Why only with wild-yeast?

Many people are complaining of getting indigestion
or feeling bloated after eating bread.
It may be caused by some additives for long preservation of bread.
Men are a part of nature.
Food that we are eating can not be distorted with
Unknown artificial stuff only to make our metabolism unnatural,
Eventually resulting in a variety of disease.
As you can see from how to get the seed culture,
Initially I am using pine apple juice (made by crushing it)
and dark rye flour as my teacher instructed in his book.
I can tell you how much sugar or butter is added to make dough.
The answer is nothing.