@claremorrow_ifbbpro's hormone claims need more context

What did @claremorrow_ifbbpro actually say?

Clare Morrow, an IFBB pro, claims that testosterone is "one of the most effective and natural things" for fat loss, that it declines with age in both men and women, and that "the only way to increase it is to get your hormones checked with a wellness doctor." She also plugs a specific telemedicine provider in the comments.

To her credit, she keeps it personal and doesn't hand out doses or protocols. But the phrase "the only way to increase it" is doing a lot of heavy lifting here, and it needs examination. The claim that testosterone is essentially a universal fat-loss hormone that everyone over 40 should chase is a significant oversimplification, and the referral to a specific unnamed "wellness doctor" raises some flags worth talking about.

Does the science back this up?

Partially. Testosterone does decline with age, and low levels are associated with increased fat mass. But the relationship is more complicated than a simple cause-and-effect story.

For men, testosterone levels decline roughly 1-2% per year after age 30, not suddenly at 40 (Harman et al., 2001, Journal of Clinical Endocrinology and Metabolism). Clinical hypogonadism, defined as consistently low serum testosterone with symptoms, affects an estimated 2-6% of men, not the broad swath of anyone who feels tired and carries belly fat.

For women, the picture is even murkier. Testosterone does fall across the reproductive lifespan, but the clinical evidence linking low testosterone specifically to weight gain in perimenopausal women is much weaker than the video implies. A 2019 systematic review by Islam et al. in the journal Maturitas found that while testosterone therapy in women showed modest benefits for sexual function, the evidence for fat loss specifically was limited and inconsistent.

The broader claim that testosterone is "nature's natural fat burner" borrows from legitimate physiology but packages it into something closer to marketing language than clinical reality.

What did they get wrong (or right)?

She got the basic biology roughly right. Testosterone does support lean muscle mass, and more muscle generally means a higher resting metabolic rate, which can aid fat loss over time. The age-related decline is real. Symptoms like low energy, decreased muscle, and weight gain can genuinely be connected to hormonal shifts.

Where this goes sideways is the framing. Saying testosterone "decreases greatly over age 40" for both men and women flattens a lot of individual variation. And the line that getting hormones checked with a wellness doctor is "the only way to increase it" ignores well-documented lifestyle interventions. Resistance training, sleep optimization, and body fat reduction all have evidence supporting modest testosterone improvements (Leproult and Van Cauter, 2011, JAMA; Kumagai et al., 2016, European Journal of Applied Physiology). These aren't cure-alls, but calling them irrelevant is wrong.

The referral to a specific unnamed telemedicine provider in the comments, with no disclosed commercial relationship, is worth flagging. That is a referral arrangement, not a wellness tip.

What should you actually know?

If you're experiencing unexplained weight gain, fatigue, and loss of muscle in your 40s, getting bloodwork done is genuinely reasonable advice. A full hormone panel, including total and free testosterone, SHBG, LH, FSH, and for women estradiol and progesterone, gives your provider something to actually work with. That part of the message is defensible.

But testosterone replacement therapy is not a weight loss treatment. The FDA has not approved testosterone for fat loss in men or women. In men, TRT is approved for documented hypogonadism. In women, no testosterone product is currently FDA-approved at all, meaning any prescribing is off-label. A 2023 clinical review in the New England Journal of Medicine (Bhasin et al.) reinforced that TRT in men with age-related decline but without clinical hypogonadism showed modest benefits that have to be weighed against real risks, including erythrocytosis, cardiovascular considerations, and suppression of natural production.

The bottom line: low testosterone can be a real clinical issue worth treating. It is not, however, a straightforward fat-burning switch that anyone feeling sluggish after 40 should rush to activate through a telemedicine referral in an Instagram comment section.