Thanks for all your advice guys

I just bought him some kids fish oil and multivitamin supplements. Apparently boosting fish oil and vitamin D can help, and yes calcium, too. Luckily he loves cheese and natural yoghurt!

I'm definitely brushing twice a day now, and giving him even more water after eating. I still feel a bit crap though Mum said my siblings and I had the same diet as DS (no soft drink/cordial/juice, no lollies, lots of fruit/veg, eggs dairy and meat) and brushed once a day and I've never had a cavity in my life. I'm not sure why his teeth are bad

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