Does air exposure weaken testosterone cypionate

I understand that testosterone has a shelf life, I am trying to understand what would make it weaken (ie temperature, light etc). Would injecting air into a vial weaken it? I experimented with injecting air into the vial a few times (maybe 5) to see if it would react with extra components in it as I was wondering if they were giving me side effects. However, sometimes it feels like my testosterone isn’t as strong, I wonder if this could weaken it or maybe it’s just in my head.
 
I understand that testosterone has a shelf life, I am trying to understand what would make it weaken (ie temperature, light etc). Would injecting air into a vial weaken it? I experimented with injecting air into the vial a few times (maybe 5) to see if it would react with extra components in it as I was wondering if they were giving me side effects. However, sometimes it feels like my testosterone isn’t as strong, I wonder if this could weaken it or maybe it’s just in my head.

Would not fret over injecting air into the vial as it is a common practice before drawing the oily solution.

I never inject air into my vials not because I am worried about any degradation but see no point as I have never had an issue with drawing out the medication even when using an LDS insulin syringe 27-31G!

Still a quick process for me.

This sums it up.

 

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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

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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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