Importance of Vitamin D During Menopause

Menopause affects more than hormone balance.

During perimenopause and menopause, multiple physiological changes—including declining estrogen, increased adiposity, and age-related reductions in vitamin D synthesis^5,10—may lower vitamin D levels.

This happens at a time when this nutrient is important for supporting bone density,^11,12 immune function,¹³ and healthy aging.^5,14

A startling 22% to 40% of middle-aged and older women have been found to be vitamin D deficient,⁸ with postmenopausal women showing especially high rates of deficiency.^11,15

Low vitamin D may contribute to several health concerns. The effects of lower vitamin D status are linked to reduced bone mass and increased fracture risk,^11,12 immune dysfunction, and inflammation,^13,16 and metabolic syndrome.^17,18 Low vitamin D has been associated with conditions such as sleep disturbances, depression, and joint pain that can make menopause difficult.¹¹

Taking oral vitamin D raises body levels and may support certain health outcomes, particularly in women with vitamin D deficiency.

How Menopause Lowers Vitamin D

According to a 2021 recommendation from the United States Preventive Services Task Force, 20 ng/mL is the minimum acceptable vitamin D serum level for most adults.^19,20 For optimal vitamin D status, Life Extension® recommends maintaining serum levels between 50 and 80 ng/mL.

In a 2022 analysis of data from the National Health and Nutrition Examination Survey (NHANES) dataset from 2001 to 2018, that included nearly 72,000 participants, vitamin D levels were less than 20 ng/mL in nearly a quarter of the population. Severe or moderate deficiency was more prevalent among women.²¹

In another study of 8,532 European postmenopausal women with osteoporosis or osteopenia, nearly 80%had vitamin D serum levels below 32 ng/mL, and about 32% had serum levels below 20 ng/mL, confirming that low vitamin D is common in older women at risk of fractures.²²

Menopause and aging can lower vitamin D status in several different ways, including:

• Reduced skin synthesis. Aging skin produces vitamin D less efficiently. A 70-year-old's skin synthesizes about 75% less vitamin D than a 20-year-old exposed to the same amount of sunlight.^1,2•
• Less activation. With age, the kidneys become less efficient at converting vitamin D to its active form, primarily due to declining renal function.³ Lower estrogen levels after menopause may further impair vitamin D metabolism.^4,5
• Greater intake needed. Due to reduced skin synthesis, lower renal activation, and often limited sun exposure, older adults typically require higher oral vitamin D intake to maintain adequate levels.^3,6
• Body composition changes. Menopause often increases body fat. Because vitamin D is fat-soluble, excess fat is associated with lower circulating vitamin D.^7-9

Vitamin D and Menopausal Symptoms

Lower vitamin D levels may be associated with more severe menopausal symptoms.

A 2025 observational study followed 100 menopausal women for two years, comparing those with vitamin D deficiency (less than 20 ng/mL) to those with levels higher than 30 ng/mL.²³

Compared with women whose vitamin D levels exceeded 30 ng/mL, women with vitamin D deficiency had:²³

• Lower estrogen,
• More severe menopausal symptoms,
• Lower bone mineral density, raising fracture risk, and
• Lower quality of life.

The most common menopausal symptoms—hot flashes and night sweats—affect up to 80% of menopausal women.^24,25 Observational research suggests that lower vitamin D levels are associated with greater symptom severity.^2,26,27 One observational study reported a nearly 6% increase in the risk of hot flashes for every 1 ng/mL decrease in serum vitamin D.²⁷

Other menopause symptoms include vaginal dryness, discomfort with intercourse, and urinary problems.²⁴ Some studies suggest that locally administered vaginal vitamin D may improve markers of vaginal health such as improving vaginal maturation and may reduce vaginal atrophy, a condition that leads to itching, burning, and pain.^28,29

Menopause is also associated with potentially harmful shifts in inflammatory signaling and immune regulation.^30-32 Vitamin D supports healthy immune responses and inflammatory balance; therefore, low vitamin D status may contribute to a more proinflammatory state in some women.^26,33,34

Vitamin D After Menopause

The health implications of low vitamin D levels are very important after menopause, as well. A 2024 review found that low vitamin D levels in postmenopausal women are associated with musculoskeletal frailty and a higher prevalence of cardiovascular risk factors.¹⁵ In other studies, vitamin D status is linked with:

• Bone health. In a population study of postmenopausal women, each 10 ng/mL reduction in vitamin D levels was associated with about a 33% higher risk of hip fracture.³⁵ A meta-analysis of clinical trials found that higher-dose oral vitamin D (greater than 482 IU/day, often with calcium) led to a roughly 18% lower hip fracture risk.³⁶
• Metabolic health. Vitamin D deficiency is associated with higher rates of metabolic syndrome, a group of conditions that raise risk for heart disease, stroke, and type 2 diabetes.¹⁰ In a clinical trial, postmenopausal women who took 1,000 IU of vitamin D3 daily for nine months had significant reductions in triglycerides, insulin resistance, and overall risk for metabolic syndrome.³⁷
• Glucose metabolism. When baseline vitamin D was low, supplementation improved markers of insulin resistance and lowered risk of high blood sugar.^37,38
• Muscle function. Low vitamin D status is associated with reduced physical performance in older adults. In a clinical trial of vitamin D-deficient postmenopausal women, taking just 1,000 IU of vitamin D3 daily for nine months significantly improved lower limb muscle strength and protected against the loss of lean muscle mass.³⁹

The Right Amount

Vitamin D needs aren't the same for everyone.

Women who are overweight or obese, for example, may need vitamin D intakes that are about two to three times higher to reach the same blood levels as normal-weight women.^8,40,41

Optimal vitamin D levels are critical for overall healthy aging. Daily oral doses of 5,000–8,000 IU of vitamin D3 may help maintain optimal blood levels. The 25-hydroxy vitamin D blood test is used to assess and adjust dose. Life Extension considers 50–80 ng/mL of serum 25-hydroxy vitamin D to be an optimal level.

Maintaining adequate vitamin D levels may help support bone, muscle, metabolic, and immune health during and after menopause and may help reduce severity of some menopausal symptoms.

Higher supplemental intakes may be appropriate for some individuals, particularly those with documented deficiency, obesity, malabsorption syndromes, or limited sun exposure, but should ideally be guided by blood testing and healthcare supervision.

Summary

Lower vitamin D levels have been associated with more severe menopausal symptoms.

Taking oral vitamin D to achieve optimal blood levels may lessen the severity of some menopausal symptoms and help support bone density, muscle strength, metabolic health, and immune function during and after menopause.

If you have any questions on the scientific content of this article, please call a Life Extension Wellness Specialist at 1-866-864-3027.

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