Baking Soda for Indigestion & Nettle Stings: Evidence-Based Home Remedies

Sodium bicarbonate (baking soda) has two evidence-supported household uses:

1. Indigestion (Dyspepsia)

• Mechanism: Neutralizes gastric acid (NaHCO₃ + HCl → NaCl + H₂O + CO₂).
• Dose: ½ tsp (2.5 g) in 120–240 mL water, after meals.
• Limitations: Temporary relief only. High sodium (616 mg/½ tsp)—avoid in hypertension, HF, CKD, pregnancy. Chronic use → metabolic alkalosis, gastric distension, acid rebound.
• Better Alternatives: Antacids (calcium carbonate), H2 blockers, PPIs per clinician guidance.

2. Nettle Sting (Urtica dioica)

• Mechanism: Baking soda paste (3:1 soda:water) may neutralize formic acid, histamine, acetylcholine injected by trichomes. Alkaline pH denatures proteins.
• Application: Apply paste 15–20 min, rinse. Repeat prn.
• Evidence: Anecdotal; no RCTs. Dock leaf (Rumex) sap is traditional alternative.

Safety Warnings

• Not for severe allergic reaction (anaphylaxis)—use epinephrine, call 911.
• Don't apply to open wounds/broken skin.
• Don't ingest for stings.
• Not a substitute for medical evaluation if symptoms worsen or persist.