Nettle Tea (Urtica dioica): Health Benefits, Preparation, and Precautions

Stinging nettle (Urtica dioica) is a nutrient-dense perennial herb. Its leaves, steeped as tea, deliver bioactive compounds with documented effects.

Key Benefits (Human & Preclinical Evidence)

• Anti-inflammatory: Inhibits NF-κB, COX-2, TNF-α; reduces joint pain in osteoarthritis (RCTs: 50% reduction in NSAID use).
• Benign prostatic hyperplasia (BPH): Root extract (not leaf tea) improves IPSS scores, flow rate—multiple RCTs. Leaf tea has weaker data.
• Glycemic control: Animal and small human studies show improved insulin sensitivity, lower fasting glucose.
• Diuretic: Increases urine output; may lower BP modestly.
• Antioxidant: High polyphenols, flavonoids, vitamin C—ORAC value comparable to green tea.
• Allergy relief: In vitro histamine receptor antagonism; anecdotal for hay fever.

Preparation

1–2 tsp dried leaf (or 2–4 fresh leaves) per 8 oz boiling water; steep 10–15 min, covered. Drink 1–3 cups/day.

Safety & Interactions

• Contraindicated: Pregnancy (uterine stimulant), severe renal/heart failure (fluid/electrolyte shifts).
• Caution with: Anticoagulants (vitamin K), diuretics, antihypertensives, diabetes meds (additive hypoglycemia), lithium (reduced clearance).
• Side effects: Mild GI upset, rash (rare). Fresh plant causes contact urticaria—wear gloves harvesting.

Nettle tea is a safe, nutritive herbal for most adults. For BPH, use standardized root extract, not leaf tea.