Testosterone replacement therapy is not a single product. It's a treatment that arrives through several very different routes, and the route you and your doctor choose shapes almost everything about the experience, from what you pay each month to how steady you feel between doses. This guide walks through the four main delivery methods used today, how each one works, and the real tradeoffs that separate them.
Why the Delivery Method Matters More Than People Expect
When most men picture TRT, they picture a shot. But the same hormone can reach your bloodstream as an injection, a cream rubbed on the skin, a small pellet placed under the skin, or a gel pushed into the nose. Each path delivers testosterone at a different speed and rhythm.
That rhythm is the whole story. Some methods produce sharp peaks and slow declines. Others hold levels flat and even. Some let your doctor fine-tune your dose week to week. Others lock you into a fixed amount for months. And a few carry a risk that surprises people: the testosterone can rub off onto someone else.
The right choice depends on your budget, your tolerance for needles, whether young children or a partner share your home, your fertility plans, and how much day-to-day convenience matters to you. Major medical groups, including the Endocrine Society, stress that this should be a shared decision made with a clinician who is monitoring your blood work, not a guess made alone (Endocrine Society, 2018).
This guide describes how each method behaves. It does not provide doses, schedules, or any instructions you could use to treat yourself. TRT requires diagnosis, prescription, and ongoing lab monitoring under a licensed provider.
The Four Methods at a Glance
Before the deep dives, here is how the main options stack up across the factors men ask about most. Read each column as a general pattern, not a promise. Your own results depend on your body, your dose, and how closely your levels are tracked.
| Factor | Injections (cypionate / enanthate) | Cream / Gel (transdermal) | Pellets (implanted) | Nasal Gel |
|---|---|---|---|---|
| Typical cost | Lowest | Moderate to high | Moderate to high (procedure fees) | Higher |
| Dosing frequency | Weekly or more often | Daily | Every ~3 to 6 months | Multiple times per day |
| Level stability | Peaks and troughs (gentler if dosed more often or under the skin) | Steady, but can vary by absorption | Steady early, fades near the end | Short spikes through the day |
| How adjustable | Very flexible | Flexible | Fixed once placed | Flexible |
| Transference risk to others | None | Yes, a known concern | None after healing | Very low |
| Fertility suppression | Yes, like most TRT | Yes, like most TRT | Yes, like most TRT | May suppress less |
| Convenience | Self-managed, needles involved | Easy, but daily and timing-sensitive | Very convenient between visits | Needle-free, but frequent |
| Needles required | Yes | No | At placement only | No |
The sections below explain what sits behind each row.
Injections (Testosterone Cypionate and Enanthate)
Injectable testosterone esters, mainly cypionate and enanthate, are the oldest and most widely used form of TRT. They are oil-based and slowly release testosterone after the shot. The FDA-approved label for testosterone cypionate describes it as a long-acting ester given by injection for men with low testosterone (FDA, testosterone cypionate label).
How Injections Work
After an injection into muscle or the fatty layer under the skin, the ester is gradually broken down and testosterone enters the bloodstream over days. Levels rise to a peak, then drift down until the next dose. How sharp that peak-and-valley pattern feels depends a lot on how often the shots are given. Spreading the same weekly amount across more frequent, smaller injections tends to smooth the ride.
Intramuscular vs Subcutaneous
For decades, injections meant a deeper shot into a large muscle. More recently, subcutaneous injection, placed into the fatty tissue just under the skin with a small needle, has become common. Research and clinical experience suggest subcutaneous dosing can raise testosterone effectively and is easier and more comfortable for many men (PubMed: subcutaneous testosterone in hypogonadism). The smaller needle is a big reason some men who feared shots end up tolerating this route well.
The Tradeoffs
The headline advantage is cost. Injectable esters are usually the least expensive option, which matters because TRT is ongoing. They are also the most adjustable. Because the dose and timing are in your hands, a clinician can dial levels up or down in small steps based on your labs and symptoms.
