Testosterone Dosage Explained: Is 1 mL Per Week Right for You?

Estimated Reading Time: 5 minutes

Published on: 24 Feb 2026

TL;DR

1 mL isn’t a standard TRT dose. The real dose depends on the vial concentration (mg/mL). Most men start around 100 mg/week, adjust based on labs and symptoms, and may split injections for steadier levels. Women need much lower doses (about 5–10 mg/week).

Testosterone replacement therapy (TRT) doses vary from person to person. The right amount depends on factors such as the strength of the medication, where hormone levels started, what the treatment aims to improve, and how the body responds as therapy continues.
To figure out if 1 mL per week is the right dose, you have to look at the concentration.
Most men begin therapy at around 100 mg per week, based on clinical guidance. So whether 1 mL is appropriate depends entirely on what’s in the vial and how the individual responds during treatment.

How Testosterone Dosage is Determined

In testosterone therapy, it’s the amount of testosterone (in milligrams) that matters—not just how much fluid is injected.

1. Dose vs. Volume:

Not all testosterone injections are the same.

For example, testosterone cypionate often comes in a strength of 200 mg per mL. In that case, a 1 mL shot contains 200 mg of testosterone. If the vial says 100 mg per mL, then 1 mL gives you 100 mg.

2. Starting Dose:

Most men begin TRT with about 100 mg a week. Depending on how concentrated the solution is, that works out to somewhere between 0.5 and 1 mL per dose.

For long-term therapy, some men continue with 100 mg each week, while others move to 200 mg every two weeks to maintain stable levels.

3. Injection Timing:

Breaking up the weekly dose into two smaller injections can help keep hormone levels more even. Rather than one larger shot, many doctors recommend splitting the dose—typically 50 to 100 mg twice a week—to reduce the highs and lows that can happen with less frequent dosing.

4. Ongoing Monitoring:

After starting treatment, blood work is done regularly to make sure testosterone stays in the right range. Most aim for levels between 300 and 1000 ng/dL, with a preferred target somewhere around 400 to 700.

5. Individualized Approach:

Testosterone dosing is adjusted over time. It depends on how someone feels, what their lab results show, and what they’re hoping to achieve with treatment.

testosterone-dosage

Is 1 mL Per Week Enough? It Depends on the Individual

The right testosterone dose is highly personal. The adequacy of a 1 mL weekly dose depends on several important factors.

Concentration Matters: The number on the vial makes all the difference. One milliliter could contain either 100 mg or 200 mg of testosterone, depending on the formula. So, if the goal is 100 mg a week and the vial says 200 mg/mL, just half a milliliter would be enough.

Body Size and Metabolic Rate: Men with broader builds or higher muscle mass often need more testosterone to maintain balanced levels. In contrast, those with leaner builds or lower activity levels may respond well to a lower dose like 100 mg per week.

Age and Baseline Hormone Levels: Testosterone levels naturally decline by about 1.6 % each year after the age of 40. Men starting therapy with very low baseline levels may need a higher dose to reach a healthy range. By age 70, approximately 30 percent of men experience clinically low testosterone.

Symptoms and Treatment Goals: Testosterone therapy is usually adjusted based on symptoms such as energy, muscle strength, and mood. The goal is to find a dose that helps with things like energy, mood, and strength—without pushing testosterone levels too high.

Adjusting the Dose: Most people start at 100 mg a week. With a 200 mg/mL vial, that’s just half a milliliter. After a few weeks, your doctor will review your bloodwork and check in on how you're doing. If things still feel off, the dose can go up. If side effects show up, it might need to come down.

Special Considerations for Women

Testosterone therapy works very differently for women than it does for men. Women only need a small fraction of the dose—usually around 5 to 10 mg per week—to feel the benefits. Giving a full 1 mL of a standard male dose would be far too much and could lead to side effects.

Studies show that low-dose testosterone can support sexual health in women, especially those who are postmenopausal and dealing with low desire (known as hypoactive sexual desire disorder). For women, treatment needs to be carefully tailored, using much lower concentrations and close monitoring to keep levels within a safe and natural range.

Key Takeaways

1 mL doesn’t mean the same for everyone. The actual dose depends on the concentration of the testosterone. Some vials contain 100 mg/mL, others 200 mg/mL—so the total amount varies.

Most men start around 100 mg per week. That’s a general starting point, but the dose often changes based on how your body responds and what your bloodwork shows.

Smaller, more frequent injections can help. Splitting your weekly dose into two shots may keep hormone levels steadier and reduce the chance of side effects.

Stay on top of your labs. Routine testing helps make sure your testosterone levels don’t drift too low or too high. The healthy range for most men is 300-1000 ng/dL.

There’s no one-size-fits-all. Your ideal dose depends on things like body size, metabolism, age, and how you’re feeling.

Women require far less. Women usually need only 5 to 10 mg per week, and the dosing must be monitored closely to avoid unwanted effects.

Your dose should fit your life. The best results come from a plan that fits your body, your routine, and how you feel—not just the numbers on a chart.

Disclaimer: The statements on this website have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease.

Frequently Asked Questions

Q1. Is 1 mL of testosterone always the right dose?

Not really. It depends on how concentrated the testosterone is in the vial—some contain 100 mg/mL, others 200 mg/mL. Plus, factors like your weight, age, and how your body processes hormones all play a role.

Q2. What’s a typical dose to start with?

Most guys begin around 100 mg a week. But that’s just a starting point. Your doctor will usually adjust the dose depending on how your body responds and what your lab work shows.

Q3. Why do people split their dose into smaller injections?

Doing two smaller shots a week instead of one big one helps avoid those up-and-down hormone swings. It keeps your levels more even and makes side effects less likely.

Q4. When should you get your blood tested after starting TRT?

Usually after a few weeks. That first round of bloodwork helps your provider see if the dose is doing its job—or if it needs a tweak.

References

Jayasena CN, Anderson RA, Llahana S, et al. Society for Endocrinology guidelines for testosterone replacement therapy in male hypogonadism. Clinical Endocrinology. 2021;96(2):200-219. doi:https://doi.org/10.1111/cen.14633

Bhasin S, Cunningham GR, Hayes FJ, et al. Testosterone Therapy in Adult Men with Androgen Deficiency Syndromes: An Endocrine Society Clinical Practice Guideline. The Journal of Clinical Endocrinology & Metabolism. 2006;91(6):1995-2010. doi:https://doi.org/10.1210/jc.2005-2847

Pinsky MR, Hellstrom WJG. Hypogonadism, ADAM, and hormone replacement. Therapeutic Advances in Urology. 2010;2(3):99-104. doi:https://doi.org/10.1177/1756287210369805

Sizar O, Schwartz J. Hypogonadism. PubMed. Published February 25, 2024. https://www.ncbi.nlm.nih.gov/books/NBK532933/

Uloko M, Rahman F, Puri LI, Rubin RS. The clinical management of testosterone replacement therapy in postmenopausal women with hypoactive sexual desire disorder: a review. International Journal of Impotence Research. 2022;34(7):635-641. doi:https://doi.org/10.1038/s41443-022-00613-0

Morley J. The benefits and risks of testosterone replacement therapy: a review. Therapeutics and Clinical Risk Management. Published online June 2009:427. doi:https://doi.org/10.2147/tcrm.s3025

Islam RM, Bell RJ, Green S, Page MJ, Davis SR. Safety and efficacy of testosterone for women: a systematic review and meta-analysis of randomised controlled trial data. The Lancet Diabetes & Endocrinology. 2019;7(10). doi:https://doi.org/10.1016/s2213-8587(19)30189-5