Spry Xylitol Chewing Gum is "dentist recommended" (to reduce tooth decay) according to the label. It also recommends to use it "five times a day for better oral health".

IMPROVES TOOTH DENTAL CARE: Clinical studies have shown that the use of xylitol on a daily basis, may reduce the risk of tooth decay. Our spry gum is part of an essential dental defense system that may also help fight off cavities. Xylitol is a natural ingredient that inhibits bacteria's ability to stick to your teeth. When bacteria can't stick, they can't colonize. Ask your dentist and hygienist about the amazing benefits of xylitol.


side view of the label showing claims ingredients shows malic acid is present

While there's ample evidence proving the oral benefits of xylitol, I looked at the ingredients of this particular product and I see it contains Malic Acid.

According to Science Direct, Malic Acid has a pH of 3.40 and 5.11. At a pH of 5.5 or less the enamel begins to erode.

How do we (they) know the benefits of xylitol are not outweighed by the relatively low pH level induced by Malic Acid that is present in each piece of gum?

To be clear, I'm not questioning the benefits of xylitol per se. I'm questioning the purported benefit of this specific product/mixture.

  • I am uncomfortable that your personal speculation about Malic Acid isn't notable. It shouldn't need to be directly addressed in an answer. You haven't shown that this gum contains Malic acid; it isn't explicitly listed on the ingredients (although calcium carbonate is). You haven't shown the pH of the mouth, while chewing gum approaches a low pH.
    – Oddthinking
    Jan 10 '21 at 17:35
  • @Oddthinking Malic Acid is listed in the ingredients. Just take a look at the link on Amazon and you will see it is listed. I updated the question with screenshot showing Malic Acid in present in the ingredients list.
    – S.O.S
    Jan 10 '21 at 17:46

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