Oranges are a nutrient-rich fruit, especially high in vitamin C and vitamin B9 (folic acid). Thanks to this, orange juice becomes a great “assistant” for the immune system, helps slow down aging, and supports the prevention of cardiovascular diseases and high blood fat. However, drinking orange juice is not always beneficial. Below are 3 times you should avoid drinking orange juice to protect your health.

1. Do not drink orange juice before bedtime

Many people believe that drinking a glass of orange juice before bed helps them relax and replenish nutrients. In reality, this is not a good time because:

• Causes nighttime urination: The potassium in orange juice has a diuretic effect, making you wake up multiple times, which disrupts your sleep.

• May cause insomnia: Orange juice provides energy, while at night the body needs rest, which can disturb the biological rhythm.

• Erodes tooth enamel: The acid in orange juice can remain on your teeth overnight, damaging the enamel if you don’t clean your mouth after drinking.

• Increases risk of kidney stones: Some studies suggest that drinking orange juice at night may not be suitable for people at risk of kidney stones or those undergoing treatment.

2. Avoid drinking orange juice right after meals

After a meal—especially a meal rich in protein or seafood—it is not recommended to drink orange juice immediately because:

• May cause bloating and indigestion: The acid in orange juice reacts with food, slowing down digestion.

• Forms precipitates with protein: Vitamin C can combine with protein from seafood, creating compounds that are hard to digest and cause stomach discomfort.

Best timing: Drink orange juice 1–2 hours after a meal so that the body can absorb vitamins effectively while avoiding digestive issues.

3. Do not drink orange juice on an empty stomach

Oranges are highly acidic. Drinking orange juice on an empty stomach can suddenly increase stomach acid levels, leading to:

• Stomach pain, heartburn

• Irritation of gastric or duodenal ulcers

• A burning or uncomfortable feeling

Advice: Have a light snack before drinking orange juice to protect your stomach and digestive system.

The right way to drink orange juice for good health

• Drink in the morning: Helps boost energy and immunity.

• Only drink 1–2 hours after meals: Maximizes vitamin absorption.

• Moderate amount: Adults ~200ml per serving; children ~100ml per day.

• Drink immediately after squeezing: To prevent loss of vitamin C due to oxidation.

• Do not drink with milk: To avoid protein precipitation, which can cause indigestion.

Notes when choosing and consuming oranges

• Choose fresh, juicy oranges with thin skins and heavy weight.

• Avoid buying oranges stored for too long or those showing signs of chemical treatment.

• Limit adding sugar to prevent excessive calorie intake.

• Do not drink orange juice together with medications (especially antibiotics or blood pressure drugs).

• People with stomach problems or pancreatitis should limit intake to prevent worsening conditions.