Should you fix metabolic issues before starting TRT?

What did @joshp_fnp actually say?

A family medicine practitioner in Omaha claimed he turned away two patients this week who wanted testosterone replacement therapy because starting TRT on top of uncontrolled diabetes, high blood pressure, thyroid dysfunction, or high cholesterol "isn't healthcare, it's negligence." He argued that comprehensive labs, a full health history, and a physical exam should come before any prescription, and that some men don't need TRT at all. They need "better sleep, weight loss, thyroid medication." His framing was explicit: he's a family medicine doctor first, a TRT prescriber second. That's not a small distinction.

The video is promotional, there's no question about that. It's an ad for ZYP Medical dressed up as a cautionary tale. But the clinical argument he's making is worth examining separately from the marketing wrapper around it.

Does the science back this up?

Largely, yes. The claim that uncontrolled comorbidities should be addressed before initiating TRT has real clinical support, though the picture is more nuanced than the video suggests.

On cardiovascular risk: the 2023 TRAVERSE trial (Lincoff et al., New England Journal of Medicine) was the largest randomized controlled trial on testosterone and cardiovascular outcomes. It found testosterone was non-inferior to placebo for major adverse cardiac events in men with hypogonadism and high cardiovascular risk. However, it also flagged elevated rates of atrial fibrillation, pulmonary embolism, and acute kidney injury in the testosterone group. Men with poorly controlled hypertension were among those at elevated baseline risk. Starting TRT without managing blood pressure first adds variables no responsible clinician should ignore.

On diabetes: testosterone does have a complex bidirectional relationship with insulin sensitivity. A meta-analysis by Grossmann et al. (2015, European Journal of Endocrinology) found testosterone therapy modestly improved glycemic control in hypogonadal men with type 2 diabetes, but the authors noted that poorly controlled diabetes itself can suppress testosterone, creating a chicken-and-egg problem that requires addressing glucose control first.

On thyroid: hypothyroidism can directly suppress sex hormone-binding globulin and mimic low-T symptoms including fatigue, low libido, and cognitive fog. The claim that thyroid issues can explain symptoms "you might think are low testosterone" is clinically accurate and often overlooked at pill-mill-style hormone clinics.

What did they get wrong or right?

He got the core clinical argument right. The problem is what he left out.

The video implies that TRT is safe once those conditions are "stable," but stable doesn't mean gone. Men with well-controlled hypertension or managed type 2 diabetes still carry elevated baseline risk for some of TRT's known adverse effects, including erythrocytosis (elevated red blood cell mass), which can worsen cardiovascular risk independent of blood pressure. The Endocrine Society's 2018 clinical practice guidelines specifically flag hematocrit monitoring as mandatory during TRT, but that nuance doesn't make it into the video.

He's also silent on fertility. TRT suppresses the hypothalamic-pituitary-gonadal axis and dramatically reduces sperm production. For any man who might want biological children, that's not a footnote. It's a central part of informed consent, and a clinician who calls out other clinics for negligence should probably mention it.

Credit where it's due: recommending "comprehensive labs, not just testosterone" is genuinely good advice that many direct-to-consumer hormone platforms skip entirely.

What should you actually know?

If you're a man with symptoms you think might be low testosterone, here's what the evidence actually supports.

• Low testosterone is a diagnosis that requires two fasting morning total testosterone measurements below the normal range, not just symptoms. Symptoms overlap heavily with sleep apnea, depression, hypothyroidism, and obesity.
• The TRAVERSE trial (2023) provides some reassurance on cardiac safety for men with pre-existing cardiovascular disease, but it also revealed real risks that weren't visible in smaller studies. This is not a drug to start casually.
• Erythrocytosis is the most common adverse effect of TRT and can increase clotting risk. Hematocrit should be monitored at 3-6 months after initiation and periodically thereafter (Endocrine Society, 2018).
• Lifestyle interventions work. A 2013 study by Grossmann (Journal of Sexual Medicine) found that weight loss of 10% or more increased testosterone levels by up to 50% in obese hypogonadal men. Sleep optimization and resistance training also have documented effects on endogenous testosterone.
• Any clinic that prescribes testosterone without checking a full metabolic panel, CBC, PSA (in men over 40), and thyroid function is cutting corners. That's not a high bar. It's the minimum.

Bottom line

This video is promotional content, and you should weigh it accordingly. But the clinical position it argues, that uncontrolled systemic disease should be addressed before adding TRT, is defensible and supported by current evidence. The gaps in the video, no mention of fertility impact, no discussion of erythrocytosis monitoring, no acknowledgment that "stable" conditions still carry residual risk, are meaningful. A good TRT clinic does what this doctor describes. A great one also tells you the things he left out.