What Vitamin Deficiency Causes Low Libido?


Feeling an ongoing lack of desire or interest in sexual activity is a distressing issue that can negatively impact wellbeing and relationships.

What Vitamin Deficiency Causes Low Libido?

Low libido, also known as a low sex drive, is quite common. Studies estimate over 30% of men and up to 43% of women experience bothersome low sexual desire at some point.

The causes of low libido are complex, involving a mix of physical, mental, emotional, and lifestyle factors. Hormone changes, stress, depression, medical conditions, medications, poor body image, fatigue, relationship problems, and nutrition can all contribute.

One correctable cause of low libido to consider is a simple vitamin deficiency. Certain vitamins play key roles in maintaining normal sexual desire and functioning.

Not getting enough of these important micronutrients may dampen libido. Identifying and treating a vitamin deficiency may help revive your sex drive.

Vitamin D Deficiency and Low Libido

One of the most common vitamin deficiencies associated with low sex drive is a lack of vitamin D.

Vitamin D is sometimes referred to as the “sunshine vitamin” since the skin makes vitamin D when exposed to ultraviolet sunlight. Despite this, deficiency is rampant, with an estimated 1 billion people worldwide having low levels of this critical vitamin.

Here’s an overview of the compelling links between vitamin D and libido:

  • Vitamin D deficiency is correlated with decreased testosterone levels in men and lower estrogen and progesterone levels in women. These sex hormones strongly influence sexual desire.
  • Multiple studies demonstrate vitamin D supplementation increases testosterone levels in men, which plays a key role in libido and sexual performance.
  • Research finds that women with low libido often have inadequate vitamin D levels. Correcting the deficiency through supplementation leads to improvements in sexual functioning.
  • One study found 65% of premenopausal women with hypoactive sexual desire disorder, defined as a deficiency or absence of sexual fantasies and desire for sexual activity causing distress, had vitamin D deficiency.
  • Animal studies also report a connection between vitamin D status and sexual behavior linked to estrogen levels and gene expression in certain brain regions.

The scientific evidence clearly shows that low vitamin D levels contribute to low testosterone, sex hormone imbalances, and sexual dysfunction like low libido in both men and women.

What vitamin deficiency causes low libido? The research points to vitamin D deficiency as a highly prevalent and correctable cause of low sex drive.

Symptoms of Vitamin D Deficiency

Low libido may be one of the first prominent signs of a suboptimal vitamin D status. However, deficiency can also cause an array of other subtle symptoms before developing into more overt disease.

Here are some common signs and symptoms of vitamin D deficiency:

  • Fatigue, low motivation, and mood changes like depression
  • Bone aches and muscle weakness
  • Impaired wound healing and longer illness recovery times
  • Hair loss
  • Recurrent infections due to depressed immune function
  • Bone loss and conditions like osteoporosis and rickets

Left untreated over the long-term, inadequate vitamin D levels significantly raise risks for serious health problems:

  • Cardiovascular disease
  • Hypertension
  • Diabetes
  • Multiple sclerosis
  • Certain cancers like colon, prostate, and breast cancer
  • Autoimmune disorders
  • Neurological conditions like Alzheimer's disease, dementia, and Parkinson's disease

Due to the vague, nonspecific symptoms, vitamin D deficiency often goes undiagnosed until more severe health issues emerge. Testing blood levels is necessary to identify a deficiency in the early stages.

What Causes Vitamin D Deficiency?

What are some common reasons vitamin D levels may become low enough to potentially cause low libido and other problems?

Inadequate Sunlight Exposure

Spending too much time indoors and not getting enough sun is a major cause of vitamin D deficiency. To maintain healthy D levels, aim for around 10-30 minutes of direct midday sunlight exposure two to three times per week. Darker skin requires more sun exposure to generate vitamin D.

Overuse of Sunscreen

While important for skin cancer prevention, heavy or improper use of sunscreen can block the UV rays required for vitamin D synthesis in the skin. Opt for sunscreen with a moderate SPF 15-30 rating and apply thinly.

Insufficient Dietary Intake

Very few foods naturally contain vitamin D. The main dietary sources are fatty fish like salmon, mackerel, sardines, egg yolks, fish liver oils, and some varieties of mushrooms. Fortified foods like milk, soy milk, yogurt, orange juice and cereals contain some D, but often in relatively low, insufficient amounts.


