3. Citrus fruits and juices
Citrus fruit is another acidic food that you need to avoid if you don’t want to develop heartburn. Orange and grapefruit juices may irritate your stomach and cause discomfort.
- pH of lemons — 2.2 — 2.4
- pH of grapefruit — 3.0 — 3.7
- pH of orange — 3.0 — 4.0