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Dangerous probiotic strain in yogurt since 1981
Quote from
Livy on September 27, 2026, 6:32 am
Another eye-opening article from Megan Stevens:
Why Most Yogurt Turns into Accutane in Your Body (and how to choose yogurt at the store or make your own)
Some bacteria (probiotics) can chemically change nutrients (in this case a precursor to vitamin A, retinol) into different forms inside the body.
In this case, Streptococcus thermophilus, added to almost all commercial yogurts, was shown to strongly change natural vitamin A into a different form called 13-cis retinol.
That matters because 13-cis retinol is turned by the body into 13-cis retinoic acid, a very powerful vitamin A compound also known as isotretinoin (also known as Accutane).
The most surprising discovery from my research is that, since 1981, U.S. law has required all products labeled as yogurt to contain both Streptococcus thermophilus and Lactobacillus bulgaricus.
https://eatbeautiful.net/why-most-yogurt-turns-into-accutane-in-your-body-how-to-choose-yogurt-at-the-store-make-your-own-which-probiotic/
Another eye-opening article from Megan Stevens:
Why Most Yogurt Turns into Accutane in Your Body (and how to choose yogurt at the store or make your own)
Some bacteria (probiotics) can chemically change nutrients (in this case a precursor to vitamin A, retinol) into different forms inside the body.
In this case, Streptococcus thermophilus, added to almost all commercial yogurts, was shown to strongly change natural vitamin A into a different form called 13-cis retinol.
That matters because 13-cis retinol is turned by the body into 13-cis retinoic acid, a very powerful vitamin A compound also known as isotretinoin (also known as Accutane).
The most surprising discovery from my research is that, since 1981, U.S. law has required all products labeled as yogurt to contain both Streptococcus thermophilus and Lactobacillus bulgaricus.
https://eatbeautiful.net/why-most-yogurt-turns-into-accutane-in-your-body-how-to-choose-yogurt-at-the-store-make-your-own-which-probiotic/
ggenereux, Hermes and 3 other users have reacted to this post.
ggenereuxHermesArminTanveenGinny
Quote from
Armin on September 29, 2026, 9:34 am
The microbes in traditional yogurt are nothing amazing so I've always avoided thermophilus or bulgaricus.
Thermophilus creates accutane and bulgaricus creates acetaldehyde
The microbes in traditional yogurt are nothing amazing so I've always avoided thermophilus or bulgaricus.
Thermophilus creates accutane and bulgaricus creates acetaldehyde
Hermes, Livy and Ginny have reacted to this post.
Quote from
Livy on September 30, 2026, 6:20 am
Thank you for the information about Lactobacillus Bulgaricus, @armin!
It seems that Thermophilus and Bulgaricus are an even deadlier duo when working in tandem. I saw this online in a google search:
While L. bulgaricus produces acetaldehyde on its own, it produces significantly higher amounts when paired with Streptococcus thermophilus. These two bacteria share a symbiotic relationship in yogurt fermentation, mutually stimulating each other's growth and compounding the total flavor profile. [1, 2, 3]
It would be interesting to see if the Accutane-generating effects of Thermophilus are similarly enhanced by being paired with Bulgaricus. I will investigate.
Thank you for the information about Lactobacillus Bulgaricus, @armin!
It seems that Thermophilus and Bulgaricus are an even deadlier duo when working in tandem. I saw this online in a google search:
While L. bulgaricus produces acetaldehyde on its own, it produces significantly higher amounts when paired with Streptococcus thermophilus. These two bacteria share a symbiotic relationship in yogurt fermentation, mutually stimulating each other's growth and compounding the total flavor profile. [1, 2, 3]
It would be interesting to see if the Accutane-generating effects of Thermophilus are similarly enhanced by being paired with Bulgaricus. I will investigate.
Armin and Ginny have reacted to this post.
Quote from
lil chick on October 3, 2026, 3:00 pm
Hi Guys! So what if you, for some reason, (say, antibiotics) you have a gut that needs repopulation, and these guys set up shop?
I remember reading about a guy who had such bad overgrowth of his yogurt bacteria, that it even set up shop in his heart. It was on a YouTube channel called "chubby emu" that talks about all the weirdest cases of poisoning etc. that come into a hospital.
Hi Guys! So what if you, for some reason, (say, antibiotics) you have a gut that needs repopulation, and these guys set up shop?
I remember reading about a guy who had such bad overgrowth of his yogurt bacteria, that it even set up shop in his heart. It was on a YouTube channel called "chubby emu" that talks about all the weirdest cases of poisoning etc. that come into a hospital.
ggenereux has reacted to this post.
Quote from
Armin on October 3, 2026, 3:28 pm
Quote from
lil chick on October 3, 2026, 3:00 pm
Hi Guys! So what if you, for some reason, (say, antibiotics) you have a gut that needs repopulation, and these guys set up shop?
I remember reading about a guy who had such bad overgrowth of his yogurt bacteria, that it even set up shop in his heart. It was on a YouTube channel called "chubby emu" that talks about all the weirdest cases of poisoning etc. that come into a hospital.
Most probiotics do not take up permanent residence. More likely after antibiotic wipes. We kinda wish they would but it's kinda good that they don't so overgrowth doesn't become a thing.
People with immunocompromised states are more likely to have microbes become systemic but that is very very rare.
Quote from
lil chick on October 3, 2026, 3:00 pm
Hi Guys! So what if you, for some reason, (say, antibiotics) you have a gut that needs repopulation, and these guys set up shop?
I remember reading about a guy who had such bad overgrowth of his yogurt bacteria, that it even set up shop in his heart. It was on a YouTube channel called "chubby emu" that talks about all the weirdest cases of poisoning etc. that come into a hospital.
Most probiotics do not take up permanent residence. More likely after antibiotic wipes. We kinda wish they would but it's kinda good that they don't so overgrowth doesn't become a thing.
People with immunocompromised states are more likely to have microbes become systemic but that is very very rare.
Quote from
Ginny on October 4, 2026, 8:07 pm
@lil-chick Welcome back! I was getting worried 😟 !
@lil-chick Welcome back! I was getting worried 😟 !
ggenereux has reacted to this post.