The downsides are the needle itself and the up-and-down pattern in your hormone levels. Some men feel a dip in mood or energy as the next dose approaches, especially with less frequent shots. There is also a learning curve to self-injecting safely. None of the transference worry that comes with topical products applies here, which makes injections a clean choice for households with kids or a partner.
There is one more wrinkle worth knowing. Higher peaks from injections can drive more of your testosterone to convert into estrogen, which some men feel as bloating, moodiness, or breast tenderness. This is manageable and usually tied to dose and frequency, and it is something a prescriber watches through your labs. Our guide on estrogen management on TRT explains how clinicians handle it. Smoother dosing patterns, including subcutaneous shots given more often, tend to soften these swings.
To see how injection costs compare with other methods, our TRT cost calculator can help you estimate by method, and our guide on how much TRT costs breaks down the full picture including labs and visits.
Who Tends to Choose Injections
Injections suit men who want the lowest cost and the most control, and who are not deterred by needles. They work well for households with children or a partner, since there is no transference. Men who like to fine-tune their dose with their doctor, or who want the flexibility to shift their schedule, often land here. The main people who steer away are those with a genuine needle phobia or those who simply do not want a regular injection routine in their lives.
Creams and Gels (Transdermal Testosterone)
Transdermal testosterone comes as a gel or compounded cream applied to the skin once a day. The hormone passes through the skin and into the bloodstream over the following hours. Brand-name gels like AndroGel and Testim are FDA-approved, and compounded creams are also widely prescribed.
How Transdermals Work
You apply the product to clean, dry skin in the area your prescriber directs. The skin acts as a slow-release reservoir, so levels stay fairly steady through the day rather than spiking the way an injection can. This even delivery is the main appeal. No needles, no sharp peaks, just a daily routine.
The Transference Problem
Here is the catch that men often do not see coming. Testosterone on your skin can transfer to anyone who touches that area. The FDA requires a boxed warning on these products about exactly this risk. The boxed warning states that virilization has been reported in children secondarily exposed to testosterone gel and that children should avoid contact with unwashed or unclothed application sites (FDA AndroGel labeling, Drugs@FDA).
In practice, that means covering the area with clothing once the gel dries, washing your hands right after applying, and being careful with close contact, sleeping skin-to-skin, and young kids climbing into your lap. For a single person living alone, this is a minor housekeeping rule. For a father of toddlers, it can be a dealbreaker.
The Tradeoffs
Creams and gels are needle-free and deliver steady levels, which many men prefer. They are also adjustable, since your prescriber can change the daily amount. On the cost side, they usually land in the moderate-to-high range, more than injections but with the trade of skipping needles.
Beyond transference, the other limits are absorption and discipline. Skin absorbs testosterone differently from person to person, so two men using the same amount can end up with different blood levels. Things like sweating, showering too soon, or applying to the wrong spot can blunt the effect. And it has to be done every single day, on schedule, without fail. Skin irritation at the application site happens for some users too.
A quick word on where the cream goes. Some compounded creams are applied to areas other than the upper body, and prescribers have their own preferences based on absorption and transference risk. Whatever the spot, the same rule holds: it has to dry, stay covered, and stay off other people's skin. The discipline of a daily topical is easy to underestimate. Miss a day and your levels dip; double up to catch up and you can overshoot. Steady results come from a steady routine.
Who Tends to Choose Creams and Gels
Transdermals appeal to men who want needle-free, steady delivery and do not mind a daily habit. They suit people who live alone or can reliably keep the application area covered and away from kids and partners. The men who avoid them are usually those with young children at home, those whose skin absorbs poorly, or those who know they will not keep up a daily application without slipping.
Pellets (Implanted Testosterone)
Pellets are small, solid cylinders of testosterone placed just under the skin, usually in the hip or upper buttock area, during a brief in-office procedure. Once in place, they dissolve slowly and release hormone over the following months.
