Question

Which of the following is the most abundant mineral in the human body?

• A. Mg
• B. Ca
• C. K
• D. Na

Hint:

Calcium = most abundant mineral; key role in bones and muscle function.

Answer 1

The Correct Option is B

Most Abundant Mineral in the Human Body

Minerals are essential inorganic elements that play critical roles in the human body, such as in bone structure, fluid balance, and enzyme function. To determine the most abundant mineral, let's evaluate the provided options.

Magnesium (Mg)

Magnesium is involved in muscle function, nerve transmission, and enzyme activity. It constitutes about 0.05% of body weight, primarily in bones and soft tissues.

Calcium (Ca)

Calcium is the primary mineral in bones and teeth, also playing a role in muscle contraction and nerve signaling. It accounts for approximately 1.5–2% of body weight, making it the most abundant mineral.

Potassium (K)

Potassium is crucial for fluid balance, nerve function, and muscle contractions. It makes up about 0.2% of body weight, mainly in intracellular fluids.

Sodium (Na)

Sodium regulates fluid balance and nerve function, constituting about 0.15% of body weight, primarily in extracellular fluids.

Why Calcium is the Correct Answer

Calcium is the most abundant mineral in the human body, comprising approximately 1.5–2% of total body weight. About 99% of calcium is stored in bones and teeth, with the remainder in blood and tissues for physiological functions.

Comparison of Minerals

Mineral	Approximate Percentage	Primary Role	Main Location
Calcium (Ca)	1.5–2%	Bone/teeth formation, muscle function	Bones, teeth, blood
Magnesium (Mg)	0.05%	Enzyme function, muscle/nerve activity	Bones, soft tissues
Potassium (K)	0.2%	Fluid balance, nerve function	Intracellular fluids
Sodium (Na)	0.15%	Fluid balance, nerve function	Extracellular fluids

Practical Examples

• Calcium: Forms the structural basis of bones and teeth; deficiency can lead to osteoporosis.
• Magnesium: Supports over 300 enzymatic reactions, including energy production.
• Potassium and Sodium: Maintain electrolyte balance, critical for heart and muscle function.

Final Answer

The most abundant mineral in the human body is Calcium (Ca).