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Drinking enough water is one of the ways to help prevent kidney stones from forming when supplementing calcium. Photo: Kieu Vu
Drinking enough water is one of the ways to help prevent kidney stones from forming when supplementing calcium. Photo: Kieu Vu

Supplementing calcium to avoid kidney stones: Telling workers the simplest way

Kiều Vũ (Theo AAOS) - báo lao động 28/01/2026 10:15 (GMT+7)

Calcium supplementation is very necessary for workers who do heavy work, work shifts or sit a lot.

Calcium is an essential mineral that helps maintain a strong bone system, supports muscle activity and nerve transmission. For workers, especially those who work hard, on shifts or sit a lot, calcium needs become even more important.

However, improper calcium supplementation can increase the risk of kidney stones formation, seriously affecting health. Therefore, understanding and applying the correct calcium supplementation method is necessary.

To avoid the risk of kidney stones forming when supplementing calcium, workers should prioritize natural foods instead of abusing pills. Safe and easily absorbed calcium sources include milk and dairy products, small fish with bones, tofu, dark green vegetables such as spinach, bok choy.

Calcium from food is often accompanied by other micronutrients that help the body absorb and use it more effectively, and at the same time cause less deposition to form stones compared to using high-dose calcium supplements.

In addition, the combination of calcium with vitamin D plays a key role in preventing kidney stones. Vitamin D helps increase calcium absorption into bones, limiting excess calcium that must be excreted through the kidneys.

Workers should sunbathe early in the morning for 10-15 minutes each day or supplement vitamin D through foods such as eggs and fatty fish. However, it is necessary to avoid arbitrarily using high doses of vitamin D without medical advice.

Drinking enough water is also an important factor in preventing kidney stones when supplemented with calcium. Water helps dilute urine, reducing the risk of calcium crystallization in the kidneys. Workers, especially those working outdoors or in hot environments, need to ensure drinking 2–2.5 liters of water per day, depending on the level of exercise.

It is necessary to pay attention to the time and dosage of calcium supplementation. You should not drink calcium in the late evening because this is a time when the body is less active, easily causing calcium deposition.

Subdividing doses during the day and using them after meals helps increase absorption and reduce the burden on the kidneys. At the same time, limit salty foods and reduce oxalate-rich foods such as strong tea and coffee, as these can increase the risk of stone formation.

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