What did @ellievanam actually say?
Almost nothing, technically. The entire transcript is two lines: "Hi, I'm Ellie and I'm one day on testosterone" and "Hey, I'm Ellie and I'm two years on testosterone." The video's actual content is visual, not verbal. The caption does the heavy lifting here, calling lip dryness "a lesser known side effect of T." So the claim being fact-checked is really the caption plus whatever physical change viewers are meant to observe between the two timestamps.
This matters because 5.1 million people are drawing a medical inference from a time-lapse comparison, not from any explained mechanism. The implicit claim is: testosterone caused noticeable lip changes over two years. That's worth examining seriously, even if Ellie never spelled it out.
Does the science back this up?
Yes, actually, more than most people realize. Skin and mucosal dryness is a documented, physiologically plausible effect of exogenous testosterone in people assigned female at birth. The evidence is real, if not always prominently discussed in mainstream HRT literature.
Testosterone influences sebaceous gland activity and alters the skin's lipid barrier. A 2017 study by Wierckx et al. in Andrology documented skin changes including increased sebum production in trans men on testosterone, but the same hormonal shifts that increase oiliness in facial skin can paradoxically reduce moisture retention in mucosal tissues, including lips. Estrogen plays a known role in maintaining mucosal hydration. Suppressing endogenous estrogen through testosterone therapy removes that protective effect. Giltay and Gooren (2000) in Journal of Clinical Endocrinology and Metabolism documented multiple integumentary changes in trans men on long-term testosterone, including skin texture differences consistent with reduced estrogenic support. Lip dryness specifically is less studied in isolation, but the mechanism is biologically coherent.
What did they get wrong (or right)?
They got the core observation right. Lip dryness is a real and underreported side effect of testosterone therapy, particularly in trans masculine individuals whose baseline estrogen levels drop significantly. Credit where it's due: most clinical consent discussions for testosterone therapy focus on voice changes, clitoral growth, and menstrual cessation. Mucosal dryness, including lips, eyes, and vaginal tissue, gets far less airtime despite being genuinely bothersome for many patients.
What's missing is any nuance about mechanism or variation. Not everyone on testosterone experiences significant lip dryness. Dosing, route of administration, individual estrogen suppression levels, and baseline skin type all matter. Framing it as a universal "side effect of T" without context could lead viewers to expect something that may not apply to them, or worse, to dismiss lip dryness as inevitable rather than something worth discussing with a prescriber. The chapstick hashtag is charming, but lip balm isn't the only tool here.
What should you actually know?
If you're on testosterone and experiencing dry lips, cracked skin, or vaginal dryness, these are worth raising with your provider. They're not dangerous, but they're also not something you just have to live with. Several options exist depending on severity and individual health profile, including topical moisturizers, adjusting hydration habits, and in some cases discussing whether estrogen levels warrant monitoring.
Vaginal atrophy and dryness in trans men on testosterone is perhaps the most clinically significant version of this broader mucosal issue, and it's systematically underreported. A 2019 study by Grimstad et al. in Journal of Pediatric and Adolescent Gynecology found that many trans masculine patients on testosterone experienced vaginal atrophy symptoms but did not disclose them to providers. The lip dryness Ellie documents is the visible tip of a broader mucosal dryness pattern that deserves more clinical attention than it gets.
- Lip and skin dryness on testosterone is mechanistically linked to reduced estrogenic support of mucosal tissue.
- It varies significantly by individual and is not universal.
- Symptoms like this are worth discussing with a prescriber, not just managing with chapstick alone.
- Vaginal dryness is a more serious version of the same phenomenon and is underreported in trans masculine patients.