Low libido is one of the most common sexual health concerns, and it rarely has a single cause. Sexual desire sits at the intersection of hormones, brain chemistry, stress levels, sleep, medications, and relationship dynamics. That means there’s no single fix, but there are several evidence-backed strategies that can make a real difference depending on what’s driving the problem.
How Your Brain and Hormones Drive Desire
Testosterone is the primary hormone controlling sexual desire in both men and women. It acts on areas of the brain involved in sexual motivation, including regions that process emotional and erotic stimuli. But testosterone doesn’t work alone. Some of it gets converted into estrogen inside the brain, and that conversion turns out to be important for desire too. In studies of men given testosterone, those who also received a drug that blocked estrogen production reported significantly lower sexual desire than those who didn’t. Both hormones need to be present for the full picture of wanting sex.
A useful way to think about desire comes from what researchers call the Dual Control Model. Your sexual response system has two sides: an accelerator (things that turn you on) and a brake (things that suppress arousal). People vary naturally in the sensitivity of both. The “brake” side breaks down into two categories: fear of performance failure and external threats like relationship tension or stress. If your libido feels stuck, the issue may not be a weak accelerator. It may be that something is pressing hard on the brake. Identifying which one applies to you is the first step toward fixing it.
Check Whether a Medication Is the Cause
If your libido dropped around the time you started a new medication, that’s not a coincidence. Antidepressants that increase serotonin are among the most common culprits. Sexual side effects, including reduced desire, difficulty with arousal, and trouble reaching orgasm, occur in 30% to 80% of people taking SSRIs. The worst offenders include fluoxetine (Prozac), paroxetine (Paxil), sertraline (Zoloft), and venlafaxine (Effexor), all with rates above 30%.
If this applies to you, talk to the prescribing doctor. Dose reduction is typically the least disruptive first step. Switching to an antidepressant with a lower sexual side effect profile is another option. Bupropion, mirtazapine, and moclobemide all cause sexual dysfunction in fewer than 10% of users. For people who need to stay on their current medication, adding bupropion at 150 to 300 mg has the strongest evidence for reversing sexual side effects across desire, arousal, and orgasm in both men and women. Exercise and yoga have also shown benefit as non-drug approaches to counteracting these effects.
Exercise for Better Sexual Response
Physical activity improves libido through multiple pathways: better blood flow, hormonal shifts, reduced stress, and direct effects on sexual arousal circuits. The type of exercise matters, and the research paints a more nuanced picture than “just work out more.”
In women, aerobic exercise at moderate to high intensity (roughly 60% to 80% of maximum effort) raises circulating testosterone, estradiol, and cortisol. Moderate-intensity exercise also activates the sympathetic nervous system in a way that directly increases physiological sexual arousal. Studies using erotic stimuli found that women showed significantly higher genital arousal 15 and 30 minutes after exercise compared to a no-exercise control. Interestingly, this effect wasn’t present immediately after exercise, and very high-intensity exertion actually reduced arousal. The sweet spot is moderate effort, not exhaustion.
For both men and women, regular exercise also lowers chronic stress, which is one of the strongest brakes on desire. Low-intensity exercise (a brisk walk, gentle cycling) specifically reduces cortisol, the body’s main stress hormone. That alone can create more room for desire to surface.
Sleep and Testosterone
Sleep deprivation reliably lowers testosterone. A meta-analysis of studies on healthy men found that total sleep deprivation (staying awake for 24 hours or more) produced a statistically significant drop in testosterone levels. Going 40 to 48 hours without sleep made the decline even steeper. Partial sleep deprivation, like cutting sleep short by a couple of hours, showed a smaller effect that didn’t reach statistical significance, but the trend was still downward.
The practical takeaway: consistently getting full nights of sleep protects the hormonal foundation of desire. If you’re sleeping five or six hours and wondering why your libido has vanished, that’s a good place to start. Most of the testosterone production in men happens during sleep, so short-changing it has a direct hormonal cost.
