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Vitamin D & Brain Health Study | Role, Deficiency & Effects | UPSC Science

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📘 ENGLISH CONTENT

A recent study suggests that Vitamin D levels in your 30s and 40s may influence brain ageing in your 60s and 70s, highlighting its long-term importance for cognitive health.

About Vitamin D

Vitamin D (Calciferol) is a fat-soluble vitamin that is:

  • Naturally present in a few foods
  • Added to fortified foods
  • Available as dietary supplements
  • Synthesized in the skin when exposed to UV rays from sunlight

Sources of Vitamin D

Natural Sources:

  • Egg yolks
  • Saltwater fish
  • Liver

Fortified Foods:

  • Milk
  • Cereals
  • Yogurt

Sunlight Exposure:

  • Primary natural source through skin synthesis

Storage & Release

  • Stored in body fat during adequate sunlight
  • Released when sunlight exposure is limited

Functions of Vitamin D

  • Promotes calcium absorption
  • Maintains bone and teeth health
  • Regulates calcium and phosphorus levels
  • Supports:
  • Immune system
  • Neuromuscular function
  • Cell growth
  • Inflammation control
  • Glucose metabolism

Deficiency of Vitamin D

  • Children: Causes Rickets (soft and deformed bones)
  • Adults: Causes Osteomalacia (bone pain and muscle weakness)

Risk Groups:

  • People with darker skin (high melanin)
  • Individuals with limited sun exposure

Excess of Vitamin D (Toxicity)

High levels can lead to:

  • Nausea, vomiting
  • Muscle weakness
  • Confusion
  • Kidney stones
  • Irregular heartbeat
  • Severe cases: Kidney failure and death

Significance

  • Essential for long-term brain health
  • Important for bone strength and immunity
  • Balance is crucial → both deficiency and excess are harmful

📘 MCQs (ENGLISH)

Q1. Vitamin D is:

A. Water-soluble

B. Fat-soluble

C. Mineral

D. Protein

Answer: B

Q2. It is produced by:

A. Water

B. Air

C. Sunlight

D. Soil

Answer: C

Q3. It helps in absorption of:

A. Iron

B. Calcium

C. Sodium

D. Potassium

Answer: B

Q4. Deficiency in children causes:

A. Diabetes

B. Rickets

C. Cancer

D. Fever

Answer: B

Q5. Deficiency in adults causes:

A. Osteoporosis

B. Osteomalacia

C. Arthritis

D. Asthma

Answer: B

Q6. Natural source:

A. Rice

B. Egg yolk

C. Wheat

D. Sugar

Answer: B

Q7. Excess Vitamin D causes:

A. Strength

B. Weakness

C. Toxicity

D. Growth

Answer: C

Q8. It is stored in:

A. Blood

B. Bone

C. Fat

D. Muscle

Answer: C

Q9. Vitamin D helps:

A. Digestion

B. Bone health

C. Hearing

D. Vision

Answer: B

Q10. Risk group includes:

A. Fair skin

B. Dark skin

C. Short people

D. Tall people

Answer: B

📘 हिंदी कंटेंट

Vitamin D | UPSC Science

हाल के अध्ययन में पाया गया कि 30–40 वर्ष की उम्र में Vitamin D का स्तर आगे चलकर दिमाग की उम्र को प्रभावित करता है।

Vitamin D क्या है?

  • वसा में घुलनशील विटामिन
  • सूर्य के प्रकाश से बनता है
  • भोजन और सप्लीमेंट से मिलता है

स्रोत

  • अंडा
  • मछली
  • दूध (फोर्टिफाइड)

कार्य

  • कैल्शियम अवशोषण
  • हड्डियाँ मजबूत
  • रोग प्रतिरोधक क्षमता

कमी के प्रभाव

  • बच्चों में: रिकेट्स
  • वयस्कों में: ऑस्टियोमलेशिया

अधिकता के प्रभाव

  • उल्टी
  • कमजोरी
  • किडनी समस्या

महत्व

  • हड्डी
  • दिमाग
  • स्वास्थ्य

📘 MCQs (हिंदी)

Q1. Vitamin D कैसा है?

A. जल

B. वसा

C. खनिज

D. प्रोटीन

उत्तर: B

Q2. यह कैसे बनता है?

A. पानी

B. हवा

C. सूर्य

D. मिट्टी

उत्तर: C

Q3. यह किसके लिए जरूरी है?

A. आयरन

B. कैल्शियम

C. सोडियम

D. पोटैशियम

उत्तर: B

Q4. बच्चों में कमी से क्या होता है?

A. डायबिटीज

B. रिकेट्स

C. कैंसर

D. बुखार

उत्तर: B

Q5. वयस्कों में कमी से?

A. ऑस्टियोपोरोसिस

B. ऑस्टियोमलेशिया

C. गठिया

D. अस्थमा

उत्तर: B

Q6. प्राकृतिक स्रोत क्या है?

A. चावल

B. अंडा

C. गेहूं

D. चीनी

उत्तर: B

Q7. अधिकता से क्या होता है?

A. ताकत

B. कमजोरी

C. विषाक्तता

D. वृद्धि

उत्तर: C

Q8. यह कहाँ जमा होता है?

A. रक्त

B. हड्डी

C. वसा

D. मांस

उत्तर: C

Q9. यह किसके लिए है?

A. पाचन

B. हड्डी

C. सुनना

D. देखना

उत्तर: B

Q10. जोखिम समूह कौन है?

A. गोरी त्वचा

B. काली त्वचा

C. छोटे

D. लंबे

उत्तर: B

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