Fermented foods available in the US can be high in sugar, and it is important to consume non-sweetened yogurts to avoid excessive sugar intake.

“A lot of fermented that are available in the US can be high in sugar. So was there any instruction as to getting people to make sure that they were consuming yogurts that weren't loaded with sugar? - Yep. - Or did you let them just select for the stuff in the cold section that is fermented? - No, super important point. We instructed people to eat non-sweetened yogurts. I think a huge pitfall in this area is you can have a yogurt loaded with bacteria, kind of the base of what's healthy, and then a ton of like artificial flavoring and sugar loaded on top of that.”