The longer rise time needed for sourdough increases the lactic acid and creates an ideal pH for the enzyme phytase. This enzyme breaks down phytates (read more about the dangers of phytic acid here) more effectively than in yeast breads. Sourdough rye has the least amount of phytates making it a healthier bread.
2- Predigestion of starches
The bacteria and yeast in the sourdough culture work to predigest the starches in the grains, thus making it more easily digestible to the consumer.
3- Breakdown of gluten
Here again, the longer soaking and rising times in the preparation of sourdough breaks the protein gluten into amino acids, making it more digestible.
4- Preservative
The acetic acid which is produced along with lactic acid, helps preserve the bread by inhibiting the growth of mold.
5- Better blood glucose regulation
There has been some research suggesting that sourdough bread — sourdough white bread — showed positive physiological responses. The subjects’ blood glucose levels were lower after eating sourdough white bread compared to whole wheat, whole wheat with barley and plain white bread. Interestingly, the subjects tested after eating whole wheat bread fared the worse — with spiking blood glucose levels.
Additionally, the researchers found that the positive response lasted through the next meal and for several hours after that. They concluded that what you have for breakfast will influence how the body responds to the next meal.
This is all well and good, but the most pressing reason is the TASTE! That tangy, slightly sour taste is awesome! If you eat grains, make sourdough your primary source of grains.
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