needle size

  1. S

    27G x 1/2 VS 25G x 5/8

    Switched from IM to SQ a few months ago, been using 25G x 5/8 insulin syringe at 90 degrees in my incredibly fat belly. Specifically, between 2-4 inches away from the belly button on either side. The way it “feels” and how quickly i react to it, i think im actually doing a shallow IM...like im...
  2. O

    Needle Gauge for IM/Quads

    Please, I'm not looking for recommendations to switch to my delt or VG. Or to switch to SubQ. I may look into those in the future. For now, I'm just asking about IM in quads. My doc gave me an Rx for 18g needles for drawing and 21g/1-inch needles for IM injections into quads. Two questions...
  3. J

    5/16 needle in deltoids

    Lately I’ve been injecting daily with a 5/16 (8mm) 30G needle in my deltoids. I wonder if this is still considered a shallow IM injection or rather subq? I’m fairly lean (14%) and my shoulders are muscular from heavy lifting for years. Any ideas?
  4. R

    Gel or inject ?

    I have been using T gel for many years, 2 packets of 1% , 50mg /packet / day. I am considering a change to injectable test/cyp, really just for the cost factor. I just moved to medicare and the deductable plus the cost of the gel is pretty high. I am wondering about the cycle of high to low...
  5. T

    Starting cypionate tomorrow - needle size?

    What needle size can I get away with? I'll never inject more than 0,2ml (in cottonseed oil). Doctor wants me to do subq but I believe I'll do IM. And do you have any tips for muscles? I'd prefer not to do delts and was thinking about starting with quads.
  6. M

    IM Shallow injection needles

    Hello to everybody. A 30 gauge needle is too small to inject oil in the quadriceps? Thank you.
  7. A

    Best needle size

    Hi crew, Just after a bit of advice on best needle sizes for a glute intramuscular injection. I am currently injecting E3D and just want to make sure I am using the current needle size to draw and inject with. I am 6ft 4 and about 110kg with about a bit of belly fat. What is the best...
  8. W

    27G Needle Shredded Molecules?

    Hey everyone. Haven't posted in a while but still browse the site from time to time. I have been using 25 5/8" with detachable needles. It has low dead space but I have noticed I am losing about .1 - .2 cc in the actual detachable part of the needle. Has anyone else notice this with detachable...
  9. F

    Needle length question

    I have tried subq (3/8" 26g), IM 1/2" 28g, and IM 5/8" 25g. I seem to feel way better using the 5/8" needle pushed in deep (so maybe 1" in). Does this make any sense or is it a coincidence? Or is it based on the location I'm injecting (usually ventroglute, lateral quad, or delt)? When I say...
  10. burnoutat42

    Is A 5/8 Needle long Enough When Injecting In My Glutes?

    Hey There I started TRT six days ago, however I'm a tad bit concerned. The largest needle size I was sent is 5/8.. is this long enough? I'm injecting myself in my glutes alternating from left to right every 3 days. Back in the day I became used to the big 18 gauge Sustenon 250 redijects...seems...
  11. E

    Needle Size

    I've followed the advice I've read on other threads and just ordered a 27g 1/2 inch insulin syringe. Since I started in August, I've been drawing with a larger needle and switching to either a 25 or a 27. Will I really be able to draw with the 27g 1/2? Also, there won't be any dulling of the...
  12. Lancealot

    What size syringe/needle is best?

    Hi all, Just started TRT 1 week ago today. Im going with subq injections for now. So far used small 31g 5/16 1cc (select brand), 29g 1/2 .5cc (covidien). The 31g took a little time to load and had to really push to get oil out. 29g was a bit better. I combine 5omg tcyp+175iu hcg 2xweek and...
  13. K

    what size needle for trimix?

    I got a Rx for Trimix today and I believe the needle is 30g - 1/2 inch. I thought about it afterwards, isn't a 1/2 needle too long? I don't want to inject it into my urethra. ;) she must think I'm "girthy".
  14. M

    MRK - Self Injecting Help...

    I just did my 4th self injection today. I have been using a 23 gauge 1.5" needle and I keep telling myself that this needle is way to long. Im 6'1" 225 athletic build besides the pot belly. I have tried the 1 inch needle but worried to much about it not going deep enough into the muscle. Well...
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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