Supplemental thyroid raising estrogen?


Aug 16, 2012
I've seen numerous references to the above on this forum, and the facebook group. However, I can't track down where this information is coming from. Is it anecdotal from weight gain when taking NDT/Cyno? Very curious.


Feb 20, 2013
I have seen some people mentioning that kind of theory.
I do not remember seeing anyone providing any lab numbers, studies or
quote from RP. I have not heard RP saying anything like that.
This whole idea of thyroid increasing estrogen contradicts
the thyroid's ability to lower estrogen. I believe one possible
source of this idea is that so called " Pregnenolone StealTheory".
RP address this idea in an interview. In theory Pregnenolone and progesterone
both can break down into estrogen or cortisol and other stress hormones
But that is less likely to happen as Thyroid, progesterone, pregnenolone
all are anti stress hormones and they oppose estrogen.Progesterone directly nullify estrogen.
The end result should be decrease of estrogen and other stress hormones.
But if someone is taking thyroid and not eating enough food that can lead
to increase in all kind of stress hormones. Thyroid does increase need for
nutrients and calories by increasing metabolism in most cases. In some cases it lowers
need for calories by increasing efficiency. RP mentioned that progesterone
can increase serum estrogen by drawing out estrogen from cells to destroy it.
Thyroid does increase progesterone with the help of Vitamin A.
If someone sees increase in serum estrogen after using thyroid that is most likely
happening due to increase in progesterone.
I think RP articles and audio interviews are best source of nutritional information.
There are too many amateur scientists supplying false or partial information.


Dec 13, 2013
Estrogen increases when there is not enough nutrients to support a certain metabolic rate, even if the metabolic rate increases progesterone too. I think this is why some studies showed caffeine increases estrogen. If it's taken in the right amounts, it's likely to increase progesterone without increasing estrogen.
Similar threads
Thread starter Title Forum Replies Date
cyclops Optimal Way To Dose Higher Amounts Of Supplemental Thyroid? Thyroid and Hormones 11
C Vitamin D Helps Supplemental Thyroid Work Supplements, Pharmaceutical Drugs 3
haidut Caffeine Acts Like Supplemental Thyroid - It Suppresses TSH / GH Scientific Studies 31
Lee Simeon Supplemental minimalism Supplements, Pharmaceutical Drugs 47
Inaut Episode One Supplemental: Dr. Ray Peat Interviews 14
N Wisdom Teeth And Supplemental Hormones (Pansterone + Androsterone Low Dose) Logs 2
M Supplemental Cellulose Ameliorates LPS Induced Intestinal Permeability Scientific Studies 12
Kingpinguin Dietary Vitamin E But Not Supplemental Significantly Decreased Risk Of Parkinson Scientific Studies 11
fever257 Supplemental T3 Supplements, Pharmaceutical Drugs 8
L Why I Think Many People Have Issues With Supplemental Vitamin D Supplements, Pharmaceutical Drugs 43
I Anabolic Supplemental Options Supplements, Pharmaceutical Drugs 33
postman Supplemental Riboflavin (B2) And Insomnia B2 23
I Supplemental Calcium And Heart Health Supplements, Pharmaceutical Drugs 4
Amazoniac Swore By Their Favorite Plush Toy: Supplemental Gelatin Might Require Extra Vitamin B12 Meat, Organ Meat, Gelatin, Seafood 13
Giraffe Supplemental Vitamin B2 - Experiences? B2 36
B safely using supplemental CO2 CO2, Bag Breathing 27
sweetly Is Supplemental Vitamin D Safe? "RENAL POTASSIUM-WASTING INDUCED BY VITAMIN D" D 28
B Supplemental great lakes gelatin - does collagen hydrolysate taste any better? Gelatin 1
E Supplemental Potassium Minerals 11
lindsay Best/safest Form Of Supplemental Magnesium? Magnesium 101
P Supplemental Pregnenolone? Pregnenolone 5
M Supplemental D3 D 14
charlie Red Light Therapy, Lights, Supplemental Lighting Red Light, Infrared, LLLT 637
Serge New to thyroid medication Ask For Help or Advice 5
Elize TUDCA and oxbile and thyroid Metabolism 2
David PS Ray Peat Interview Jodellfit - Dr Ray Peat - Hormone Replacement, Thyroid, Frequent Snacking, Chronic Fatigue and more Q&A Interviews 4
ecstatichamster Can you get atrial fibrillation from thyroid supplementation Science 4
Q Taking thyroid vs red light on thyroid? Supplements, Pharmaceutical Drugs 5
Shontelle Thyroid, inflammation, infertility Blood Work, Labs 7
Vileplume Supplementing thyroid, heart rate lowering a TON — lowered adrenaline? Good thing? Natural Dessicated Thyroid 1
Mauritio GABA decreases flouride inuced hypothyroidism; more effective than thyroid hormone Thyroid and Hormones 11
E Been taking thyroid for months and still no improvements Synthetic Thyroid 4
F Help interpreting Thyroid Blood Work. Blood Work, Labs 3
L Skin on neck thyroid Ask For Help or Advice 0
S Advice Needed on Interpreting My Thyroid Labs Please! Blood Work, Labs 5
F Best timing for thyroid medication? Ask For Help or Advice 8
P PSSD - Thyroid - TRH connection Male Issues 14
Diokine Circadian T3 Method - why taking thyroid hormone at the proper time is important T3 & T4 63
J Dental X ray, to wear a thyroid shield or not.. Oral Health 12
F Thyroid antibody questions. Ask For Help or Advice 8
Advocate2021 Feedback on Thyroid Supplementation T4:T3 ratio 4:1 vs 3:1 Supplements, Pharmaceutical Drugs 0
S Clarification about Thyroid antibody tests Thyroid and Hormones 2
Advocate2021 High Cholesterol and High Thyroid on Bloodwork- Confused Blood Work, Labs 27
F how many of you managed to come off of thyroid ? Ask For Help or Advice 0
F Can thyroid glandulars cause autoimmune response? Ask For Help or Advice 2
Razvan Help with thyroid Thyroid and Hormones 7
W Thyroid Patients Canada website Resources 0
A Chronic Insomnia, Diffuse Thinning. Thyroid labs. Any help appreciated! Ask For Help or Advice 3
Herbie Ray used thyroid to slow his metabolism down. Everyone else doing the opposite. Danny Roddy 29
deliciousfruit confusion about body temperature and thyroid Metabolism 4

Similar threads