Carrying excess body fat binds and pulls vitamin D into fat tissue so less is available in the bloodstream. Obese individuals require 2-3 times more vitamin D intake compared to normal weight people. Losing weight can help release stored vitamin D.


As we get older, the skin becomes less efficient at producing vitamin D from sun exposure. The kidneys also convert less vitamin D into its active form. These age-related changes make deficiency more likely.

Certain Medications

Some medications are associated with lower vitamin D levels. These include laxatives, statins, steroids, weight loss drugs, seizure medications, HIV treatment, and drugs that treat high blood calcium.

Digestive Disorders

Malabsorption issues, celiac disease, Crohn's disease, and non-alcoholic fatty liver disease can impair vitamin D absorption and increase deficiency risk.


Some people inherit genes that reduce vitamin D activation and availability in the body. Certain genetic differences explain why vitamin D deficiency is more prevalent among African Americans, Hispanics, and Native Americans.

Widespread vitamin D deficiency relates to inadequate sun exposure, dietary intake, medications, and health conditions. Deficiency has become a global epidemic, underscoring the importance of testing and treatment.

Why exactly does low vitamin D relate to low libido and sexual performance issues in men and women? Research has uncovered some specific ways vitamin D intersects with sex hormone biology:

  • Increases Testosterone Levels: Multiple studies demonstrate vitamin D supplementation effectively and safely raises testosterone levels in men. This male sex hormone is fundamental for libido, arousal, sexual function, and maintaining fertility.
  • Regulates Estrogen and Progesterone: Vitamin D influences estrogen and progesterone production in women. These key female sex hormones control menstrual cycles, ovulation, sexual development, and bone health. Vitamin D deficiency disrupts hormonal balance.
  • Enhances Sperm Health: In men, vitamin D plays various roles in supporting testosterone synthesis, semen quality, and sperm count, structure, and motility. Deficiency impairs male fertility.
  • Boosts Androgen Receptors: Vitamin D may increase the number of androgen receptors available for testosterone to bind to, magnifying its biological effects. This may enhance libido and sexual performance.
  • Impacts Ovulation: Vitamin D helps regulate ovulation and fertility in women. According to studies, women with adequate vitamin D levels have higher pregnancy success rates compared to deficient women.
  • Affects Estrogen Receptor Expression: Vitamin D influences activation of estrogen receptor sites throughout the body. This has widespread effects on reproductive health. Deficiency may reduce estrogen receptor activity.

Through its diverse effects on hormones, fertility, and sexual functioning, having healthy vitamin D levels provides a biological foundation for a normal, healthy libido and sex life.

Diagnosing Low Vitamin D

The only way to accurately determine vitamin D status is through a simple blood test.

This test measures the main storage form of vitamin D in the body known as 25-hydroxyvitamin D. Optimal levels for health and libido fall between 50-80 ng/ml.

Below 30 ng/ml is considered deficient, while between 30-50 ng/ml is insufficient. Testing is the only way to detect a deficiency, since symptoms may not be obvious, especially in the early stages.

Talk to your doctor about getting your vitamin D level tested if experiencing fatigue, mood issues, frequent sickness, hair loss, bone aches, muscle weakness, or low libido. Groups at high risk for deficiency like the elderly, darker skinned individuals, the obese, and those with malabsorption issues should prioritize testing.

If deficient, improving vitamin D levels under medical supervision is simple, safe, and effective. Treatment typically involves sensible sun exposure along with vitamin D supplements in adequate doses.

Depending on the degree of deficiency, anywhere from 1,000 IU to 10,000 IU of vitamin D daily is usually required to restore normal levels. Taking supplements with fatty foods improves absorption. Repeat blood tests help monitor progress.

Healthy Ways to Optimize Vitamin D Levels

Here are some lifestyle measures to ensure you maintain optimal vitamin D status to support libido, health, and wellbeing:

Get Regular Safe Sun Exposure

Aim for 10-30 minutes of unprotected sun exposure to bare skin 2-3 times per week during peak hours. Any skin tone darker than pale may need 30 minutes to an hour or more. Take caution not to burn.

Take Vitamin D Supplements

Oral vitamin D supplements effectively deliver concentrated doses. Look for D3 or cholecalciferol, preferably in oil for better absorption. The dosage required depends on your blood level and factors like obesity.

Eat Vitamin D-Rich Foods

Include oily fish like salmon and mackerel, fish liver oils, egg yolks, and mushrooms in your diet. Fortified milk and plant milks, cereals, yogurt, and orange juice can provide smaller amounts.

