TRT Formulations Compared
Side-by-side comparison of every TRT delivery method — injections, gels, pellets, oral, nasal, and creams.
Injectable testosterone esters
Testosterone Cypionate (Depo-Testosterone): half-life ~8 days, most common in US, typically injected 1-2x/week. Testosterone Enanthate (Delatestryl): half-life ~7-8 days, most common in Europe/UK, nearly identical to cypionate in practice. Testosterone Propionate: half-life ~2-3 days, requires every-other-day injections, faster onset/clearance, less water retention, often used by those sensitive to E2 spikes. Sustanon 250: blend of four esters (propionate, phenylpropionate, isocaproate, decanoate), designed for every 3-4 week dosing but modern practice favors weekly, more common in UK/Europe. Testosterone Undecanoate injectable (Nebido/Aveed): half-life ~30-40 days, 4mL injection every 10-14 weeks given in clinic, very convenient but large injection volume and less flexibility.
Topical formulations
Testosterone Gel 1% (AndroGel, Testogel): applied daily to shoulders/arms/abdomen. Convenient, steady levels, but messy and transfer risk. Testosterone Gel 1.62%: more concentrated, less volume to apply. Axillary gel (Axiron): applied to underarms, less transfer risk but can cause skin irritation. Testosterone Cream (compounded): typically 20% concentration, applied to scrotum for highest absorption. Gaining popularity for high DHT conversion and good absorption. Nasal gel (Natesto): applied inside nostrils 2-3x daily. Rapid peaks and clearance, may preserve some natural function. Unique profile but requires frequent application. Patch (Androderm): worn on skin, changed daily. High rate of skin irritation (30-60% of users), declining in use. Buccal tablet (Striant): applied to gum twice daily. Uncommon, can cause gum irritation.
Oral and implant options
Oral Testosterone Undecanoate (Jatenzo, Kyzatrex, Tlando): newer formulations absorbed via lymphatic system, bypassing first-pass liver metabolism. Must be taken with food (fatty meal). Dosed twice daily. Convenient — no injections, no transfer risk. More expensive than injectables. Liver monitoring still recommended. Pellets (Testopel): 6-12 pellets implanted under skin (hip/buttock) every 3-6 months. Minor surgical procedure with local anesthetic. Very convenient once placed. Fixed dosing — can't easily adjust mid-cycle. Risk of extrusion, infection, or scarring at implant site. Some men report feeling 'peaks and troughs' as pellets dissolve unevenly.
Head-to-head comparison matrix
Injections: best value, most dosing flexibility, proven long-term safety, but requires needles and supplies. Daily injections vs weekly: more stability vs convenience. Gels: needle-free, natural daily rhythm, but transfer risk, daily routine, inconsistent absorption. Creams: high absorption (scrotal), good DHT conversion, but compounded quality varies. Pellets: most convenient (set and forget), but surgical, fixed dose. Oral: no needles or skin application, but expensive, must take with food, newer (less long-term data). Nasal: unique rapid-action profile, may preserve axis, but frequent application, nasal irritation. The best formulation is the one you'll actually use consistently. Poor adherence to any method is worse than a less ideal method used diligently.
Frequently asked questions
Which TRT formulation is most effective? +
Injectable testosterone is the gold standard — most reliable absorption, most dosing flexibility, best value, and most data supporting long-term safety. Gels and creams work well for many men but absorption varies significantly between individuals. Pellets are effective but inflexible. Orals are newer but showing good results. All can work — adherence matters more than the specific form.
Is scrotal cream better than gel? +
Scrotal cream typically achieves higher absorption and DHT levels than standard gels due to the thin, highly vascular skin. Many men report better results with cream. However, cream is compounded (quality control varies), and the high DHT conversion may accelerate hair loss in predisposed men. Both are valid options.
Can I switch between formulations? +
Yes. Switching requires re-titration (finding your dose on the new formulation). Allow 6-8 weeks on the new form, get labs, and adjust. Switching from injections to gel may require starting the gel before your last injection clears to avoid a low-T gap. Work with your doctor on the transition.