How Pellets Work
A clinician numbs a small area, makes a tiny incision, and inserts several pellets with a special tool. The site heals in a few days. From there, the pellets release testosterone steadily, providing a long stretch of coverage from a single visit. Studies of pellet therapy have measured this sustained release and reported symptom improvement over the months following placement (PubMed: testosterone pellet pharmacokinetics and outcomes, 2017).
The Tradeoffs
Convenience is the standout. After one procedure, many men go three to six months without thinking about their treatment, no daily cream, no weekly shot. There is also no transference risk once the small wound heals, which makes pellets attractive for families.
The major drawback is the flip side of that convenience: once the pellets are in, the dose cannot be changed. If your levels come back too high or too low, you cannot dial them back the way you can with an injection or cream. You either wait for the pellets to fade or, in some cases, have them removed, which is not always simple. Levels also tend to run higher soon after placement and taper toward the end of the cycle, so the steadiness is real but not perfectly flat across the whole window. The procedure itself carries small risks like infection, bruising, or a pellet working its way back out (extrusion), and it adds procedure fees to the cost. Because the dose is locked in, careful blood work and monitoring before and between placements matters even more with this method.
This is why many clinicians treat the first pellet cycle as a calibration. They start conservatively, watch how your body responds over the months, and adjust the amount placed at the next visit rather than during the current one. It is a slower feedback loop than injections or creams allow. If your needs are still changing, or you are new to TRT and your ideal dose is unknown, pellets ask you to commit before you have that answer.
Who Tends to Choose Pellets
Pellets fit men whose dose is already well established and stable, who value low day-to-day hassle, and who would rather visit the clinic a few times a year than manage treatment at home. The no-transference feature makes them family-friendly. The men who avoid pellets are those new to therapy who still need dose adjustments, those who dislike the idea of a minor procedure, and anyone whose levels tend to swing in ways that need quick correction.
Nasal Gel (Intranasal Testosterone)
Nasal testosterone gel, sold under the brand Natesto, is applied inside the nostrils. It is the newest of the common routes and works on a very different schedule from the others.
How Nasal Gel Works
You apply a small amount of gel into the nose several times a day. The hormone absorbs through the nasal lining and produces short, quick rises in testosterone that fade within hours, which is why it is dosed multiple times daily. The FDA-approved Natesto label describes this multiple-times-daily intranasal use (FDA Natesto label).
The Fertility Angle
Most forms of TRT lower the body's own signals to the testicles, which reduces sperm production and can impair fertility. Because nasal gel produces brief pulses rather than around-the-clock elevated levels, it may suppress the body's natural hormone signaling less than other routes. Research has looked at intranasal testosterone and its effects on sperm production, and it is sometimes discussed as a gentler option for men concerned about fertility (PubMed: intranasal testosterone and spermatogenesis). This is not a guarantee, and any man trying to preserve fertility on TRT should plan that carefully with a specialist. Our guide on TRT and fertility covers the options in more depth.
The Tradeoffs
Nasal gel is needle-free and carries essentially no transference risk to partners or children, since it goes inside your own nose. The possible fertility benefit is a real draw for younger men or those still hoping to have kids.
The cost is usually on the higher side, and the dosing demand is the biggest practical hurdle. Applying gel in your nose several times a day, every day, takes commitment and is easy to forget. Some users report nasal side effects like a runny nose, irritation, or discomfort. It also is not a fit for men with certain nasal or sinus conditions.
The frequency point deserves emphasis. A weekly injection asks for one moment of attention. A nasal gel asks for several, every single day, often at set times. For a man with a busy or unpredictable schedule, that is a lot of chances to slip. The same short-acting nature that may protect fertility is also what forces the repeat dosing. You cannot have one without the other.
Who Tends to Choose Nasal Gel
Nasal gel tends to attract younger men worried about fertility, men who want to avoid needles, and households where transference is a concern. It rewards people who are organized and consistent. The men who avoid it are those who do not want to dose multiple times a day, those with nasal or sinus problems, and anyone who knows a complex daily routine will not stick.
How to Think About Choosing
There is no single best method, only the best fit for your situation. A few questions tend to drive the decision.
