E. 133 Avoid These Common TRT Dosing Errors | Syringes, Units, and Concentration episode artwork

EPISODE · Jan 5, 2026 · 43 MIN

E. 133 Avoid These Common TRT Dosing Errors | Syringes, Units, and Concentration

from Self-Selecting · host Cory Hageman

In this episode, I break down some of the most dangerous and common dosing mistakes I see in TRT, peptides, and GH use, especially when clients self-administer without fully understanding concentration, syringe sizes, or math.As someone with a background in nursing and years of experience in this space, I’ve seen even the smartest and most experienced clients make errors in units, decimals, or conversion that result in adverse effects, visual changes, or major setbacks.I also dive into the differences between subcutaneous vs. intramuscular injections, lab work non-negotiables, how to interpret serum levels, and why it’s critical to be humble when it comes to this stuff, because even small mistakes can lead to irreversible outcomes.This is not a dosing tutorial - it’s a wake-up call for anyone using performance-enhancing drugs, HRT, or peptides without truly knowing what they’re doing.Timestamps:- [00:00 – 02:20] – Why med math matters: real risks with TRT, GH, and peptides- [02:20 – 04:23] – Overconfidence and real client examples of accidental overdosing- [04:23 – 06:46] – Switching concentrations? How simple math mistakes happen- [06:46 – 07:17] – Setting the record straight: this is not a how-to tutorial- [07:17 – 10:45] – Pre-mixed vs. reconstituted drugs and the impact on concentration- [10:45 – 14:14] – The dangers of decimal mistakes: units vs mLs vs mg- [14:14 – 17:37] – Real-life TRT dosing mistakes: drawing 10x more than intended- [17:37 – 19:43] – What 10mg/mL *really* means and avoidingconcentration confusion- [19:43 – 21:02] – Why labs are non-negotiable for accurate TRT monitoring- [21:02 – 25:24] – Adverse effects, visualization, and risks of overdosing- [25:24 – 30:16] – Injection techniques: subQ vs IM, needle trauma, and long-term skin health- [30:16 – 31:07] – Why you need confidence that your injections are worth it- [31:07 – 33:04] – Starting doses, concentration, and why 300mg/mL may be a problem- [33:04 – 34:26] – Why creams and other forms of TRT lack accuracy & consistency- [34:26 – 37:29] – Interpreting labs: peak vs trough serum levels and real risk- [37:29 – 40:17] – Understanding IUs vs. units with GH, peptides, and more- [40:17 – 42:01] – Smart people still make dosing mistakes: how to prevent yours- [42:01 – 43:49] – Final PSA: be clear on syringe, concentration, needle size, and unitsLinks & Resources:https://coryfit.com/⁠Coaching: Let's Chat⁠https://calendly.com/coryfit-coaching/15min⁠Consults: Book a Call⁠https://calendly.com/coryfit-coaching/one-time-consultationFor more content, follow along:⁠Instagram⁠: https://www.instagram.com/cory_fit/⁠Patreon⁠: https://patreon.com/CoryFit?utm_medium=unknown&utm_source=join_link&utm_campaign=creatorshare_creator&utm_content=copyLink

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E. 133 Avoid These Common TRT Dosing Errors | Syringes, Units, and Concentration

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