Jenn Simmons, MDThe Doctor with The Answer to Breast Cancer

Vegan Burnout: Dr. Jenn’s Thyroid Shut Down Without B12

Name: Vegan Burnout: Dr. Jenn’s Thyroid Shut Down Without B12
Uploaded: 2025-07-31T12:01:36+00:00
Duration: 50 s
Channel: Jenn Simmons, MD
Description: Dr. Jenn Simmons describes two years on a strict vegan diet that left her exhausted, swollen, and with a TSH of 112. She attributes the thyroid shutdown…

31 Jul 2025 · 1 min

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Dr. Jenn Simmons describes two years on a strict vegan diet that left her exhausted, swollen, and with a TSH of 112. She attributes the thyroid shutdown to B12 deficiency and never supplementing, a cautionary tale about what happens without it on a vegan diet.

Questions this video answers

About two years.

Approximately 112 (reported verbally as "like 112").

Chapters

And I'm about two years into really strict vegan and I'm gaining weight. I don't feel well. I have no energy. I start to get edematous and my voice is slowing down. I'm watching myself on videos and I'm actually talking slow. Like, I was a hot mess. The opposite of a hot mess. I was a cold mess. And I went and had my thyroid numbers measured and my TSH was like 112 or something like that. Like insane pain. My thyroid shut down. And it's because I was like a stupid vegan. I wasn't a Twizzler eating vegan. Like, not like that. I was a whole food vegan. But I was not supplementing with B12. And let me tell you, it does not work out well if you don't supplement with B12.