Low sex drive is one of the most common sexual health concerns, and it rarely has a single cause. Among women alone, roughly 25 to 40 percent of those between ages 30 and 59 report low sexual desire, with that number climbing to about 60 percent after age 60. The numbers for men are lower but still significant. Whether your drop in desire happened gradually or seemingly overnight, there’s almost always an identifiable reason, and usually something you can do about it.
What Counts as “Low”
Sexual desire varies enormously from person to person, so there’s no magic number of times per week you should want sex. What matters is whether the change bothers you. Clinically, low sexual desire becomes a diagnosable condition when you’ve experienced a persistent lack of interest in or motivation for sexual activity for at least six months, and it causes you real personal distress. If you’re content with where things are, there’s no problem to solve regardless of what anyone else’s “normal” looks like.
That said, a noticeable drop from your own baseline is worth paying attention to. It’s often your body’s way of signaling that something else is off, whether that’s a hormonal shift, a medication side effect, poor sleep, or relationship strain.
Medications That Suppress Desire
Antidepressants are the most well-known libido killers. SSRIs, the class that includes sertraline, fluoxetine, and paroxetine, cause sexual side effects in an estimated 30 to 50 percent of people who take them. Those side effects range from reduced desire to difficulty with arousal and orgasm. If your sex drive dropped after starting or changing an antidepressant, the timing is probably not a coincidence.
SSRIs aren’t the only culprits. Birth control pills, some blood pressure medications, opioid painkillers, and anti-seizure drugs can all dampen desire. If you suspect a medication is involved, don’t stop taking it on your own. A dose adjustment or switch to a different drug in the same class often resolves the issue without sacrificing the medication’s benefits.
Hormonal Shifts at Different Life Stages
Hormones are the most direct biological driver of sexual desire, and they shift constantly throughout life. For women, perimenopause and menopause bring a significant drop in estrogen production. That drop triggers a cascade: hot flashes and night sweats disrupt sleep, vaginal tissue becomes drier and thinner, and penetrative sex can become painful. When sex hurts, it makes sense that your brain stops wanting it. There’s also evidence that falling testosterone plays a role, and testosterone therapy has shown benefit for low desire in both perimenopausal and postmenopausal women.
For men, testosterone production declines gradually starting around age 30, typically dropping about 1 percent per year. Most men don’t notice this slow decline, but some experience a more pronounced drop that affects energy, mood, and sex drive together. Conditions like obesity, type 2 diabetes, and chronic stress can accelerate the decline at any age.
Thyroid problems affect both sexes. An underactive thyroid slows your metabolism, saps your energy, and frequently takes your libido down with it. This is one of the more treatable causes once identified.
Sleep, Stress, and Everyday Habits
Your daily habits have a more powerful effect on desire than most people realize. Sleep is a good example: a meta-analysis of sleep deprivation studies found that going 24 hours or more without sleep significantly reduces testosterone levels in men. While a single rough night won’t tank your hormones, chronic sleep debt, the kind where you’re consistently getting five or six hours, creates a hormonal environment that works against desire in both men and women.
Chronic stress operates through a similar mechanism. When your body is locked in a prolonged stress response, it prioritizes survival over reproduction. Cortisol stays elevated, sex hormones get suppressed, and your brain simply doesn’t flag sex as a priority. This isn’t a character flaw. It’s basic physiology.
Alcohol is another common factor. A drink or two might lower inhibitions, but regular heavy drinking suppresses hormone production and interferes with arousal. Exercise generally helps by improving blood flow, mood, and hormone balance, though overtraining can have the opposite effect, particularly in endurance athletes.
Relationship and Psychological Factors
Desire doesn’t exist in a vacuum. Unresolved conflict, emotional distance, resentment, and mismatched expectations about sex are some of the most common reasons people lose interest. These aren’t always dramatic issues. Sometimes it’s the slow accumulation of feeling unheard, unsexy, or disconnected from a partner over months or years.
Depression and anxiety suppress desire even without medication. Body image problems, a history of trauma, and performance anxiety all play roles too. For many people, the cause is a feedback loop: low desire creates guilt or tension, which creates more stress, which further suppresses desire. Breaking that cycle often requires addressing the emotional layer, not just the physical one.
What Testing Looks Like
If lifestyle factors don’t explain what’s going on, a blood workup can help identify hormonal or medical causes. Your doctor will typically start with a total testosterone test, which measures both the testosterone circulating freely in your blood and the portion bound to proteins. If results are borderline or unclear, a follow-up test for sex hormone-binding globulin (SHBG) can help clarify how much testosterone your body can actually use.
Beyond testosterone, a full picture usually includes thyroid function, prolactin levels (a hormone produced by the pituitary gland that, when elevated, suppresses desire), and basic metabolic markers like blood sugar and iron. For women, estrogen and progesterone levels may also be checked depending on age and symptoms. These tests are straightforward blood draws and can rule out or confirm a medical cause relatively quickly.
Treatment Options
Treatment depends entirely on what’s driving the problem. Hormone replacement, whether estrogen for menopausal symptoms or testosterone for a confirmed deficiency, can be effective when the cause is clearly hormonal. For vaginal dryness making sex painful, localized estrogen treatments and over-the-counter lubricants often make a significant difference on their own.
For premenopausal women with persistently low desire that isn’t explained by another condition, two FDA-approved medications exist. One is a daily pill that works on brain chemistry related to desire. The other is an injection you self-administer at least 45 minutes before sexual activity. In clinical trials, the injectable version improved sexual desire scores compared to placebo, though the benefit was relatively modest, about 25 percent improvement versus 17 percent with placebo. Neither is a magic fix, and both work best alongside other changes.
For many people, the most effective approaches don’t involve medication at all. Improving sleep, managing stress, adjusting a problematic medication, increasing physical activity, and addressing relationship dynamics can each move the needle substantially. Therapy, particularly approaches designed for sexual concerns or couples work, has strong evidence behind it when psychological or relational factors are involved.
Nutritional Factors Worth Knowing
Nutrient deficiencies don’t get as much attention as hormones, but they can quietly contribute to low desire. Zinc is involved in testosterone production, and even a mild deficiency can affect sexual function. The recommended daily intake for adult men is 11 milligrams, easily met through foods like oysters, red meat, pumpkin seeds, and lentils. Supplementing beyond 40 milligrams per day isn’t recommended and can cause side effects.
Vitamin D deficiency, which is widespread in people who spend most of their time indoors, has been linked to lower testosterone levels and general fatigue. Magnesium supports sleep quality and stress regulation, both of which feed directly into desire. These aren’t miracle supplements, but correcting a genuine deficiency can remove one more barrier.