Prevention, Hygiene & Lifestyle
Diet, sugar & acid
What and how often you eat and drink shapes your risk of decay and erosion.
Main risk
Sugar and acid
Key factor
How often
Best drink
Water
Watch for
Erosion, decay
Overview
Sugar feeds the bacteria that make acid and cause decay. Acidic food and drink can also wear away enamel directly, a process called erosion.
How often you snack and sip matters as much as the amount. Frequent sugary or acidic treats keep your teeth under attack for longer.
What to know
- Sugar fuels the bacteria that cause decay
- Acidic drinks can erode enamel directly
- Frequent snacking and sipping raises the risk
- Water is the best between-meal drink
Common questions
Are fruit juices and smoothies okay?
They are both sugary and acidic. Keep them to mealtimes and drink water in between.
Is it the amount of sugar that counts?
How often matters most. Constant snacking gives teeth no time to recover.
Are diet soft drinks safer?
They have less sugar but are still acidic, so they can still wear enamel.
Should I brush right after acidic food?
Wait about an hour. Brushing straight away can wear softened enamel.
Related topics
Dr Rick Iskandar · Reviewed June 2026