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The folowing is a quote from Food Enzymes The

Missing Link to Radiant Health by Humbart

Santillo<br><br> " An interesting research paper was published by the

Biochemical Department of E. Merch by Hinnrich, Huffmann and

Lang entitled, " Suitability of the Plant Protease

Bromelin for Substitution Therapy in Interestinal

Disorders. " The digestive capabilities of bromelin, and

enzyme extracted from pineapples, and the body's own

enzymes, pepsin and trypsin were compared,. Dr. W.H.

Taylor of the University of Oxford, investigated the

digestive pH of the stomach. He found there to be two pH

zones. At the beginning of protein digestion in the

enzyme-stomach (the upper part of the stomach), the pH ranges

from 3.4 to 4.0. As digesstion continues, the pH

becomes more acidic ranging from approximately 1.6 to

2.4.<br><br>In this research paper, Dr. Taylor stated that the

body's enzyme pepsin functions best in a pH between 1.5

and 2.5. This means that at the beginning of

digestion in the stomach, when the pH is 3 to 4, pepsin is

not at its optimum digestive capability. In other

words, when the food is in the predigestion-stomach,

pepsin has little activity. As the stomach becomes more

acidic, in approximately 1/2 to 1 hour after food is

eaten pepsin's activity increases. On the other hand,

bromelin was found to be active in a pH range of 3 to 8.

It was not only found active in the stomach's higher

pH ranges (from 3 to 4), but was also found in the

small intestine still actively digesting protein in an

alkalinge environment (approximately 7 to 8). This again,

exemplefies the truth that some enzymes do survive the acid

secretions of the stomach.<br><br>Dr. Selle, a physiologist

from the University of Texas, fed dogs cereal starch

with the addition of the starch digestive enzyme

amylase, extracted from barley, The pancreases of the dogs

were ligated (tied off) so that no pancreatic

digestive juices would affect digestion, The stomachs were

then emptied after a certain period of time and in

some cases, the cereal starch was 65% digested. The

barley amylase was proven to digest the starch in the

stomach in pH's as acidic as 2.5. When ptylin (the starch

digestive enzyme in human saliva) was compared to this

amylase, it was found to be inactivated in the stomach at

a 4.5 pH. The ptylin could not function in an

acidic pH as well as the plant amylase did. To prove

plant amylase was so effective : one-half hour after it

was orally taken,69-71% of it was found in the small

intestine still actively digesting starch. When the fecal

matter was studied for its enzyme content, to see if the

plant amylse could be found, there was a larger amount

of plant amylase than the body's own pancreatic

enzymes. Ibid., 12: 59-83 (1936). "