Top
10
Doctor insights on: Free Testosterone

Share
1

1
Please tell me what's the difference between free testosterone and total testosterone?

Please tell me what's the difference between free testosterone and total testosterone?

Think HS prom nite: Most Testosterone is bound up by Sex Hormone Binding Globulin (SHBG) and is unavailable to do what we associated w/T. Only a small fraction of Total T is available, what we measure/calculate as Free T. Think of Total T as all the girls at your high school's formal dance. Most attended w/their date (represented by SHBG). You're more interested in those girls who attended by themselves eg Free T. ...Read more

Dr. Alvin Lin
1,720 doctors shared insights

Testosterone (Definition)

Testosterone is a hormone/androgen which is a kind of ...Read more


2

2
Is 1.3per cent free testosterone considered low?

Is 1.3per cent free testosterone considered low?

No: Unfortunately many labs do not break down measurement levels by age. However studies were done and show that at your age of 80 the total testosterone average is 470 ng/dl and the free testosterone average is 6.0 which is 1.28% of 470 So here's the good news:yours is normal. ...Read more

3

3
Managing Low Testosterone (Checklist)

Have morning testosterone checked
Once
Discuss the risk and benefits of testosterone replacement with doc
Once
Take testosterone replacement as instructed
Once
4

4
What should an Accurate TRT dosage be?doctor says 400mg/week and I'm only 17 YEAR OLD MALE With hypogonadism total testosterone result is 336 range 350-1200ng/dl, free testosterone 78.8 range 190-800

What should an Accurate TRT dosage be?doctor says 400mg/week and I'm only 17 YEAR OLD MALE With hypogonadism total testosterone result is 336 range 350-1200ng/dl,  free testosterone 78.8 range 190-800

Testosterone: There is no "accurate" or fixed dose. 400 mg/wk is a big dose. Too much emphasis is placed on blood levels. If you are hypogonadal, treatment should be given to achieve objectives, eg growth, puberty, male characteristics, bone health, etc. More T is not necessarily better; a blood level of 1000 is not nec better than 500 (just more side effects). You should be seeing an Endocrinologist. ...Read more

Dr. Alvin Lin Dr. Lin
1 doctor agreed:
7

7
Do very low free testosterone levels (below 100) usually go along with infertility in a male?

Dr. Alvin Lin Dr. Lin
1 doctor agreed:

Depends . . .: It's possible to have issues w/enough lh or leydig cells such that testosterone is low yet fsh ; sertoli cells are fine so no fertility issues. However, taking testosterone in any shape or form will essentially render you infertile as it will shut down your fsh and thus sperm production. If you need to boost your t and maintain fertility, consider off-label hcg, Clomiphene or tamoxifen. Good luck! ...Read more

8

8
How much do testosterone levels vary in young men throughout the day. Should the levels always stay in the "normal" range. Free testosterone blood test was low but at 3:30pm , had two tests both low.

How much do testosterone levels vary in young men throughout the day. Should the levels always stay in the "normal" range. Free testosterone blood test was low but at 3:30pm , had two tests both low.

Vary throughout day: It varies throughout the day. We want to measure your peak level when evaluating for low testosterone. Lab draw should be before 10 am. If the level come back low, you need to find out the cause before jumping to treatment. ...Read more

See 2 more doctor answers
9

9
Is 1.3per cent free testosterone considered low?

No: Unfortunately many labs do not break down measurement levels by age. However studies were done and show that at your age of 80 the total testosterone average is 470 ng/dl and the free testosterone average is 6.0 which is 1.28% of 470 So here's the good news:yours is normal. ...Read more

10

10
Does 300 ng/dl of testosterone is enough for free testosterone?

Does 300 ng/dl of testosterone is enough for free testosterone?

300: If your testosterone levels have been measured and found to be normal you should not take any additional testosterone!!! If the levels are low your doctor will look for the cause and plan management or referral to an Endocrinologist. ...Read more

Dr. Alvin Lin
809 doctors shared insights

Testoderm (Definition)

Testoderm is a hormone/androgen which is a kind of ...Read more


Dr. Alvin Lin
812 doctors shared insights

Androderm (Definition)

Androderm is a hormone/androgen which is a kind of ...Read more