Woman, 80, developed toxic reaction after months of using toothpaste with baking soda
The use of DIY remedies has become common practice in oral healthcare, but some measures may have risks. Consumer use of sodium bicarbonate - or baking soda - usually stems from the product's qualities as a deodorising, degreasing and cleaning agent. According to one case study, misuse of the product could spell trouble.
In 2020, the journal BMC Nephrology presented the case of an 80-year-old woman who developed a toxic reaction after using toothpaste with baking soda.
The patient had a history of his blood pressure leading to chronic kidney disease, an elevated blood lipid profile, acid reflux and atrial fibrillation.
Upon questioning her use of baking soda, the patient's daughter reported that her mother had been brushing her teeth with baking soda at least three times a day for the past six months.
"The patient reported that her friend recommended it for her to improve her teeth hygiene," states the report.
This led doctors to believe that the patient's use of baking soda as a toothpaste caused her chronic metabolic alkalosis and hypokalaemia.
Several health bodies suggest baking soda has properties which have proven useful in removing stains from teeth.
Some research indicates it may even be effective in fighting the bacteria responsible for the formation of plaque, as well as bad breath.
The practice of tooth brushing with baking soda may lead to the ingestion of the substance, however.