Studies have shown that people who typically eat a wider variety of fermented foods like sauerkraut and kefir generally have greater bacterial diversity, which has been correlated with lower weight. (mindbodygreen.com)
These two are also the most common types that you'll find in fermented foods like sauerkraut and yogurt. (bodywisdomnutrition.com)
When using the vanilla extract alongside with fermented foods ie making kefir vanilla ice cream. (cheeseslave.com)