Vitamin D Deficiency: Surprisingly Common in Cambodia

Many people assume that living in a tropical country like Cambodia means getting enough vitamin D naturally. Surprisingly, this is not always true. Medical studies from Southeast Asia have found that vitamin D deficiency affects a significant portion of the population, including children, adults, pregnant women, and older adults.

In Phnom Penh and other urban areas, many people spend most of their day indoors at offices, factories, schools, shopping malls, or using transportation. Combined with sun avoidance, sunscreen use, air pollution, and diets low in vitamin D-rich foods, deficiency has become increasingly common.

Understanding vitamin D deficiency can help prevent long-term health problems and improve overall well-being.

What is Vitamin D?

Vitamin D is a fat-soluble vitamin that functions like a hormone in the body. It helps absorb calcium and phosphorus, supporting healthy bones, muscles, nerves, and the immune system.

Your body produces vitamin D when your skin is exposed to ultraviolet B (UVB) rays from sunlight. Smaller amounts come from food and dietary supplements.

Why is Vitamin D Deficiency Common in Cambodia?

Although Cambodia enjoys abundant sunshine throughout the year, several factors contribute to deficiency:

• Most people work indoors during daylight hours.
• Many avoid direct sunlight because of heat or cosmetic preferences.
• Sunscreen blocks much of the UVB rays needed for vitamin D production.
• Air pollution in urban areas may reduce UVB exposure.
• Traditional diets often contain limited vitamin D-rich foods.
• Older adults produce less vitamin D through the skin.
• Obesity can reduce the body’s availability of vitamin D.

As a result, even people living in sunny Phnom Penh may have low vitamin D levels.

Who Is Most at Risk?

Certain groups have a higher risk of vitamin D deficiency:

• Office workers
• Factory workers
• Students
• Older adults
• Pregnant and breastfeeding women
• Infants who are exclusively breastfed without supplementation
• People with obesity
• Individuals with chronic kidney or liver disease

• People with digestive disorders that reduce nutrient absorption

   

Symptoms of Vitamin D Deficiency

Vitamin D deficiency often develops slowly and may not cause symptoms initially.

Common symptoms include:

• Persistent fatigue
• Muscle weakness
• Bone pain
• Frequent illness or infections
• Back pain
• Low mood
• Hair loss
• Slow wound healing

In children, severe deficiency can lead to poor bone development and rickets.

Why Vitamin D Matters

Vitamin D plays an essential role throughout the body.

Strong Bones

Vitamin D helps your body absorb calcium, reducing the risk of osteoporosis and fractures.

Healthy Muscles

Adequate vitamin D supports muscle strength and balance, lowering the risk of falls in older adults.

Immune Function

Vitamin D helps regulate the immune system and supports the body’s defense against infections.

Pregnancy

Maintaining healthy vitamin D levels during pregnancy supports maternal health and fetal bone development.

How is Vitamin D Deficiency Diagnosed?

A healthcare professional may recommend a blood test called the 25-hydroxyvitamin D (25(OH)D) test to measure your vitamin D level.

Testing may be recommended if you have symptoms, belong to a high-risk group, or have osteoporosis or chronic medical conditions.

How Can You Improve Vitamin D Levels?

Safe Sun Exposure

Short periods of sunlight on the arms and legs several times each week may help many people produce enough vitamin D. The exact duration depends on skin tone, time of day, clothing, weather, and sunscreen use.

Avoid prolonged sun exposure that causes sunburn.

Key Takeaway

Vitamin D deficiency is more common in Cambodia than many people realize, even with year-round sunshine. Indoor lifestyles, limited dietary sources, and reduced sun exposure contribute to low vitamin D levels across all age groups. If you have risk factors or symptoms, speak with a qualified healthcare professional about testing and appropriate treatment. Maintaining healthy vitamin D levels supports strong bones, healthy muscles, and a well-functioning immune system.