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Questions tagged [endocrinology]

The branch of physiology and medicine concerned with endocrine glands and hormones.

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How does Spironolactone affect fertility with women with PCOS? Does it improve fertility?

If one takes Spironolactone, which lowers androgen levels, for Poly-Cystic Ovarian Syndrome (PCOS), how does it impact fertility in a woman? Fertility issues abound in women who have PCOS, and ...
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Eczema and steroids: why do endogenous cortisol and exogenous cortisone/prednisone differ?

Topical steroids are a mainstay treatment for eczema, and severe episodes are sometimes treated with oral steroids. Meanwhile stress is a known trigger for exacerbating eczema. During physiological ...
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Can removing a contraceptive implant cause secondary amenorrhea?

When a woman stops taking birth control medication, she might suffer from various side effects. Can secondary amenorrhea (i.e. missing periods for more than 3 months) be induced by the removal of a ...
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What is the link between elevated estrogen and lowered alkaline phosphatase?

This Wikipdia-article lists several conditions or diseases that may lead to reduced levels of alkaline phosphatase (AP). Among them are: postmenopausal women receiving estrogen therapy because of ...
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Does elevated potassium lead to elevated cortisol?

I came across this statement on Selfhacked: If you have high cortisol, you will do worse with a high salt diet and you will be potassium deficient in the long term (few people as it is get the RDA)...
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What are the changes of diamine oxidase (DAO)-activity with different sex hormones?

Based on this question: What happens to a woman if she takes testosterone? i have another question and would like to know more - that's because i've stumbled over this: DAO activity in tissues of ...
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Causes for elevated beta-HCG and AFP

I am interested in finding possible causes of elevated levels of beta-HCG and Alpha-1-Fetoprotein in males. However, as much as I see, the only answer I find relates to cancer, and my curiosity is ...
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Can an elevated TSH and normal T3 and T4 biologically cause fatigue?

I understand that if the levels of T3 and T4 are lower than normal, that this could directly lead to fatigue since these hormones directly regulate metabolism inside every cell. But is there an ...
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What happens to a woman if she takes testosterone?

I'm interested in the changes that happen to the female body (let's say this person is 20) in the short (year one to five) and in the long term (20+ years). Let's assume that the dose of testosterone ...
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Effectiveness of blue light filters for preventing delayed and decreased melatonin secretion?

The iPhone offers a "night shift" feature. Research indicates that blue light exposure decreases melatonin secretion (e.g., Ferguson, Melton, Li, Park, & Tosini, 2008). To what extent do built-...
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263 views

Why Dydrogesterone is no longer available in US? Why dienogest is not approved?

Dydrogesterone and Dienogest are very very helpful medications in treating endometriosis condition, and Dydrogesterone helps many women to become pregnant. They are widely used around the world and ...
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Effects of hypophosphatemia on DNA

There is a lot of supportive evidence that its role in ATP results in much of the clinical manifestation of hypophosphatemia, but I was wondering about the other roles where Phosphate is an important ...
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transdermal estrogen use sans progesterone & endometrial and breast cancer risk?

To what extent does transdermal estrogen use, without co-use of progesterone, increase endometrial and breast cancer risk? How does risk, if it exists correlate with years of use?
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How does metformin interact with nicotine?

Does co-use of nicotine replacement therapy and metformin increase lactic acidosis risk? If so, how?
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How low can you go?

If the thyroid gland just completely stopped working and it went untreated, how long would it take for your thyroid hormones to get to dangerously low levels? At what point does Myxedema Coma occur?
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menorrhagia in early hyperthyroidism

What is the pathophysiology of menustral irregularities in hyperthyroidism? Especially early menorrhagia seen in early hyperthyroidism?
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Why doesn't food taste good to my mouth?

Sorry I couldn't find a better title but by this question I'm not really looking for a cure. I'm just curious to know what happened to me and in my body. So I would never enjoy food except a couple ...
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Impact of Various “Feminizing” Hormones on Metabolism

I've read that progesterone is linked to changes in metabolism and appetite, and that those undergoing hormone therapy with progesterone often experience profound changes in hunger and meal habits. I ...
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Amount of phytoestrogens in processed soy like tofu

Does anyone know the amount of phytoestrogens like genistein in for example cooked soy, tofu, tempeh etc.?
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Low Insulin but Normal Blood sugar

What does is mean when fasting Insulin Levels are Very Low (0.7 uU/ml) but Fasting Blood sugar levels are normal 4.2 mmol KD.
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Why do guys develop “abs” more easily than girls?

Is there something different in the muscle structure for males vs. females? Or does it have to do with hormones?
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570 views

What is the relationship between hormones and proteins?

What is the relationship between hormones and proteins: are hormones a group of specific proteins (or vice versa)? Or are there some hormones that are not considered proteins (or vice versa)? Can ...
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1answer
360 views

Does blindness stop the production of melatonin?

Melatonin is the hormone that gives the "expectation" of darkness. It has no use in blind people, so do they slowly stop (or immediately) secreting it? I heard it is given artificially to help with ...
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1answer
320 views

Lab test result meaning

Why in this lab test results the microsomal antibodies amount has less sign and thireoglobulin antibodies don't have this sign? I did not question it first but now I have suspicion may be I am not ...
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Thyroid Peroxidase (TPO) Ab Test- normal or abmormal

I had a variety of test ran on my thyroid and I'm waiting to see the DR. My question is the TPOAb reference rang is 0-34. Mine came back as 9 IU/ml. Is this still considered normal or abnormal? I also ...
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What is Surya Namaskar Yoga?

