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Compounded and commercial testosterone cypionate contain the same hormone at the same labeled strength. What changes is the oil it is dissolved in, the size of the vial, whether the FDA reviewed that specific product, and what it costs. For most men on TRT, the practical difference shows up in how the injection feels, not in the testosterone itself.
Men starting testosterone replacement often get handed a vial that does not look like the one their friend has. One says Depo-Testosterone and comes from a manufacturer. The other has a pharmacy label with a name they have never heard of. Here is what separates the two.
The same drug is in both vials
Testosterone cypionate is testosterone with a cypionate ester attached, a chemical tail that slows how fast your body releases the hormone and is why the shot lasts about a week instead of a day. That molecule is identical no matter who puts it in the vial. A compounding pharmacy starts from the same USP-grade testosterone cypionate that goes into the commercial product.
Strength works the same way. A vial labeled 200 mg/mL gives you 200 mg of testosterone cypionate in every milliliter, whether a manufacturer filled it or a pharmacist did. If your dose is 100 mg weekly, that is half a milliliter from either source.
Potency is settled, then. The comparison lives in everything else: the oil, the vial, and the oversight behind the label.
What actually differs
The carrier oil
Testosterone cypionate does not dissolve in water, so it has to ride in oil. Depo-Testosterone uses cottonseed oil: 736 mg per mL in the 100 mg/mL strength and 560 mg per mL in the 200 mg/mL strength, with benzyl benzoate to help the hormone dissolve and benzyl alcohol as a preservative.
Cottonseed oil is thick. Thick oil draws into a syringe slowly and needs a wider needle to push through, which is a large part of why some men remember TRT injections as unpleasant. Compounding pharmacies frequently use a thinner oil instead, often grapeseed, sesame, or MCT. A thinner oil loads faster, passes through a fine needle, and makes small subcutaneous injections practical for men who would rather not go into muscle every week.
That is the single most common reason a clinic writes for a compounded preparation, and it has nothing to do with the strength of the medication.
The concentration and the vial
Commercial cypionate comes in fixed presentations: 100 mg/mL in a 10 mL vial, and 200 mg/mL in either a 1 mL or a 10 mL vial. A compounding pharmacy can prepare other concentrations and vial sizes, which is useful when a dose sits awkwardly between the standard ones or when a small weekly volume would leave a 10 mL vial open for months.
The review behind the label
This is the real regulatory gap between the two. Depo-Testosterone went through the FDA approval process. Compounded preparations did not. The FDA says it directly: compounded drugs are not FDA-approved, and the agency does not verify their safety, effectiveness, or quality before they are marketed.
What replaces that review depends on the pharmacy. A 503A pharmacy compounds against individual patient prescriptions under state board oversight. A 503B outsourcing facility registers with the FDA, follows current good manufacturing practice requirements, and gets inspected on a risk-based schedule. Both are legitimate. They are not the same level of scrutiny, and it is fair to ask which kind of pharmacy is filling your prescription.
Price and availability
Cost runs in both directions depending on your insurance and the pharmacy, so the useful move is to price your actual prescription rather than assume. Supply matters too. Commercial testosterone has gone through periods of tight availability, and compounding is one of the ways clinics keep men on treatment when a manufactured product is hard to get.
Which one fits you
Most men do well on either, which is why the decision usually turns on practical details rather than on principle.
- You want the FDA-reviewed product. Commercial cypionate is the straightforward answer, and there is nothing wrong with preferring it.
- Injections have been the hard part. A thinner compounded oil through a fine needle is a meaningfully different experience, and it is worth raising with your clinician.
- You inject subcutaneously. Thin oils suit that route better. Note that the commercial label is written for intramuscular use, so subcutaneous dosing is an off-label decision your prescriber makes with you.
- Your dose does not divide neatly. A custom concentration can turn an awkward measurement into a clean one.
- Cost or supply is the obstacle. Ask your clinic to price both through the pharmacy they actually use.
The one reason that should never drive the choice is a belief that one vial holds a stronger or purer hormone. Read more about how the two categories are regulated in our guide to compounded and brand-name testosterone, or see how testosterone replacement therapy works from labs through your first dose.
What to ask before you accept either one
The questions below apply to any TRT clinic, and a clinic that answers them plainly is telling you something useful about how it operates.
- Which pharmacy fills this, and is it a 503A pharmacy or a 503B outsourcing facility? You should get a name, not a shrug.
- What is the carrier oil and the concentration? Both belong on the label, and both affect how the injection goes.
- Why this preparation for me? There should be a clinical or practical reason, such as needle comfort, route, dose, or supply.
- What labs did you draw, and what will you recheck? Testosterone, hematocrit, and a follow-up level are the baseline. Any clinic prescribing without labs is skipping the part that keeps you safe.
- Is there a licensed clinician I can reach? Testosterone is a Schedule III controlled substance, and it needs real prescriber oversight.
Get medical care promptly for chest pain, shortness of breath, or swelling and pain in one leg, which can signal a clot. Tell your clinician about redness, swelling, or increasing pain at an injection site, and stop and seek care for signs of an allergic reaction such as hives or trouble breathing. TRT is not appropriate during attempts to conceive, and men with prostate or breast cancer, untreated sleep apnea, or a high red blood cell count need those addressed before starting. Testosterone bought without a prescription should not be used at all, whatever the label claims.