Short answer
Injectable testosterone is dissolved in a carrier oil, which is listed on your vial label.
Injectable testosterone is dissolved in a carrier oil. The oil used is listed on your vial label.
True sensitivities to carrier oils are rare. Redness, warmth or soreness at the injection site is usually not an oil allergy.
If you have a rash beyond the injection site, hives, swelling or trouble breathing, call 911 or go to the nearest emergency room, then let us know.