Can we cure hormonal imbalance by doing Surya namaskar? and what is the best time and place to do it ?
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Is there any risk from eating meals before/after HGH shots?

I'm undergoing HGH therapy, and I see a lot of conflicting information on the internet another whether or not it's truly bad to eat meals after/before the shots -- supposedly, it can increase the risk ...
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If a man occasionally wakes up after five hours of sleep, is it safe for him to take melatonin even though the night is almost over?

Melatonin, a hormone, is sold over-the-counter in the US and Canada. Bedtime is a good time to take melatonin Clinical psychologist Michael Breus writes: Melatonin is a sleep and body clock ...
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Estrogen level after sex

Estrogen levels ought to elevate after having sex in women and thus improve skin and hair quality. I do not find the scientific proof for this statement. Who can help?
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Link between phenylalanine and Hyperaldosteronism?

I've obviously googled, but I was curious if anyone with actual medical knowledge has seen any studies linking elevated dietary sources of phenylalanine and Hyperaldosteronism.
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1answer
858 views

Does taking melatonin cause a reduction in the amount of melatonin the brain produces?

I take melatonin fairly frequently, but I have noticed that it does not work as well as it once did. I am wondering if by taking melatonin, the brain reduces its natural production of melatonin.
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Refrigeration for peptides

I left a bottle of peptides on my desk without refrigeration for about 24 hours. Are the peptides ruined? My house is generally kept cool and the bottle was cool to the touch when I picked it up again....
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Pins and needles? [closed]

I tend to get the pins and needles sensation in my chest, neck, or head after or during running (normally run at ~6 mph). I also tend to feel formication on my arms and legs (especially when not ...
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Is there any harm in taking a melatonin supplement every night?

I noticed that a bottle of melatonin supplement is labelled "For Occasional Sleeplessness". The use of the word "Occasional" surprised me. Is there any harm in an adult taking a melatonin supplement ...
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What hormonal or other physiological cycles occur in men?

Physiological cycles are common in all mammals, including humans. Some of these cycles are seasonal, some circadian, some roughly monthly. Menstrual cycles in women are the most common and most ...
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481 views

What are the benefits of high testosterone in men?

It's common to hear about products that claim to be testosterone boosters for men and vitamins that boost testosterone, but what benefits does high testosterone actually entail? For example, are ...
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649 views

Does hyperthyroidism affect serotonin levels?

I have read that hyperthyroidism can cause depression. Is this because of low serotonin levels or is there is another cause? Does this kind of depression need to be checked by a psychiatrist? Edit (...
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553 views

What are the long-term side effects of melatonin?

What are the long-term side effects of taking melatonin as an oral supplement? The couple of articles I have read are inconclusive: http://www.huffingtonpost.com/2015/03/11/what-is-melatonin-...
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1answer
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Can pregnancy lead to growing taller?

In an adult that has finished growing, is it possible to grow more during pregnancy? I've been assured this is possible by some relatives, and also a friend who swears she grew an extra inch when ...
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Hashimoto thyroiditis leading to severe psychological problems and behavior changes?

Can Hashimoto thyroiditis lead to psychological problems and severe behavioral changes? Do existing psychological problems (anxiety, depression, etc.) 'compound' when layered with Hashimoto ...
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Is there a synergistic effect between phosphate and testosterone in respect to Physiology?

For example: A patient's blood analysis results come through, and it states that the patient has high testosterone and high phosphate levels. What are the likely causes of this, assuming/...
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1answer
47 views

Low dose and high dose dexamethason supression test

What is the difference between high dose and low dose dexamethason suppression test in Cushing Syndrome diagnosis?
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How does ones TSH tend to vary over the course of a day?

A single TSH (Thyroid Stimulating Hormone) blood test is commonly used to help diagnose thyroid problems, however my understanding is that the TSH tends to vary substantially over the course of a day, ...
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Routine exams in patients with hypothyroidism

In people with hypothyroidism that is being treated with thyroid hormones and that are not showing symptoms or hypothyroidism, how often should these tests be performed: TSH blood test T4 blood test ...
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Are there any hormones that are only present in children and not adults?

I am trying to ascertain whether or not there are hormones only evident in children which then desist with growth & age. I have found nothing of any use from google, wondered if perhaps here ...
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1answer
385 views

Causes of polypoid foveolar hyperplasia

Six years ago during an endoscopy, the gastroenterologist noted that he had seen a small nodule forming in my stomach. A recent endoscopy revealed 3 nodules. The biopsies showed that they were benign,...
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Do combined oral contraceptives cause weight gain?

I started Lo Loestrin Fe (a combined estrogen-progestin oral contraceptive pill) about 4 months ago. The first month on it, I got my period. The second month, I did not. The third month I got it. Now, ...
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126 views

What are the causes of Chronic Diarrhea?

What are the main causes for chronic diarrhea and frequent mouth ulcers when the following is true: Patient's hormones are normal Patient's endoscopy and colonoscopy are normal Patient does not have ...
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1answer
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Usage of progesterone for recurrent miscarriages

On news and pregnancy sites* (which are notoriously full of things not supported by science), I have read that progesterone is sometimes given to women suffering from recurrent miscarriages (3 or more ...
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What are the testosterone tests that I can take to prove that my low libido is really a testosterone problem?

I understand that ( correct me if I am wrong) the Sex Hormone Binding Globulin ( SHBG) test is one of the tests that can be used to evaluate one's libido. The sex hormone binding globulin (SHBG) ...