Is testosterone of 338 ng/dl as a 24 year old male bad?

A testosterone level of 338 ng/dL is near the lower end of the broad reference range discussed (about 300–1,200 ng/dL), but the number alone doesn’t establish that it is a problem or that you need treatment. Symptoms and clinical assessment matter, and testosterone varies between individuals. 1 2

• Factors that can affect levels: Sleep, exercise and nutrition are relevant lifestyle considerations; genetics also contributes to individual variation. 3 4
• Symptoms: Low energy and low libido can be associated with low testosterone, but they can also have other causes, so they don’t confirm low testosterone on their own. 5 6
• Testosterone therapy and fertility: Exogenous testosterone can markedly reduce sperm production and fertility; therapy can also affect hormonal balance, so it warrants medical supervision and discussion of reproductive plans. 7