Maintain a Healthy Weight

Carrying excess weight traps vitamin D in fat cells. Shedding extra pounds releases stored vitamin D to help correct deficiency.

Check Medications

Discuss your medications with a doctor and have levels monitored. Adjusting dosages or use of supplements may help counteract drug effects on vitamin D.

Consider UVB Light Therapy

For those unable to get adequate sunshine, UVB lamps that emit therapeutic wavelengths can safely boost vitamin D levels at home.

Get Testing

The only way to confirm your status is to get a 25-hydroxyvitamin D blood test. Retesting periodically helps assess treatment and tailor supplementation.

With some sun exposure, a vitamin D-rich diet, and supplements as needed, restoring optimal vitamin levels is straightforward. Proper testing and monitoring ensures treatment effectiveness.


  • Low libido is a complex issue, but one potential underlying cause is a simple vitamin D deficiency, which is extremely common worldwide.
  • Vitamin D plays critical roles in regulating sex hormone production, sexual development, sperm quality, fertility, and sexual functioning.
  • In both men and women, low vitamin D is correlated with imbalances in testosterone, estrogen, and other sex hormones that dampen libido.
  • Correcting vitamin D deficiency through safe sun exposure, food sources, and supplementation can help restore normal hormone levels and revive sex drive.
  • Testing vitamin D blood levels is key, since low libido may be the only obvious symptom initially. Get tested if at risk for deficiency or struggling with sexual health issues.
  • Work with your doctor to use vitamin D testing to guide appropriate treatment. Optimizing your vitamin D status provides biological support for robust libido and sexual health.

As a regulator of sex hormones, vitamin D deficiency is a common yet correctable cause of low libido. Take a proactive approach to assessing and improving your vitamin D status if libido decline is a concern. Often raising low levels can reignite sexual desire and functioning.

What vitamin deficiency is linked to low libido?

Vitamin D deficiency is strongly associated with low libido

  • Vitamin D helps regulate sex hormone production in both men and women. Low levels are linked to imbalances in testosterone, estrogen, and progesterone.
  • Studies show vitamin D supplementation increases testosterone levels and improves sexual function.
  • Up to 65% of women with low libido have vitamin D deficiency. Correcting D levels improves libido.
  • Vitamin D supports fertility, sperm health, hormone balance, and sexual performance. Deficiency impairs sexual health.

What are symptoms of vitamin D deficiency?

Symptoms of vitamin D deficiency may include:

  • Fatigue, mood changes, and depression
  • Muscle weakness and bone loss
  • More frequent illnesses and infections
  • Hair loss and slow wound healing
  • Bone and back pain
  • Low libido

Deficiency often causes vague or no symptoms in early stages. Testing vitamin D blood levels is required to confirm.

What causes vitamin D deficiency?

Some common causes of vitamin D deficiency include:

  • Inadequate sun exposure
  • Sunscreen blocking UV rays
  • Limited dietary sources like fatty fish, egg yolks, fortified foods
  • Obesity
  • Aging
  • Certain medications
  • Malabsorption disorders
  • Darker skin tones

Widespread vitamin D deficiency has become an epidemic affecting an estimated 1 billion people globally.

How is vitamin D deficiency treated?

Treating vitamin D deficiency involves:

  • Getting 10-30 minutes of direct sun exposure 2-3 times per week
  • Taking oral vitamin D supplements - dosage depends on blood level
  • Eating vitamin D-rich foods like salmon, mackerel, eggs, fortified milk
  • Losing excess weight if obese
  • Considering UVB light therapy if sun exposure is insufficient

Testing blood levels guides proper supplementation and monitoring.

How may restoring vitamin D levels help low libido?

Optimizing vitamin D levels provides several benefits:

  • Raises testosterone and regulates sex hormones
  • Supports fertility, sperm health and sexual performance
  • Contributes to energy, mood, muscle and bone strength
  • Enhances immunity and overall wellbeing

Correcting a deficiency provides biological support for reviving libido and improving sexual health.

Takeaway Points

  • Vitamin D deficiency is a prevalent yet correctable cause of low libido
  • Vitamin D is vital for sex hormone regulation, fertility and sexual functioning
  • Getting blood levels tested is key to detecting and treating deficiency
  • Raising low vitamin D often restores libido along with overall health

Discuss vitamin D testing and treatment with your doctor if struggling with low sex drive.

Sign up to our newsletter and enjoy 10% off one order

Which product do I need?