Eat for Sexual Health
Diet influences sexual function more than most people expect. A trial comparing a Mediterranean diet to a standard low-fat diet in people with newly diagnosed type 2 diabetes found that the Mediterranean group maintained significantly better sexual function scores over time. Both men’s and women’s scores declined less in the Mediterranean group, with meaningful differences on standardized sexual function questionnaires.
The Mediterranean pattern emphasizes vegetables, fruits, whole grains, olive oil, nuts, fish, and moderate wine. These foods support vascular health, reduce inflammation, and improve blood flow, all of which matter for arousal. You don’t need to overhaul your diet overnight. Shifting toward more whole foods and healthy fats while reducing processed food and sugar moves the needle.
Know Your Testosterone Levels
If lifestyle changes aren’t enough, getting your testosterone checked is a reasonable next step, especially for men over 30. A large analysis of U.S. men found that average morning testosterone levels decline with age: around 500 ng/dL for men in their early twenties, dropping to about 430 ng/dL by ages 40 to 44. The researchers suggested that the commonly used cutoff of 300 ng/dL for “low testosterone” may be too generous. Age-specific lower thresholds ranged from 350 ng/dL for men in their late thirties and forties to 409 ng/dL for men in their early twenties.
If your levels fall in the lower range for your age and you have symptoms (low desire, fatigue, mood changes), hormone therapy may be worth discussing. For women, testosterone testing is less standardized, but persistently low desire that doesn’t respond to other interventions can sometimes be traced to hormonal factors as well.
Supplements: What the Evidence Actually Shows
Maca root is one of the most widely marketed supplements for libido. Clinical trials have typically used doses around 3,000 mg per day over 8 to 12 weeks. Some small studies have reported subjective improvements in sexual desire, but the largest and most rigorous trials have been hampered by small sample sizes and inconclusive results. Maca is generally safe, but the evidence for it is far weaker than supplement marketing suggests.
Fenugreek extract has slightly stronger data behind it. Studies in postmenopausal women using a standardized extract at 500 mg per day (split into two doses) for 42 to 90 days reported improvements in sexual complaints alongside other menopausal symptoms. The active compounds appear to have mild estrogen-like effects. Ashwagandha is another popular option, often cited for its stress-reducing properties, but clinical data specifically on libido remains limited.
None of these supplements are a substitute for addressing the root causes. They may offer a modest boost alongside more impactful changes.
Prescription Options for Persistent Low Desire
For women with persistently low sexual desire that causes distress, flibanserin (brand name Addyi) is the only FDA-approved medication specifically for this condition in premenopausal women. It’s a daily, non-hormonal pill that works on brain chemistry rather than hormones, gradually increasing sexual desire and the frequency of satisfying sexual experiences over weeks of use. One important restriction: alcohol must be avoided within two hours of taking it, as the combination can cause dangerously low blood pressure or fainting.
For men, there is no FDA-approved medication specifically for low desire (as opposed to erectile dysfunction). Treatment usually focuses on addressing the underlying cause, whether that’s low testosterone, medication side effects, or psychological factors. When the issue is hormonal, testosterone replacement therapy is the primary medical approach.
Address the Psychological Brakes
Stress, anxiety, relationship conflict, body image concerns, and unresolved trauma are among the most powerful suppressors of sexual desire. They activate the inhibitory side of the sexual response system, and no amount of testosterone or supplements can fully override that signal.
Chronic stress is particularly damaging. In evolutionary terms, the brain interprets ongoing stress as a signal that conditions aren’t safe for reproduction, and it dials down sexual motivation accordingly. This isn’t a character flaw. It’s a deeply wired biological response. Reducing your overall stress load through better boundaries, exercise, adequate rest, and professional support when needed can unlock desire that was always there but being actively suppressed.
Performance anxiety specifically predicts sexual dysfunction, and it responds well to psychological treatment. If you notice that desire disappears the moment sex becomes a possibility (rather than being absent all the time), that pattern points toward anxiety rather than a hormonal or physical cause. Couples therapy or individual work with a sex therapist can be highly effective for this kind of brake.