Still unsure whether to supplement calcium for your family? Today we'll discuss the ins and outs of calcium supplementation.
How to Determine Calcium Deficiency
1. Observe Symptoms: 1) Infants may exhibit excessive sweating, night terrors, irritability, cradle cap, growth retardation, and poor bone calcification. 2) Adolescents or postmenopausal women may experience unexplained back pain, stunted growth, kyphosis, or non-traumatic fractures.3) Seniors may develop osteoporosis, osteomalacia, or bone hyperplasia. 2. Check indicators: 1) Measure serum calcium levels; the adult reference range is 2.1–2.6 mmol/L. 2) Assess bone mineral density (BMD); the normal range is between -1 and 1.
3. Assess dietary intake: Review whether you regularly consume calcium-rich foods such as dairy products, seafood, nuts, and soy products.
Risks of excessive calcium supplementation
Many individuals begin indiscriminate calcium supplementation upon discovering deficiency, unaware that excessive intake carries significant risks without understanding the underlying cause.

1. Excessive calcium intake increases osteoporosis risk. Studies in Western developed countries reveal that calcium supplementation not only fails to effectively reduce osteoporosis-related fractures but conversely raises the risk of hip fractures by 50% in osteoporosis patients consuming high calcium levels.
2. Excessive calcium intake increases the risk of kidney stones. Calcium is not easily absorbed by the body. If too much is consumed but not absorbed, and oxalate-containing substances (found in many vegetables like spinach) are ingested simultaneously, they may combine to form calcium oxalate stones. Larger stones cannot be passed in urine, potentially causing renal colic and, in severe cases, kidney damage.
3. Excessive calcium supplementation increases the risk of cardiac damage. High calcium levels in the blood (hypercalcemia) can accelerate the formation of arterial deposits, leading to ectopic calcification. This ultimately hastens the development of heart disease through atherosclerosis.
4. Excessive calcium supplementation impairs mineral absorption. Nutrient levels in the body require a stable, balanced state to promote mutual absorption; otherwise, the opposite occurs. Studies demonstrate that high calcium supplementation significantly inhibits the absorption of iron, zinc, magnesium, and phosphorus.
Is bone broth effective for calcium supplementation?
What is the primary component in bone broth?Water, of course. Research by Professor Jiang Zhuoqin from Sun Yat-sen University's Department of Medical Nutrition shows calcium concentrations consistently below 2 mg/100 ml. Even using a pressure cooker instead of a clay pot for four hours only marginally increases calcium levels—still not exceeding 4 mg/100 ml.Most lakes in China have calcium levels around 2mg/100ml. In other words, drinking bone broth is no different from drinking high-quality lake water. As for its calcium-supplementing effect—what do you think?
So how should we supplement calcium?
Milk and dairy products are the most important calcium sources. Milk is rich in calcium with high absorption rates, containing about 104mg per 100g.Additionally, legumes, nuts, small fish and shrimp eaten whole (bones and all), and certain green vegetables are also good calcium sources. Hard water contains significant calcium too—so drinking water can help supplement calcium.
Calcium supplements should not be taken indiscriminately. Individuals with high calcium needs during specific life stages (adolescence, pregnancy, menopause) or those unable to meet requirements through regular diet (e.g., milk allergy) may benefit from appropriate supplementation.
Undergo a comprehensive physical examination to determine the cause of calcium deficiency—whether it's primary or secondary, stemming from low calcium intake or reduced absorption due to nutrient deficiencies like vitamin D. This targeted approach ensures effective treatment.