Hi dannybex,
I would take this up with WEBMD and a host of other publications concerning Brewers Yeast and possible properties.
Saccharomyces cerevisiae is listed below as used for C.Diff by WEBMD.
Brewers Yeast may also help with regulating Blood Sugar in Diabetes, which is another source of Bacterial Overgrowth that has caused ME/CFS symptoms in my own case......
From Wikipedia, Saccharomyces cerevisiae does indeed contain Virus ( including M Virus) which produces a killer toxin that has antimicrobial antiviral properties (articles below).
S. Boulardii also looks promising and I am guessing that a number of us may have developed similar Gastrointestinal illness related to ME/CFS, but due to different causation's. Bacterial Overgrowth can have a multiplicity of causation's and without any full understanding of different forms of Bacterial Overgrowth or ways to treat other than Antibiotics or FMT, it all comes down to trial and error and finding what is right for us individually.
I do not see a one size fits all and what may work for one person may indeed work negatively for another. My comments above stressed that this was what I was trialing.
As with any supplements, probiotic's etc. anyone on this site must always ask the advice of a Doctor to make sure that there will be no interaction with medications or possible side effects and do as much reading as possible.
WEBMD:
https://www.webmd.com/vitamins/ai/ingredientmono-715/brewers-yeast
BREWER'S YEAST
OTHER NAME(S):
Baker's Yeast, Dried Yeast Fermentate, Faex, Faex Medicinalis, Levadura de Cerveza...
Show More
Read Reviews (20)
Overview Information
Brewer's yeast is a kind of yeast that is a by-product of brewing beer.
Dietary supplements containing brewer's yeast often contain non-living, dried yeast. People use brewer's yeast to make medicine.
Brewer's yeast is taken by
mouth for respiratory problems, including the
common cold and other upper respiratory tract infections, influenza,
seasonal allergies, and
swine flu. Brewer's yeast is also taken by
mouth for
diarrhea, swelling of the
colon (
colitis) due to the bacteria
Clostridium difficile,
high cholesterol, loss of appetite,
acne, premenstrual syndrome (PMS), recurring boils on the
skin (furunculosis),
type 2 diabetes and
irritable bowel syndrome (
IBS). It has also been used as a source of B
vitamins,
chromium, and protein.
How does it work?
Due to the chromium content of brewer's yeast, there is interest in using it for lowering blood glucose in people with diabetes. Chromium may help the body use insulin more effectively. This can lower blood sugar levels.
Additionally, brewer's yeast seems to increase enzymes in the intestine that could help relieve diarrhea.
Brewer's yeast might help fight bacteria that cause infections in the intestine and improve the body's defenses against viral lung infections such as flu and the common cold.
Brewer's yeast is a source of B vitamins and protein.
From Wikipedia, concerning
Saccharomyces cerevisiae/M Virus:
Saccharomyces cerevisiae virus L-A
From Wikipedia, the free encyclopedia
Saccharomyces cerevisiae virus L-A Virus classification (unranked):
VirusRealm:
RiboviriaKingdom:
OrthornaviraePhylum:
DuplornaviricotaClass:
ChrymotiviricetesOrder:
GhabriviralesFamily:
TotiviridaeGenus:
TotivirusSpecies:
Saccharomyces cerevisiae virus L-A
Synonyms
- Saccharomyces cerevisiae virus LA[1]
- Saccharomyces cerevisiae virus ScV1[2]
Saccharomyces cerevisiae virus L-A, also called
L-A helper virus, is a member of the
Totiviridae family of viruses found primarily in
Saccharomyces cerevisiae.
[3] Its discovery in the 1970s was the main starting point of research on yeast virology.
[4] It is a
double-stranded RNA virus with no extracellular phase and so is inherited through
vertical cytoplasmic transmission.
[4] Additionally, in many strains of the yeast, it is found along with another virus called the M virus, known to encode the killer toxin in many
S. cerevisiae strains which confers the ability to kill neighboring sensitive cells that do not harbor the virus. It is indeed for this reason the virus is referred to as a
helper virus, due to the M
genome's dependence on it for its own survival and replication.
Brewer's yeast
Brewer's yeast is made from a one-celled fungus called Saccharomyces cerevisiae and is used to make beer. It has been grown and used as a nutritional supplement for years. Brewer's yeast is a rich source of minerals -- particularly selenium; protein; B-complex vitamins, and chromium, an essential trace mineral that helps the body maintain normal blood sugar levels.
Brewer's yeast tastes bitter and should not be confused with baker's yeast, nutritional yeast, or torula yeast. All those types of yeast are low in chromium.
General
The B-complex vitamins in brewer's yeast include B1 (thiamine), B2 (riboflavin), B3 (niacin), B5 (pantothenic acid), B6 (pyridoxine), B9 (folic acid), and H or B7 (biotin). These vitamins help break down carbohydrates, fats, and proteins, which provide the body with energy. They also support the nervous system, help maintain the muscles used for digestion, and keep skin, hair, eyes, mouth, and liver healthy.
Brewer's yeast does not contain vitamin B12, an essential vitamin found in meat and dairy products.
Diabetes
Some studies suggest that chromium supplements may help people with diabetes control blood sugar levels. People with diabetes either do not produce enough insulin -- a hormone needed to change sugar, starches and other food into energy -- or cannot use the insulin that their bodies make. Chromium may lower blood sugar levels as well, improving glucose tolerance and reducing the amount of insulin needed. Because brewer's yeast is a rich source of chromium, scientists think it may help treat high blood sugar.
High Cholesterol
A few studies suggest that brewer's yeast may help lower LDL ("bad") cholesterol levels in the blood and raise HDL ("good") cholesterol levels. Researchers aren't sure whether that is due to the chromium in brewer's yeast or another substance. Not all studies have found positive results.
https://www.mountsinai.org/health-library/supplement/brewers-yeast