rod stewart
New Member
Re: LEF's Take on Low SHBG
thank you for posting that james
very interesting
thank you for posting that james
very interesting
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It's nice to see that people are finally waking up.
SHBG is one of the most important values in your bloodwork. Morons like Dr. Shippen (and previously, Dr. Crisler) completely ignore it.
In a new study published in PLoS Genetics, researchers from the CHARGE Sex Hormone Consortium analyzed DNA from over 14,000 men of European descent and identified SNPs associated with low blood testosterone. The authors reported that the G version of rs12150660 near the SHBG gene was associated with lower blood testosterone levels. They also found that the T version of rs6258, located within SHBG, was independently linked to lower levels of testosterone.
(23andMe customers can view their data for these and other SNPs in the Sex Hormone Regulation Preliminary Research report.)
The fact that variations in SHBG are linked to testosterone levels may not be surprising because SHBG codes for a protein that binds testosterone in the blood. With additional experiments, the researchers observed that the versions of rs12150660 and rs6258 associated with lower testosterone levels were also linked to lower concentrations of SHBG. Moreover, the SHBG proteins in men with the T version of rs6258 bound testosterone poorly compared to those in men without the T version.
Very interesting and it raises my eyebrow to this issue. Seems like T levels correlate with SHBG levels in this case Scally posted as well:
Also note that he still experiences symptoms given his high SHBG levels though.
Elevated Serum Testosterone and Sex Hormone Binding Globulin Associated with Sexual Dysfunction
[SUN-79] Elevated Serum Testosterone and Sex Hormone Binding Globulin Associated with Sexual Dysfunction: A Familial Disorder?
Result Content View
Thanh Duc Hoang, Vinh Q Mai, Patrick W Clyde, KM Mohamed Shakir. Walter Reed National Military Medical Center, Bethesda, MD.
Background: Elevated sex hormone binding globulin (SHBG) levels have been reported to be associated with increased insulin sensitivity, hyperthyroidism, reduced risk of type 2 diabetes mellitus (1,2) and sexual dysfunction in men with chronic hepatitis C infection (3). We report a familial case of hypertestosteronemia and elevated SHBG associated with decreased libido and erectile dysfunction.
Clinical case: A 37 y/o male with a 2-year history of gradually decreased libido and erectile dysfunction was found to have repeated elevation of serum testosterone and SHBG levels. He shaves daily and denies any headaches, vision changes, breast enlargement, chest pain, shortness of breath, or weight changes. Past medical history was significant for shingles and seasonal allergy. He was taking a multivitamin daily. He never smoked and drank 2 beers weekly. He has 2 healthy children. He reports a family history of hypertension and diabetes mellitus.
Vital signs: BP 122/71, HR 60 bpm, weight 176 lbs, height 72 in, and BMI 24 kg/m2.
Physical examination: normal thyroid, no gynecomastia, no galactorrhea, normal phallus, testicles 25 cc bilaterally without palpable mass. Heart, lungs and neurological examination was normal.
Lab results: 8 A.M serum total testosterone 1186-1448 ng/dL (nl 250-1100), free testosterone 141-169 pg/mL (nl 35-155), SHBG 86-98 nmol/L (nl 10-50), LH 8.8 mIU/mL (nl 1.5-9.3), FSH 6.0 mIU/mL (nl 1.4-18.1), estradiol 58.8 pg/mL (nl 7.6-42.6), and TSH 1.09 mcIU/mL (nl 0.27-4.20).
Fasting glucose, prolactin, HCG, CBG, liver associated enzymes, hepatitis and congenital adrenal hyperplasia panels were normal. Clomiphene challenge test was normal.
Abdominal CT scan showed normal liver and adrenal glands.
Pituitary MRI, testicular ultrasound, baseline DXA scan, and EKG were all normal.
Testing of his 11 y/o daughter and 8 y/o son revealed SHBG values of 158 nmol/L (nl 24-120) and 120 nmol/L (nl 32-158) with total testosterone levels of 13 ng/dL and 5ng/dL (nl <25), respectively. Estradiol and TSH levels are normal for both children.
Conclusions: The patient most likely has familial elevated SHBG leading to hypertestosteronemia, given the fact that his daughter also has elevated SHBG and his son with high-normal SHBG. To our knowledge, hypertestosteronemia due to familial elevated SHBG has not been reported previously. Patients with hypertestosteronemia and elevated SHBG need further investigations, including possible genetic studies.
(1) Lakshman KM et al., J Gerontol A Biol Sci Med Sci 2010; 65:503-9.
(2) Perry JR et al., Human Molecular Genetics 2010; 19: 535–544.
(3) Rao J et al., J Clin Gastroenterology 2009; 43:94-95.
From October 11, 2011: https://thinksteroids.com/community/threads/134312460
There is nothing in this study that contradicts anything I have posted. In the intervening 8+ months, what is of new relevance? What is the oversight?
[I have previously written on the controversy for the "free hormone hypothesis." https://thinksteroids.com/community/posts/685695 & https://thinksteroids.com/community/posts/474319 . At no time, do I recall ever saying SHBG is not of import. Further, I have posted that a bioassay would be a better measure of androgen activity, but this is not available and what would be measured. AR polymorphism would be another possible factor. ]
What are your T levels at 125 mg ? I think its good that you have at least experienced a libido boost and some mood and cognition positives, in my opinion you can regain them if you have experienced them even once , it must be a matter of schedule/dosage and balancing everything. For me however i am worried that i havent seen any improvement at all in these aspects and i am fearing the possibility that the problem will never be fixed.
So. I just went to the endo for blood updates:
T total: 174,4 [200-800]
free T: 4,5 [6,3-21]
LH: 2,1 [1,8-6,5]
FSH: 2,3 [2,1-7]
SHBG: 15,4 [14,4-54]
E2:.7,4 [7,6-34]
Thyroid ok
Glucose ok
So, apparently I have low everything. This is not entirely consistent with the numbers other shbg sufferers have posted. My low shbg is probably due to the low E2.
I am now prescribed 10 mg tamoxifen ED. Should force my lazy pituitary to pump out the gonadotrofins. Is 10 mg a normal dose btw?
