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  1. M

    Metformin Lowers Testosterone?

    I posted my T labs above. I think it's pretty obvious Metformin had a sustained down-regulating effect on my levels. I will test again soon to see if it leveled off. How many others have seen their T levels plummet when on Metformin (on or off TRT)?
  2. M

    Metformin Lowers Testosterone?

    It definitely tanked my levels (see below) and I would advise the anyone who's not T2D be aware of this and perhaps not take it unless you're hormonally optimized (on TRT). June, 2022 (pre-Metformin): TT: 553; FT: 76.9 August, 2022 (1 month Metformin): TT: 415; FT: 70.2 November, 2022 (4 months...
  3. M

    Latest Update on Metformin

    My joint pains have worsened to which I attribute both low T and E2 symptoms. I think it's obvious I should d/c the Metformin until I get my hormones optimized.
  4. M

    Latest Update on Metformin

    My glucometer app does:
  5. M

    Latest Update on Metformin

    5-7 180lbs - but even when I weighed 20lbs less, my BP did not lessen. Have tested my DNA extensively for hereditary clotting issues and nothing came up except MTHFR. I feel I need be on TRT at this point and think I should d/c the Metformin for now until my T levels are optimized. Maybe start...
  6. M

    Latest Update on Metformin

    low 100s if I don't fast for at least 12h, in the mid to high 90s if I do. If I eat even complex carbs for dinner, FBG will go into the 110-115. A1C 4.9-5.2. Metformin doesn't seem to influence those numbers either way. I take 1g with last meal and 500mg before sleep.
  7. M

    Latest Update on Metformin

    Observations being on ER-Metformin for last 4.5 mos. (started July 1, 2022) 15lbs weight loss - no change in diet or training No GI problems up to 2g/day No change in fasting glucose levels or a1c (not diabetic to begin with) *Substantial decrease in total and free T (not on TRT): June...
  8. M

    TOO MUCH T3 FROM NDT = JOINT PAIN?

    Observation - Progressive increase in blood pressure/pulse averages: last 12 mos: 127/79/63 last 6 mos: 126/80/64 last 3 mos: 128/82/68 last mo: 131/84/67 causes: increasing NDT>increased serum T3 = elevated BP/pulse?
  9. M

    TOO MUCH T3 FROM NDT = JOINT PAIN?

    Have been doing it before for the last several labs this year to measure the effect of the dose.
  10. M

    TOO MUCH T3 FROM NDT = JOINT PAIN?

    When you say to keep your FT3 levels high, how high? I, too, have lately been doing my labs the same morning I take my NDT dose to see how the medication is working. And it is working as I can tell from the labs I posted on above. I guess I shouldn't be concerned with being a bit over range on...
  11. M

    TOO MUCH T3 FROM NDT = JOINT PAIN?

    That one relates to TSH over-suppression. Fortunately, not my problem. In fact, my issue has been high normal TSH and trying to suppress it more by gradually increasing the dose of NDT which it appears I have done. That latest level of 1.23 is right around where I need to be.
  12. M

    TOO MUCH T3 FROM NDT = JOINT PAIN?

    Didn't get rT3 tested this time, but I usually hover around 19 (but that was at a lower dose of NDT). Will test again soon. What I really am curious to know is whether too much T3 can accelerate cartilage degeneration which would give rise to OA and injuries. Maybe it's completely unrelated...
  13. M

    TOO MUCH T3 FROM NDT = JOINT PAIN?

    Never have had an indication of Hashi's from dozens of past labs and ultrasounds and as I indicated, I am on NDT, not Synthroid.
TRT Hormone Predictor Widget

TRT Hormone Predictor

Predict estradiol, DHT, and free testosterone levels based on total testosterone

⚠️ Medical Disclaimer

This tool provides predictions based on statistical models and should NOT replace professional medical advice. Always consult with your healthcare provider before making any changes to your TRT protocol.

ℹ️ Input Parameters

Normal range: 300-1000 ng/dL

Predicted Hormone Levels

Enter your total testosterone value to see predictions

Results will appear here after calculation

Understanding Your Hormones

Estradiol (E2)

A form of estrogen produced from testosterone. Important for bone health, mood, and libido. Too high can cause side effects; too low can affect well-being.

DHT

Dihydrotestosterone is a potent androgen derived from testosterone. Affects hair growth, prostate health, and masculinization effects.

Free Testosterone

The biologically active form of testosterone not bound to proteins. Directly available for cellular uptake and biological effects.

Scientific Reference

Lakshman KM, Kaplan B, Travison TG, Basaria S, Knapp PE, Singh AB, LaValley MP, Mazer NA, Bhasin S. The effects of injected testosterone dose and age on the conversion of testosterone to estradiol and dihydrotestosterone in young and older men. J Clin Endocrinol Metab. 2010 Aug;95(8):3955-64.

DOI: 10.1210/jc.2010-0102 | PMID: 20534765 | PMCID: PMC2913038

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