expiration dates

  1. DragonBits

    testosterone cream from 2019

    Just interesting. I ran out of my testosterone undecanoate that I typically use. The place in India I had been ordering it from must have had some sort of legal problem,they are still around but changed the name (slightly) but their email was the same. So I contacted them via email, and...
  2. K.pietera

    Expired date testosterone cream

    Hello , I am searching the web for info about whether or kot testosterone cream can really expire but I can't seem any info about it can you guys tell me a little bit more about that ? I am on a 20% transcrotal testosterone cream mysellf and I was wondering if the expiration date is really...
  3. A

    Vial expiration question

    So I was using a 10ml vial from Walgreens back in February and couldn’t find it so moved to the next. I did about 5 shots. Well today I found it safely stored in a drawer room temp and was wondering if ti would be safe to use after my current vial (so like June) or would it lose potency by then...
  4. F

    Testosterone Cream Shelf Life

    Does anyone here have any opinions (scientific or anecdotal) on the shelf life of testosterone creams? I have a cream from a local pharmacy that was compounded in 12/2019. I know the "official" answer is to throw it away, but I am curious if anyone here has any experience with this...
  5. T

    Expiration Date for TRT/HCG

    How long after first use of a bottle of TRT/HCG until it expires and can no longer use it? The bottle of TRT has been kept in a dark cabinet, the HCG in the fridge.
  6. Z

    Testosterone Vial Expiration

    So I was on the phone today with cvs about my testosterone prescription. And they said they can’t fill a 10ml vile for a 90 day supply because after 28 days it goes bad. So they have to use 1 ML vials. I have never heard of test going bad after 28 days. The old pharmacy I use to get it from was...
  7. Nelson Vergel

    The Myth of Drug Expiration Dates

    The idea that drugs expire on specified dates goes back at least a half-century, when the FDA began requiring manufacturers to add this information to the label. The time limits allow the agency to ensure medications work safely and effectively for patients. To determine a new drug’s shelf life...
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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