Carrier oils in testosterone replacement therapy (TRT) are used to dissolve testosterone esters. But which one is better for TRT injections, and why does it matter? The bodybuilding season of 2026 is going to be one of the most thrilling ever, with competitions held worldwide and opportunities for both open and masters competitors. Some reports suggest that MCT oil is generally well-absorbed and is a high-quality carrier oil often used by reputable pharmaceutical companies. You should consult your health care professional before taking any drug, changing your diet, or commencing or discontinuing any course of treatment. The above information is intended to supplement, not substitute for, the expertise and judgment of your health care professional. Do not flush medications down the toilet or pour them into a drain unless instructed to do so. Drug interactions may change how your medications work or increase your risk for serious side effects. Older adults may be more sensitive to the side effects of this drug, especially prostate/liver problems, swelling of arms/legs. Children may be more sensitive to the side effects of this drug. Call your doctor for medical advice about side effects.