Testosterone cream (and gel) is the second most common TRT delivery method after injectable cypionate. For men who can't or won't inject, topical testosterone offers a needle-free alternative. But topical TRT has its own set of considerations — absorption variability, transfer risk, and application technique all influence whether the therapy works as intended.
How Topical Testosterone Works
Testosterone cream or gel is applied to the skin, where it absorbs through the stratum corneum into the dermis and then into the systemic circulation. Absorption occurs over 2–6 hours, producing a gradual rise in testosterone that roughly mimics the natural diurnal pattern (higher in the morning, declining through the day) when applied in the morning.
Key pharmacokinetic differences from injectable:
- Daily application required: Topical testosterone must be applied every day. Missing a day produces a noticeable testosterone dip.
- Absorption variability: Skin thickness, body hair, sweating, and skin hydration all affect how much testosterone is absorbed. Published data shows absorption rates ranging from 9–14% of the applied dose — meaning 86–91% of the testosterone in the cream doesn't enter your body.
- DHT conversion: Topical testosterone produces higher DHT levels than injectable at equivalent systemic testosterone levels. The skin contains high concentrations of 5-alpha-reductase, converting testosterone to DHT locally before systemic absorption. This is relevant for hair loss (more DHT) and prostate considerations.
The Transfer Risk
This is the most clinically significant safety concern unique to topical testosterone. Testosterone cream or gel on your skin can transfer to other people through direct skin-to-skin contact. Women and children are particularly vulnerable — transferred testosterone can cause virilization symptoms (acne, hair growth, voice deepening, clitoral enlargement in women; premature puberty in children).
FDA black-box warnings on all topical testosterone products address this risk specifically. Required precautions:
- Apply to skin that will be covered by clothing — not hands, arms, or other commonly touched areas
- Wash hands immediately after application with soap and water
- Cover the application site with clothing after the cream has dried (typically 2–4 hours)
- Wash the application site before anticipated skin-to-skin contact with partners or children
- Preferred application sites: Inner thighs, shoulders/upper arms (covered by shirt), or scrotal application (for specific compounded formulations)
Scrotal application: Some compounded testosterone cream protocols specify scrotal application, which produces higher DHT levels due to the scrotal skin's high 5-alpha-reductase activity. This is an intentional protocol choice for men who want elevated DHT (some clinicians believe scrotal DHT improves libido and sexual function). The transfer risk is lower for scrotal application because the area is typically covered — but the DHT elevation requires monitoring.
Optimizing Absorption
Application Best Practices
- Apply to clean, dry skin — shower first, dry completely
- Rotate sites: Alternate between 4–6 sites (inner thighs, shoulders, upper arms) to prevent local skin irritation
- Don't apply to broken skin, sunburned areas, or areas with heavy body hair (hair reduces absorption)
- Allow 2–4 hours before showering, swimming, or heavy sweating after application
- Apply at the same time daily — morning application best mimics natural diurnal rhythm
- Don't apply sunscreen or lotion to the same area — these can impair absorption
The Bottom Line
Effective If Managed Carefully
Testosterone cream delivers adequate T levels for many men without needles. The trade-offs — daily application, absorption variability, transfer risk, and higher DHT — are manageable with proper technique and awareness. For men who are needle-averse, topical TRT is a legitimate and effective alternative. But it requires more daily attention than the "inject and forget for a week" convenience of injectable cypionate.