What Vitamins Should I Take? How to Find Out in 5 Minutes

“What vitamins should I take?” is one of the most searched health questions in Europe — and one of the worst answered.

Most advice defaults to a standard multivitamin, regardless of who is asking. But your answer depends on how you eat, how you sleep, how much sun you get, and what your body is actually missing.

Here is how to figure it out.

Why “Just Take a Multivitamin” Is Bad Advice

The usual advice — just take a multivitamin — ignores a simple truth:

Different people have different nutritional gaps.

A vegan who eats a varied whole-food diet has very different needs from someone who skips breakfast, works night shifts, and rarely goes outside.

Giving both people the same supplement is a guess. And in nutrition, guessing rarely produces good results.

A 2020 review in the British Journal of Nutrition found that targeted supplementation — addressing identified individual gaps — performed better than general multivitamin use.

The main point

You do not need to guess.
You also do not always need a blood test.

A structured look at your diet, lifestyle, and symptoms can often identify your most likely gaps with strong practical accuracy.

The 5 Questions That Actually Predict Your Vitamin Needs

These five factors explain most nutritional gaps in otherwise healthy adults.

1) What does your diet look like?

Diet is the biggest predictor of deficiency.

Common patterns

• Vegan or vegetarian
  Higher risk of B12 deficiency, and often lower in omega-3, vitamin D, iron, zinc, and calcium.
• Low dairy or lactose intolerant
  Often lower in calcium and vitamin D.
• Low fruit and vegetable intake
  May be low in vitamin C, folate, and magnesium.
• High processed food intake
  Commonly low in magnesium, B vitamins, and zinc.
• Varied whole-food diet
  Lower risk overall, but vitamin D and omega-3 may still be insufficient.

2) How much natural sunlight do you get?

Vitamin D is made in the skin in response to UV-B sunlight.

In Northern and Central Europe, sunlight is often not strong enough to produce enough vitamin D for about 6 months of the year, usually October through March.

You may need vitamin D if you:

• work indoors
• live above latitude 40°N
• cover most of your skin outdoors
• get limited sun exposure

Main idea

For many adults in Europe, vitamin D supplementation is not just for “at-risk” people. It is common and often necessary.

3) How is your energy and sleep?

Persistent fatigue can be a nutritional signal.

Common nutrient links

• Iron deficiency
  Especially common in women who menstruate
• B12 deficiency
  Especially common in vegans and vegetarians
• Magnesium deficiency
• Vitamin D insufficiency

Poor sleep quality is also strongly linked with low magnesium.

Signs magnesium may matter

• trouble falling asleep
• waking up often
• feeling unrested in the morning
• muscle tension or cramps

4) How much do you exercise?

Regular exercise, especially endurance training, increases demand for several nutrients.

Nutrients often affected

• Magnesium — lost through sweat
• Iron — needed more when red blood cell turnover rises
• B vitamins — used more during high energy expenditure

If you exercise more than 3–4 times per week, your micronutrient needs may be higher than someone who is mostly sedentary.

5) What is your life stage and health context?

Your age, reproductive stage, and stress levels all affect nutritional needs.

Examples

• Women in their 20s and 30s who menstruate
  Often have higher iron needs
• Pregnant or planning pregnancy
  Folate is critical, and iron, iodine, and vitamin D also become more important
• Perimenopause and menopause
  Calcium, vitamin D, and magnesium become more important for bone health
• Adults over 50
  B12 absorption often decreases with age
• High stress lifestyle
  Can increase depletion of magnesium and B vitamins

The Most Common Vitamin Gaps in European Adults

Population data highlighted these common shortfalls:

Nutrient	Who Is Most at Risk	Key Symptoms
Vitamin D	Almost everyone in Northern Europe, Oct–Mar	Fatigue, low mood, frequent illness
Magnesium	High-stress individuals, frequent exercisers	Poor sleep, muscle cramps, anxiety
Iron	Women who menstruate, vegetarians	Exhaustion, cold hands and feet, brain fog
Vitamin B12	Vegans, vegetarians, adults over 50	Fatigue, tingling, low mood, brain fog
Omega-3	Low oily fish intake, vegans	Dry skin, poor concentration, joint stiffness
Folate	Women planning pregnancy, low vegetable intake	Fatigue, low mood

Key insight

Vitamin D and magnesium are commonly low even in adults who think they eat well.

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What You Probably Do Not Need to Supplement

Just as important as knowing what to take is knowing what to skip.

Most healthy adults with a varied diet usually do not need extra:

• Vitamin C
  Usually easy to get from fruit and vegetables
• Vitamin A
  Often available in eggs, dairy, and orange/yellow vegetables
  Too much can be harmful
• Vitamin K
  Common in leafy greens
• Calcium
  If you eat dairy regularly, you may already get enough

Main point

A good supplement plan is about filling gaps, not taking everything.

More ingredients do not always mean better results.

Ready to Find Out Which Vitamins Are Right for You?

Answer 5 questions. Get your personalized plan. Delivered in 30 daily sachets.

Build my plan →
https://www.careplusgcc.com

How to Build Your Own Supplement List

Almost everyone in Europe should consider:

• Vitamin D3 — 1,000–2,000 IU daily
• Magnesium glycinate or bisglycinate — 200–400 mg daily
• Omega-3 (EPA/DHA) — 500–1,000 mg daily if you eat oily fish less than twice a week

Add these if they match your profile:

• Vitamin B12 — if vegan, vegetarian, or over 50
• Iron — if you menstruate heavily or feel persistent fatigue
  (confirm with a GP before taking iron)
• Folate — if pregnant or planning pregnancy
• Zinc — if you eat little meat or seafood and get frequent colds

Important

This is a starting point, not a prescription.

The most accurate approach is to match your own lifestyle and habits to your likely nutritional gaps.

The Fastest Way to Get a Personalized Answer

The CarePlus quiz takes about five minutes.

It asks about:

• your diet
• your energy
• your sleep
• your activity level
• your health goals

From those answers, it identifies likely nutritional gaps and builds a daily sachet containing only what you need.

What it offers

• No blood test
• No appointment
• No generic 30-ingredient multivitamin

Frequently Asked Questions

Is it safe to take multiple vitamins at once?

Usually yes, but some nutrients compete for absorption. The key is taking only what you need in sensible doses.

Should I take vitamins in the morning or at night?

• Fat-soluble vitamins often absorb best with food
• Magnesium is often better in the evening
• B vitamins are often better in the morning

Do I need a doctor to tell me what vitamins to take?

Not always for general wellness. But if you suspect a real deficiency or take medication, professional advice is important.

How do I know if my vitamins are working?

Many people notice changes in energy, sleep, or mood within 4–8 weeks if they are correcting a real gap.

Related Reading

• Why personalized vitamins work better than multivitamins
• Vitamins for energy and fatigue: what actually works
• Vitamin D deficiency: signs, causes and how much you need
• What the CarePlus vitamin quiz actually does

Disclaimer

CarePlus content is for informational purposes only.
It does not constitute medical advice.
Its products are designed for wellness support, not for diagnosis or treatment.