Cost and Insurance
If budget is the main concern, injectable esters are typically the most affordable and the most flexible. Pellets, gels, and nasal gel cost more, and insurance coverage varies a lot by plan and by whether a product is brand-name or compounded. Running the numbers ahead of time avoids surprises, and our cost calculator is built for exactly that.
Your Household
If young children or a partner share close contact with you, transference risk pushes many men away from creams and gels and toward injections, pellets, or nasal gel. This is one of the most practical and overlooked factors in the whole decision.
How Tightly You Want Levels Tuned
If you and your doctor expect to adjust your dose based on labs and how you feel, injections and creams give you that control. Pellets do not, since the dose is fixed for the cycle. Men who want fine control over things like estrogen conversion, which we cover in our guide on estrogen management on TRT, often prefer adjustable methods.
Convenience vs Control
Pellets ask the least of you day to day but give you the least control. Injections and creams ask more of you but let you fine-tune. Nasal gel is needle-free but demands the most frequent dosing. Be honest about which kind of routine you will actually keep up with.
Fertility Plans
If keeping the door open to fatherhood matters, raise it early. Standard TRT suppresses fertility, and choices like nasal gel or adding other medications may change the picture. The American Urological Association and other bodies stress counseling men about fertility before starting treatment (AUA clinical guidelines).
Whatever you lean toward, the next step is finding a clinician who offers it and monitors you properly. You can compare providers by delivery method to see who does what.
Monitoring Is Non-Negotiable, Whatever You Choose
No matter which route you pick, TRT is not set-and-forget. Guidelines from the Endocrine Society call for checking testosterone levels and other markers like red blood cell count after starting and periodically afterward, because the goal is to bring you into a healthy range without going too high (Endocrine Society, 2018). Too much testosterone carries its own risks, and only blood work tells the real story. The delivery method changes the rhythm of your levels, which changes when and how your provider should test you. That is one more reason the choice of method and the choice of provider go hand in hand.
Frequently Asked Questions
Which TRT delivery method is the cheapest?
Injectable testosterone esters, mainly cypionate and enanthate, are usually the least expensive option and tend to offer the most flexibility in dosing. Creams, gels, pellets, and nasal gel generally cost more, though your final price depends heavily on insurance, whether the product is brand-name or compounded, and any procedure fees. Use a cost calculator and confirm coverage with your plan before deciding.
Can testosterone really transfer to my family?
Yes, with creams and gels this is a documented risk. The FDA requires a boxed warning because testosterone on your skin can rub off onto others, and exposure has caused unexpected sexual development in children. Covering the area after the gel dries and washing your hands helps, but men with young kids or close partner contact often choose injections, pellets, or nasal gel to avoid the worry entirely.
Do pellets let me adjust my dose if my levels are off?
No, and that is the main downside of pellets. Once they are placed under the skin, the dose is fixed until they dissolve over the following months. If your blood levels come back too high or too low, you generally cannot fine-tune them mid-cycle the way you can with injections or creams. Removal is possible in some cases but is not always simple, which makes careful lab monitoring especially important with pellets.
Is any TRT method better for fertility?
Most TRT suppresses the body's own hormone signals and reduces sperm production. Nasal gel, because it creates brief pulses rather than steady elevated levels, may suppress fertility less than other routes, and it is sometimes discussed as a gentler choice for that reason. It is not a guarantee, though. Any man who wants to preserve fertility should plan that explicitly with a specialist before starting treatment.
How do I pick the right method for me?
Weigh five things: cost, whether young children or a partner share close contact with you, how tightly you want your levels adjusted, how much daily effort you will realistically keep up with, and your fertility plans. There is no universal best choice. The right answer comes from a shared decision with a clinician who diagnoses you properly, prescribes the method that fits your life, and monitors your blood work over time.
This article is for educational purposes only and is not medical advice. Testosterone replacement therapy requires diagnosis, prescription, and ongoing monitoring by a licensed healthcare provider.
-- The TRT Atlas Team