TikTok creator shares Tostran gel experience, here's the science

What did @imajacobcracker actually say?

Honestly? Almost nothing medically specific. The transcript appears to be song lyrics, likely Paloma Faith based on the caption hashtag, playing over footage of the creator. The one substantive claim is buried in the caption, not the spoken content: the creator is using Tostran gel for TRT and says "everyone's transition is different." That's the entire medical claim on the table. Everything else is a dance and a vibe.

This matters because fact-checking a TikTok where the clinical content lives in a caption rather than the spoken word is frustrating but not uncommon. What we can assess is the implicit claim: that Tostran gel is a legitimate TRT option, that individual responses vary, and that sharing personal experience has value. Those are the things worth examining.

Does the science back this up?

On the variability point, yes, fully. Inter-individual variation in testosterone gel absorption is one of the more robustly documented phenomena in endocrinology. The short answer is that skin matters enormously, and two people applying the same dose get meaningfully different serum levels.

Tostran is a 2% testosterone gel licensed in the UK and several EU countries. A pharmacokinetic study by Wang et al. (2004, Journal of Clinical Endocrinology and Metabolism) established that transdermal testosterone produces significant variability in serum T levels between patients, with some individuals absorbing far less than expected. A later analysis by Bhasin et al. (2010, Journal of Clinical Endocrinology and Metabolism) confirmed that factors including application site, skin hydration, body hair density, and scrotal versus non-scrotal application all shift absorption meaningfully. So "everyone's transition is different" is not just a feel-good disclaimer, it is pharmacologically accurate.

What did they get wrong (or right)?

They got the core message right. Individual variation in TRT response is real and frequently underappreciated by patients who benchmark their progress against online forums or other users. The creator deserves credit for not making specific dosing claims, not promising outcomes, and framing this explicitly as personal experience.

What is absent is any meaningful clinical context. There is no mention of blood monitoring, no acknowledgment that absorption site matters, no reference to the transfer risk Tostran carries to partners or children through skin contact. The Endocrine Society's 2018 clinical practice guidelines (Bhasin et al., Journal of Clinical Endocrinology and Metabolism) explicitly flag secondary exposure as a patient education priority. That omission is not a lie, but it is a gap. Gel-based testosterone carries real secondary exposure risk, and a video reaching 8,800 people with no mention of this is a missed opportunity at minimum.

What should you actually know?

If you are considering or already using a testosterone gel like Tostran, a few things matter that this video does not cover.

• Absorption is genuinely unpredictable. Regular blood tests are not optional. Symptom tracking alone is not sufficient to assess whether your treatment is working or whether your levels are in a therapeutic range.
• Application site affects outcomes. Inner thigh application, which Tostran specifically licences, tends to produce different pharmacokinetics than upper arm or shoulder application used by other gel formulations. Study: Rogenfeld et al. (2011, European Journal of Endocrinology) found thigh application produced comparable but distinct absorption curves versus shoulder sites.
• Secondary transfer is a documented safety concern. The FDA issued a black box warning on testosterone gels in 2009 specifically because of virilisation cases in children exposed through skin contact with treated adults. Wash hands, cover the application site, and do not allow partners or children to contact untreated skin.
• "Everyone's transition is different" is accurate but should not be used to delay investigating why treatment is not working. If you are not seeing expected results after three to six months of consistent use, that warrants clinical review, not more patience.

The bottom line

This video is essentially a personal update with a single accurate observation buried in the caption. The creator is not making dangerous claims. They are not prescribing doses, promising outcomes, or selling anything. The implicit message, that testosterone gel works differently for different people, is supported by the literature. The gaps are around secondary exposure and the necessity of monitoring, which are genuinely important and absent. As TRT content goes, this is benign. It is also thin on actual information.