In a world where professional teeth whitening methods can cost millions of dong and many people are wary of chemicals, a simple folk remedy is making waves online. With just **2 ingredients that are easy to find in your kitchen**, and costing less than **70,000 VND (equivalent to $3)**, many people have confirmed that **their teeth are instantly white** after just one application.

No expensive teeth whitening strips. No need to go to the dentist. All you need is **baking soda** and **lemon juice** – a seemingly simple combination that has **superior cleaning power**.

**How ​​to do it:**

1. Mix **1 teaspoon of baking soda** with **a few drops of fresh lemon juice** until it forms a paste.

2. Using a soft toothbrush or cotton swab, gently rub this mixture on your teeth for **1–2 minutes**.
3. Rinse your mouth thoroughly with clean water.

4. Only use **twice a week** to avoid wearing down your tooth enamel.

– **Baking soda** is a mild abrasive that helps remove plaque and yellow stains on the tooth surface.

– **Fresh lemon** contains natural citric acid that gently “brightens” your teeth.

Users on TikTok and Instagram have been posting “before and after” videos, and the results are truly amazing. Many have called this the **“golden tip of the year”** for those who want to have a bright white smile without going to the dentist.

Although this tip is effective immediately, experts also recommend not overusing it. Using too much baking soda and citric acid can erode tooth enamel if used daily. Use it wisely and sparingly.