Test Cyp and B12

I have a quick question, I know back in the day many bodybuilders would load different ester's ( hope thats the right term) and pin a larger dose..with that theory could one load B12 into a Test cyp shot AKA mix the two so your not doing two shots at a time but just one. Sorry if this was an overly stupid question.
 
I'm one of the few guys at the test doc I go to that receives them both in the same shot. It was the norm at this practice until just recently and now they do not encourage anyone to mix the two. They said a ton of guys were complaining about lumps at the injection site. Their theory is, with the test, we are creating a pocket in the muscle, where one didn't previously exist. And now we're adding B12 to that same pocket, creating even more volume, resulting in the lump. Again, I never had that problem, but evidently enough have to cause them to no longer do it. After the change, they claim to no longer have guys bitchin about lumps. Who knows. Yet another example of how everyone is different.
 

hCG Mixing Calculator

HCG Mixing Protocol Calculator

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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