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ForumsLab Results & BiomarkersSHBG changes during weight loss on GLP-1 — hormonal implications Page 2

SHBG changes during weight loss on GLP-1 — hormonal implications

Dr.ReproEndo Tue, Mar 3, 2026 at 2:44 AM 17 replies 420 viewsPage 2 of 4
CarlaRPh_TPA
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Mar 3, 2026 at 5:34 AM#6
a, your results are a beautiful illustration of how PCOS is fundamentally a metabolic disease in many cases. The mechanistic chain: 1. Insulin resistance → hyperinsulinemia 2. Excess insulin stimulates ovarian theca cells → excess androgen production 3. Excess androgens → anovulation, hirsutism, acne 4. GLP-1 reduces insulin resistance → less hyperinsulinemia → less ovarian androgen production Your SHBG doubling from 22 to 48 is key — improved insulin sensitivity directly increases SHBG production by the liver, which binds excess testosterone and reduces the bioavailable/free fraction. The AMH decrease from 8.2 to 6.1 may indicate improvement in polycystic ovarian morphology — high AMH in PCOS reflects excess antral follicles. For PCOS patients considering fertility, this is extremely relevant. Several case series have shown restoration of ovulation in previously anovulatory PCOS patients on GLP-1 therapy.
Last edited: Mar 3, 2026 at 9:34 AM
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pete_RVA
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Mar 3, 2026 at 5:51 AM#7
Amazing information in this thread. I'm going to talk to my urologist about a plan similar to Mike's once I've lost enough weight. I'm starting tirzepatide next month (just got approved). Current stats: 258 lbs, on TRT (total T on TRT around 580). Goal is to lose 50+ lbs and then attempt a supervised TRT discontinuation. Question for Dr. HormoneBalance — is there a threshold of weight loss where it becomes reasonable to try discontinuing TRT? Or is it more about time on GLP-1?
Last edited: Mar 3, 2026 at 10:51 AM
3 1Dr.Martinez, mike_mod, SarahChen_PharmD
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Dr.PulmRoch
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Mar 3, 2026 at 6:08 AM#8
Great question Tom. There's no hard threshold but general guidelines: - Minimum 15% body weight loss before attempting discontinuation - At least 6 months of stable weight loss (not during active rapid loss phase) - Pre-TRT testosterone should be reviewed — if it was 180 ng/dL, recovery is less likely than if it was 280 - Age matters — men under 45 have better HPG axis recovery than those over 55 - Duration on TRT — shorter duration = better recovery potential I typically check LH while still on TRT at low dose. If LH starts showing any recovery even while on exogenous testosterone, that's a strong signal that the axis wants to restart. Then we do a supervised taper with SERM support (clomiphene or enclomiphene) as Mike described.
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mike_mod
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Mar 3, 2026 at 6:25 AM#9
Go for it Tom. Honestly, coming off TRT after weight loss has been one of the most empowering health experiences of my life. Not needing weekly injections, not worrying about hematocrit rising, not dealing with estrogen management — it's freedom. And my libido is actually BETTER now than it was on TRT, probably because my estradiol is in a better range naturally. Keep us posted on your journey! 💪
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