Truth About Body Calcium 🦴 क्या सच में होती है शरीर में कैल्शियम कि कमी ?

Описание: Truth About Body Calcium 🦴
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🩸 vs 🦴 — Did you know calcium plays two very different roles in your body?

✨ In BLOOD:
⚡ Keeps your nerves firing
💓 Helps your heart & muscles contract
🩹 Needed for clotting

✨ In BONES:
🏗️ Builds strength & structure
📦 Acts as a calcium “bank” for the body

🔍 Tests:

Blood test → checks serum/ionized calcium, costs between 400 - 500 Rs

DEXA scan → checks bone calcium & density, costs between 2500 - 4000 INR

So remember — strong bones + balanced blood calcium = healthy you 💪

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1. Calcium in Blood vs. Calcium in Bone

Bone Calcium

Location: About 99% of body calcium is stored in bones and teeth as calcium phosphate crystals (hydroxyapatite).

Function:

Provides strength and rigidity to the skeleton.

Acts as a calcium reservoir to maintain blood calcium levels when needed.

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Blood Calcium

Location: Less than 1% of body calcium circulates in blood.

Forms in blood:

Ionized calcium (free calcium): Biologically active (~50%).

Protein-bound calcium: Mostly bound to albumin (~40%).

Complexed calcium: With anions like phosphate/citrate (~10%).


Function:

Crucial for nerve conduction and muscle contraction (including heart).

Important in blood clotting.

Regulates enzyme activity and hormone release.

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2. Regulation

Blood calcium is tightly regulated by:

Parathyroid hormone (PTH) – increases blood calcium by bone resorption, kidney reabsorption, and activating vitamin D.

Calcitonin – lowers blood calcium by promoting bone deposition.

Vitamin D (calcitriol) – increases calcium absorption from intestine and kidney.


Bone calcium acts more like a storage bank, while blood calcium must stay in a narrow range (about 8.5–10.5 mg/dL) for normal body function.

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3. How They Are Tested

Blood Calcium Tests

Serum total calcium: Measures both free and bound calcium.

Ionized calcium test: More accurate for clinical decisions (not influenced by albumin).

Normal range:

Total calcium: ~8.5–10.5 mg/dL

Ionized calcium: ~4.5–5.3 mg/dL


Bone Calcium Tests

Direct measurement of calcium in bone is not done routinely. Instead, we assess bone mineral density (BMD) or calcium turnover:

DEXA scan (Dual-energy X-ray absorptiometry): Gold standard for measuring bone calcium/mineral density → used to detect osteoporosis.

Bone biopsy: Rare, for research or specific disease states.

Bone turnover markers (alkaline phosphatase, osteocalcin, urinary calcium): Indirect indicators.


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✅ Summary:

Bone calcium = storage, structure, long-term balance (measured by DEXA).

Blood calcium = active regulator for nerves, muscles, clotting (measured in serum/ionized calcium tests).

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