What did @sam.b67 actually say?
Sam kept it simple. "This is my voice, 10 seconds after tea... two years now on Testosterone." That's the whole claim: after two years of testosterone therapy, this is what their voice sounds like now. There's no dosage mentioned, no miracle story, no before-and-after comparison in the clip itself. It's a documentation post, not a medical tutorial. That context matters a lot when we evaluate it.
Sam is 56 and has been on testosterone for two years, placing their transition start around age 54. That's relevant because age affects both the pace and ceiling of voice masculinization. The "10 seconds after tea" detail is a casual aside, not a medical claim, though we'll address whether hot beverages actually affect vocal quality in any meaningful way.
Does the science back this up?
Yes, broadly. Testosterone does cause voice deepening in transmasculine individuals, and two years is a reasonable timeline to show significant change. The evidence here is solid, not contested.
The mechanism is well-established: exogenous testosterone causes hypertrophy of the laryngeal cartilage and lengthening of the vocal folds, which lowers the fundamental frequency of the voice. A 2016 study by Azul et al. in the International Journal of Language and Communication Disorders found that most transmasculine people on testosterone experience measurable pitch lowering within the first few months, with changes continuing for up to two years or longer. A 2019 paper by Nygren et al. in Logopedics Phoniatrics Vocology confirmed that vocal fundamental frequency in trans men approximates cisgender male ranges within one to two years of testosterone therapy for most individuals, though outcomes vary considerably by individual anatomy and dosing protocol.
At age 56, voice changes may be somewhat slower or less dramatic than in younger users, but the research doesn't suggest they're absent. Older adults do have some reduced laryngeal plasticity, but testosterone-driven vocal fold changes aren't exclusively age-dependent.
What did they get wrong (or right)?
Mostly right, with one minor thing worth flagging. Sam got the timeline right, and the implicit claim that testosterone changes the voice over years of use is well-supported. Credit where it's due: this is one of the more honest, low-hype posts you'll see in this space.
The "10 seconds after tea" comment is the only eyebrow-raiser. It implies hot tea might be warming or improving the voice in some way. There is some evidence that warm liquids can temporarily lubricate or relax the vocal tract, but the effect is modest and short-lived. A 2010 study by Sandage et al. in the Journal of Voice found that warm water inhalation showed minor positive effects on vocal fold tissue, but drinking hot tea has no robust clinical evidence behind it as a voice enhancer. It's folk wisdom at best. Sam didn't make a big claim about it, so this isn't a serious error, just worth noting.
What Sam did not do, to their credit: claim testosterone will give everyone the same result, promise a specific vocal outcome, or suggest any dosing information. That restraint is genuinely rare on TikTok.
What should you actually know?
Testosterone-induced voice changes are real, permanent, and one of the most consistent effects of testosterone therapy in transmasculine individuals. But "consistent" doesn't mean "uniform." Results vary based on genetics, age at onset, dosing, and duration. Some people experience dramatic drops in fundamental frequency; others see modest changes.
Critically, voice changes from testosterone are largely irreversible. Once the vocal folds have thickened and the larynx has restructured, stopping testosterone does not reverse the pitch drop. This is different from many other effects of testosterone therapy. Anyone starting testosterone should understand this before beginning, not after.
For transmasculine people over 50 starting testosterone, the voice changes are still documented, but the research base is thinner. Most studies skew younger. A 2021 review by Ristori et al. in Endocrine Practice noted that older transmasculine individuals are underrepresented in voice outcome studies, which means clinicians are often extrapolating from younger cohorts. That's a gap worth acknowledging.
Voice training alongside testosterone is also worth knowing about. Speech-language pathologists who specialize in gender-affirming voice work can help individuals optimize resonance, articulation, and other non-pitch vocal qualities that testosterone doesn't change on its own.
Bottom line
Sam's post is a low-key, personal documentation of a real and well-documented physiological effect. The science supports the general claim. The tea comment is harmless but not evidence-based. If you're considering testosterone and curious about voice outcomes, this video reflects a plausible real-world result, but it's one data point, not a promise.