bladder or kidney inflammation
Research

Memorial Sloan Kettering About Herbs · EMA Herbal Medicinal Product Monographs · American Botanical Council HerbMedPro · Memorial Sloan Kettering About Herbs · EMA Herbal Medicinal Product Monographs · American Botanical Council HerbMedPro

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Common questions
Mainly urinary tract support. Juniper berries act as a mild diuretic and traditional antiseptic, which is the main reason they show up in herbal urinary formulas, separate from their more familiar role flavoring gin.
No, this one specifically calls for short courses. Juniper can irritate the kidneys with extended use, so guidance limits continuous use to 4 to 6 weeks.
No, avoid it. Given juniper's known potential to irritate the kidneys, it's not appropriate if you already have kidney disease or any bladder or kidney inflammation.
No, avoid it. Juniper can stimulate the uterus and has been associated with miscarriage risk.