3 min readNew DelhiFeb 4, 2026 07:00 PM IST
Many individuals take Vitamin D tablets, believing they are sufficiently supporting their bone health. However, according to Dr. Anup Khatri, Senior Consultant – Orthopaedics at Gleneagles Hospital in Parel, Mumbai, Vitamin D is most effective when combined with another vital nutrient: calcium. “Vitamin D facilitates the body’s absorption of calcium. Without an adequate calcium supply, Vitamin D alone cannot enhance bone strength or prevent deterioration. Hence, these supplements are often prescribed together. Always follow your doctor’s advice regarding dosage,” Dr. Khatri explains.
Simply put, Vitamin D acts as a facilitator, aiding in calcium absorption. Yet, if calcium levels are insufficient, there is nothing for Vitamin D to help absorb in the first place.
Can Vitamin D alone strengthen bones?
Many people question if Vitamin D on its own is adequate. Dr. Khatri clarifies: “While Vitamin D enhances calcium absorption, it cannot strengthen bones without sufficient calcium in the body. Calcium is essential for the formation of bone structure. Therefore, both nutrients are crucial for robust bones. It’s advisable to consult an expert for guidance.”
Bones fundamentally rely on calcium as their building block. Without it, the bone structure cannot properly form, irrespective of the amount of Vitamin D consumed.
Calcium is essential for bone structure formation (Image: Pexels)
Is taking only Vitamin D less effective?
The brief answer is yes. According to Dr. Khatri, “Taking Vitamin D by itself can be less effective due to a potential lack of available calcium to strengthen the bones. Vitamin D aids in calcium absorption, but calcium is required for building and maintaining bone strength. This is why doctors typically recommend both Vitamin D and calcium supplements for bone health.”
This explains the common practice of prescribing both nutrients together rather than Vitamin D alone.
Are there risks without enough calcium?
Yes, indeed. “Insufficient calcium can render Vitamin D ineffective in promoting bone strength and may accelerate bone loss over time. This decline can significantly impact one’s quality of life. Therefore, it’s critical to prioritize your bone health immediately!” Dr. Khatri warns.
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Over time, weakened bones can lead to decreased mobility, strength, and overall well-being, emphasizing the need for appropriate supplementation.
What’s the right balance?
Regarding dosages, Dr. Khatri advises, “For most adults, a suitable combination is 1,000 mg of calcium with 800 IU of Vitamin D, as guided by a doctor based on individual age and health needs. Always adhere to the physician’s recommended dosage, which will also include guidance on frequency of intake.”
The essential takeaway is straightforward: Vitamin D and calcium work together synergistically. One facilitates absorption, while the other is crucial for building and maintaining bone strength. It is vital to take them in combination and strictly as directed by a healthcare professional for optimum bone health.
DISCLAIMER: This article is based on information from the public domain and/or the experts we consulted. Always consult your health practitioner before starting any routine.
