dr. crisler

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Dr. Crisler, SQ, and studies?

I was watching one of the late Dr. Crisler’s videos….i believe he mentioned there or in a blog that SQ injections end up raising T levels about 20% higher than same dose on IM i.e. 80mg total weekly SQ would get results like 100mg total weekly IM please someone correct me, as i think im not...
- Spetzal
- Thread
- Jan 20, 2023
- dr. crisler intramuscular john crisler subcutaneous injections
- Replies: 33
- Forum: Testosterone Basics & Questions
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Any options other than my primary doctor?

I’ve recently decided to find a new Dr. for my trt but I’m not sure where to look. Basically he just doesn’t know what he’s doing. I’ve talked with an anti-aging clinic near me and their program would run me a couple hundred a month and I’m not sure how reliable an anti aging clinic is. Are...
- Shad0w
- Thread
- Feb 5, 2019
- anti-aging dr. crisler trt options
- Replies: 9
- Forum: Questions for Specific Doctors & Experts
Our condolences to Dr. Crisler's family and friends

On behalf of Dr. Saya and the Defy Medical team, we would like to share our condolences with all of Dr. John Crisler’s family, friends, colleagues, and patients. Dr. Crisler’s time as a provider with Defy Medical makes this news even harder to bear. Although his professional relationship with...
- Jason Sypolt
- Thread
- Jan 17, 2019
- dr. crisler
- Replies: 1
- Forum: Testosterone Basics & Questions

TRT Hormone Predictor Widget

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