Vitamin D deficiency symptoms: how do you recognize it (especially after the age of 50)?

Important: Many complaints of a vitamin D deficiency are non-specific. Are you in doubt, or do you have persistent complaints? Discuss blood tests (25-OH-vitamin D) with your GP.

What is vitamin D and why is it so important?

Vitamin D is a hormone precursor. Your body produces it under the influence of sunlight (UVB), and also gets it from food — especially oily fish, egg yolks and fortified products. According to the Gezondheidsraad vitamin D plays a role in:

• Calcium and phosphorus balance (strong bones and teeth)
• Muscle function and strength — study shows link with muscle weakness in deficiency
• The immune system
• The functioning of many cells in the body

In the Netherlands, shortages are widespread during the winter months. The RIVM reported that at the end of winter, 7 to 26% of Dutch people had a vitamin D deficiency. That's why so many people look for symptoms — especially between October and March. The Nutrition Center confirms that many people over 50 need supplementation to meet their needs.

Vitamin D deficiency symptoms: what do you notice in daily life?

A long list of complaints is often mentioned online. The most medically relevant are:

1. Muscle weakness

Difficulty climbing stairs, getting up from a chair or walking for long periods of time. This is a classic signal of a clear deficiency — stronger than just 'being tired'. See also our article about fatigue during menopause if your complaints overlap with hormonal changes.

2. Bone and muscle pain

Diffuse aching pain, stiffness or a feeling of heaviness — especially in the back, pelvis or legs. With long-term severe deficiency, osteomalacia (bone softening) may occur.

3. More susceptibility to infections

Colds and flu that last longer or come back more often. Vitamin D supports the immune system; if there is a deficiency, that function may be less optimal.

4. Fatigue and concentration problems

This is mentioned a lot, but in itself it is a weak signal. In combination with muscle weakness or bone pain, vitamin D is a logical check — just like magnesium and B vitamins contained in Xodil for energy and recovery.

5. Mood complaints (especially in winter)

Winter depression (SAD) is associated with low vitamin D status. It is not a proven one-on-one relationship, but it is a reason to have your worth measured when you collapse in the dark months every year.

Vitamin D deficiency symptoms in women after 50

The Health Council advises all women aged 50 and over to take 10 micrograms (400 IU) of vitamin D daily — even without obvious complaints. Reasons:

• The skin produces vitamin D less efficiently from zunlight
• The intake from food may decrease
• Bone density and muscle strength become more vulnerable
• Many women in menopause experience fatigue and muscle pain — read: fatigue in menopause: causes and what really helps

That is why many women search for vitamin d deficiency symptoms women. The advice remains: have it measured and supplement specifically if your value is too low.

Risk groups in the Netherlands (check if you belong to them)

• People who rarely go outside
• People with a dark skin color
• Elderly people (70+ receive 20 µg advice — see Nutrition Center)
• Pregnant women and children (own advice - see Health Council)
• Overweight people (vitamin D is stored in fat tissue)
• People wearing sunscreen or covering clothing

How do you diagnose a vitamin D deficiency?

The reliable test is 25-hydroxyvitamin D (25-OH-D) in the blood. Interpretation (global, according to NHG guidelines):

• < 30 nmol/L: severe deficiency - medical follow-up
• 30–50 nmol/L: deficiency or insufficient — supplementation often necessary
• 50–75 nmol/L: sufficient for many people
• > 75 nmol/L: generally good

More explanation: Thuisarts.nl — vitamin D. Self-diagnosis via symptoms alone is unreliable.

What can you do if you have a vitamin D deficiency?

1. Sunlight (March–October)

15–30 minutes of daylight on arms and face, preferably between 11:00 AM and 3:00 PM. Do not burn.

2. Nutrition

Oily fish twice a week, eggs, enriched dairy. Food alone is not enough for most people in the Dutch winter.

3. Supplements

Dosage depends on your blood value and age. The Health Council recommends 10 µg/day for women aged 50+; If there is a measured deficiency, your doctor may prescribe a higher dose.

Vitamin D3 (cholecalciferol) is the usual form. Combine with vitamin K2 (MK-7) if you're taking high doses — both are in Xodil's formula. Always discuss high doses with a professional.

4. Systemic support in addition to vitamin D

Vitamin D is one piece of the puzzle. After the age of 50, B12 absorption, magnesium, sleep and hormonal changes also play a role. A single D3 pill won't solve everything — but it is one of the best-founded basic steps.

Do you not want to take vitamin D separately, but rather as part of a broader vitality system? Xodil Daily Packs combine D3 with 80+ ingredients — designed for energy, recovery and cellular health, without caffeine. More context:

• All ingredients and dosages
• Science behind Xodil
• How morning and evening packs work
• Frequently asked questions about Xodil
• Fatigue during menopause (related article)

Sources and further reading

• Health Council - Evaluation of nutritional standards for vitamin D (2012)
• RIVM — vitamin D in the Netherlands
• Thuisarts.nl — vitamin D
• EFSA — vitamin D

Frequently asked questions

What are the first symptoms of a vitamin D deficiency?

Often you don't notice anything. If there are complaints, they usually start with muscle weakness, bone or muscle pain, or fatigue.

Can a vitamin D deficiency cause fatigue?

Possibly, but fatigue is too common to be certain. Have your value measured. Read also: fatigue during menopause.

How much vitamin D per day after age 50?

The Health Council recommends 10 micrograms (400 IU) per day for women aged 50 and over. Men aged 70 and over receive 20 µg. In case of a measured deficiency, a higher dose may be necessary — only on the advice of your doctor.

Can you take too much vitamin D?

Yes. Chronic overdose may lead to hypercalcemia. Allow high doses to accompany.

Does vitamin D help with menopausal symptoms?

Indirectly possible via muscle pain, fatigue and bone health. It does not replace hormone therapy. See our extensive article: fatigue during menopause.

Where can I find vitamin D in Xodil?

Vitamin D3 is included in the morning mix of Xodil Daily Packs, together with K2, magnesium and B vitamins. View full ingredient list.

Last updated: June 2026. Based on guidelines from the Health Council, RIVM, Nutrition Center and NHG. This article does not replace medical advice.