What is the relationship between calcium and teeth?
If you haven’t met me already, I’m Kathryn- one of the Dental Hygienists here at Smile in Style Sunbury. I’m dual-qualified with a Bachelor of Nutrition Science and a Bachelor of Oral Health Science, and I work alongside our dentists on Wednesdays, Thursdays and Fridays at the Sunbury practice.
I’ve been part of the team since 2024, providing dental cleans and preventative care while helping patients build good oral care habits and understand how small nutrition changes can strengthen enamel, improve saliva quality and support long-term oral health.
My goal is to provide patients with practical and realistic strategies they can use between visits to maintain strong, healthy teeth. I hope you find this information helpful and easy to apply.
Your Body “Borrows” Minerals from Your Teeth
Did you know that if your diet doesn’t supply enough calcium, your body will borrow it from your teeth and bones to use for more essential functions? Calcium is needed for things like nerve signalling, blood pH regulation and muscle contraction- which means your teeth are not your body’s priority.
Most people know calcium is important for bones, but it also plays a major protective role in your mouth. Your saliva acts like a natural shield for enamel, using calcium and phosphate to neutralise acids and replace lost minerals after eating or drinking.
Every time you eat, especially carbohydrates or sugary foods, the bacteria in plaque feed on these sugars, creating an acidic environment in the mouth, which temporarily softens the enamel. Saliva works to neutralise this acid and restore those lost or borrowed minerals- but only if there is enough calcium available.
Think of your mouth like a mineral bank account- acids are withdrawals, and calcium-rich foods are deposits. The goal is to stay in credit, so your teeth are protected long before any problems arise.
Why low calcium affects enamel
When there is not enough calcium in the diet:
- Saliva becomes less effective at neutralising acid
- The enamel remains softened for longer
- Tiny mineral losses accumulate over time
This can lead to sensitivity, a higher risk of erosion, and early decay- even in people with good brushing habits.
Who is most affected?
- Frequent snackers or “sippers” across the day (other than plain water)
- Soft drink, energy drink or sparkling water lovers
- Endurance exercisers using sports drinks
- Plant-based eaters without calcium-fortified foods
- People with reflux or dry mouth
Easy nutrition habits that help you stay in “mineral credit”
- Include calcium-rich foods daily- dairy, fortified plant milks, almonds, leafy greens, tahini, tofu set with calcium, sardines.
- Pair with vitamin D for absorption (salmon, egg yolk, butter, sardines in oil, liver).
- Pair with vitamin K2 to help activate and direct calcium into bones and teeth (fermented foods, eggs, butter, Gouda/ Brie cheese).
- Limit frequent acidic exposures (soft drinks, sports drinks, vinegar/lemon shots, constant grazing).
- Rinse with water or finish meals with plain yoghurt or cheese to boost remineralisation.
- Use topical mineral products like GC Tooth Mousse (a calcium phosphate “vitamin cream” for your teeth).
- Use topical mineral products like Dr. Hisham’s Vital Teeth Serum (or Baby Teeth Serum), which uses a blend of nano-hydroxyapatite (the same mineral our teeth are composed of), calcium, vitamin K2 and D3, plus ozonated water and zinc citrate to support a healthy biome. It also contains natural acid-neutralisers such as sodium bicarbonate and potassium citrate, along with healthy oils that coat and protect the teeth.
- Hydrate well to support saliva flow
Quick takeaway
Your mouth is a mineral bank account – when calcium levels are low, the body makes withdrawals from the teeth first. Keeping enough calcium “on standby” through food protects both your enamel and your long-term oral health.
If you’d like to make an appointment for a nutrition consultation or a hygiene appointment with me, call 03 8001 6021 or book online at our Sunbury Rooms.
