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What
does Brewer’s yeast do?
Brewer’s yeast is the dried, pulverized cells of Saccharomyces cerevisiae,
a type of fungus. It is a rich source of B-complex vitamins, protein
(providing all essential amino acids), and minerals, including a
biologically active form of chromium known as glucose tolerance
factor (GTF). Brewer’s yeast should not be confused with nutritional
yeast or torula yeast, which are low in chromium. Brewer’s yeast,
possibly by changing the microbial flora in the large intestine,
might be helpful in the treatment of some cases of infectious diarrhea.
Where
is it found?
Brewer’s yeast, which has a very bitter taste, is recovered after
being used in the beer-brewing process. Brewer’s yeast can also
be grown specifically for harvest as a nutritional supplement. “De-bittered”
yeast is also available, though most yeast sold in health food stores
that does not taste bitter is not real brewer’s yeast.
Who
is likely to be deficient?
Brewer’s yeast is not an essential nutrient, but it can be used
as a source of B-complex vitamins and protein. It is by far the
best source of chromium, both in terms of quantity and bio-availability.
How
much is usually taken?
Brewer’s yeast is often taken as a powder, or as tablets or capsules.
High-quality brewer’s yeast powder or flakes contain as much as
60 mcg of chromium per tablespoon (15 grams).
Are
there any side effects or interactions?
Side effects have not been reported from the use of brewer’s yeast,
although allergies to it exist in some people. It is not related
to Candida albicans fungus, which causes yeast infection. Because
it contains a highly biologically active form of chromium, supplementation
with brewer’s yeast could potentially enhance the effects of drugs
for diabetes (e.g., insulin or other blood sugar-lowering agents)
and possibly lead to hypoglycemia. Therefore, people with diabetes
taking these medications should supplement with chromium or brewer’s
yeast only under the supervision of a doctor.
Are
there any drug interactions?
Certain medications may interact with brewer’s yeast. Consult your
physician.
Consult
with your physician before begining any supplement regimen.
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