Recent bloodwork

Test cyp 65mg e3.5d = 130 per week
Primobolan 110mg e3.5d = 220 per
125iu HCG e3.5d - 250 iu per week

my trough bloodwork just came back after 8 weeks of primobolan on top of the test cyp

total test = 521ng/dl which we all know where this is mid range
free test =27pg/ml which is just out of range on the top end
estradiol sensitive = 4pg/ml which is below the bottom of the reference range

my hemoglobin and hematocrit are both middle range and seem to be unaffected by the primobolan

it seems primo boosts free test and severely lowers estrogen... this may be helpful to those who live where this drug is legal and don't want to use an AI to lower estrogen... I would probably even lower this dose to 50-100mg per week if i tried this again to see if my estradiol stays higher. it seems that this estrogen number didn't affect me in any negative way, sexually or otherwise.
 
Test cyp 65mg e3.5d = 130 per week
Primobolan 110mg e3.5d = 220 per
125iu HCG e3.5d - 250 iu per week

my trough bloodwork just came back after 8 weeks of primobolan on top of the test cyp

total test = 521ng/dl which we all know where this is mid range
free test =27pg/ml which is just out of range on the top end
estradiol sensitive = 4pg/ml which is below the bottom of the reference range

my hemoglobin and hematocrit are both middle range and seem to be unaffected by the primobolan

it seems primo boosts free test and severely lowers estrogen... this may be helpful to those who live where this drug is legal and don't want to use an AI to lower estrogen... I would probably even lower this dose to 50-100mg per week if i tried this again to see if my estradiol stays higher. it seems that this estrogen number didn't affect me in any negative way, sexually or otherwise.
Keep in mind the primo is probably competing for SHBG and androgen receptors
 

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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