The Two Most Popular TRT Methods, Compared
For most men starting TRT, the decision comes down to injections or gel. Both are effective — the right choice depends on your lifestyle, preferences, and how your body responds.
Testosterone Injections
How They Work
Testosterone cypionate (the most common formulation) is injected intramuscularly or subcutaneously, typically once or twice per week. The testosterone is suspended in oil and slowly absorbed from the injection site over several days.
Advantages
Most reliable absorption — you know exactly how much enters your system. Lowest cost per dose. No transfer risk to partners or children. Precise dose adjustments are easy. Once-weekly dosing fits most schedules. Most clinical data supports injectable protocols.
Considerations
Requires self-injection (most patients master this quickly with training). Can cause mild fluctuations between peak and trough levels, though frequent micro-dosing minimizes this. Some men experience mild soreness at the injection site.
Testosterone Gel
How It Works
Testosterone gel is applied daily to clean, dry skin (usually shoulders or upper arms). The testosterone absorbs through the skin into the bloodstream, providing steady hormone levels throughout the day.
Advantages
No needles — applied topically. Steady-state levels without the peaks and troughs of injections. Simple daily application that becomes routine.
Considerations
Transfer risk is the biggest concern — testosterone can transfer to partners or children through skin contact. Application sites must be covered or washed before contact with others. Absorption varies between individuals (some men absorb poorly). Significantly more expensive than injections. Must be applied at the same time daily.
The Bottom Line
Injections are the gold standard for a reason: reliable absorption, lowest cost, no transfer risk, and the most clinical data. Gel is a good alternative for men who truly cannot tolerate injections. At Heyday, most patients choose injectable testosterone cypionate 200mg/mL with excellent results.