Let's be fair, sourdough can be healthier than some other bread choices — but that doesn’t give it ‘health food’ status - it's still bread after all. That being said, it's a great alternative for many store-bought options. Let's look at my top 3 favorite reasons why:

1. Prebiotics for gut health
Living in our intestines are trillions of microbes that help keep your belly (and the rest of you) healthy. Their well-being is essential to your gut health, which is important for digestion, immunity, mental health and more.

One way to keep your gut microbiome healthy? Eating fermented foods. Like sourdough bread.

“Sourdough bread ferments over time. That’s what causes those bubbles to form and creates holes in the bread when you cut into it,” Beth Czerwony, RD, LD explains. “Fermentation creates prebiotics, which are what feed the healthy bacteria in your gut.” Of course there are many other gut-heathy foods out there, so eat your fruits & veggies.

2. Effect on blood sugar
If you’re watching your sugar intake, people will tell you that bread is something to steer clear of. But thanks to the fermentation process, sourdough has a lower glycemic index than some other breads.

For comparison, a typical slice of white bread has a glycemic index of 100. Foods with a number higher than 70 are considered to be high glycemic index foods. Sourdough bread has a glycemic index of around 55. Typically, low glycemic index foods are those with a number of 50 or less.

3. Less gluten/phytic acid
People who are sensitive to gluten may be able to better digest sourdough bread. That’s because the fermentation process helps decrease the amount of gluten and phytic acid in grains making its nutrients more readily available.

But sourdough isn’t gluten-free. So, people with celiac disease who have to avoid all gluten are likely to be advised against it. For those whom large amounts of gluten cause digestive woes, sourdough bread may be an alternative to going full-on gluten-free.

All benefits noted above were copied from https://health.clevelandclinic.org/benefits-of-sourdough-bread.
I understand them to be realistic, but Leaven Heaven LLC cannot guarantee these health benefits on any individual or group of individuals health in any way.