Calcium Deficiency: Why Calcium Matters and How to Get Enough
Why Calcium Matters in the Body
Calcium is the most abundant mineral in the human body, and it does far more than build bones and teeth. It plays a role in normal muscle contraction, in transmitting nerve signals, in normal blood vessel and circulatory function, and in the release of certain hormones and enzymes. Because it’s involved in so many everyday processes, getting enough calcium consistently is one of the more important things you can do for long-term wellbeing.
The challenge is that even though calcium is found in many common foods, a large share of adults fall short of the recommended daily intake — through diet alone, changing absorption with age, or dietary patterns that limit the usual sources. (For the bigger picture on minerals, see what trace minerals are.)
What Affects How Much Calcium You Need
Calcium needs aren’t the same for everyone. Several groups tend to need more attention to their intake:
● Postmenopausal women — hormonal changes can affect how efficiently the body absorbs and retains calcium.
● Older adults — calcium absorption in the intestine tends to become less efficient with age.
● People on dairy-free or limited diets — dairy is a major dietary source, so excluding it without good substitutes can make adequate intake harder.
● People with certain digestive conditions — some conditions affect how well nutrients are absorbed; a healthcare provider can advise here.
● People on certain long-term medications — some medications can affect calcium status over time. Check with your provider.
If you’re concerned about your calcium status, the reliable way to know is a simple blood test from your healthcare provider — not a self-assessment. We make supplements, not diagnoses, and persistent symptoms of any kind are worth discussing with a professional.
The Best Food Sources of Calcium
A calcium-rich diet is the foundation. Good sources include:
● Dairy foods — milk, cheese, and yogurt
● Leafy greens — kale, bok choy, and broccoli
● Fish with edible bones — sardines and canned salmon
● Fortified foods — many plant milks, cereals, and orange juice
● Nuts and seeds — almonds and chia seeds
Aim for the recommended dietary allowance (RDA) for your age and sex, which a quick search or your provider can confirm.
When a Calcium Supplement Helps
If your dietary intake falls short — or you’re in one of the groups above — a supplement can help you reach your daily target. The two most common forms are calcium carbonate and calcium citrate. Vital Earth Minerals Cal-Mag (Calcium Magnesium Liquid) is a bioavailable liquid option that supports normal bone, muscle, and nerve function and overall mineral balance — a good fit for people who prefer a liquid over tablets, or who simply want a well-absorbed daily source. (Why liquid form matters for calcium: liquid calcium benefits.)
A 2023 randomized crossover study in Frontiers in Nutrition found that calcium citrate in pre-acidified liquid form supports ready absorption without requiring stomach acid for conversion. Read the study. We reference research on calcium and minerals as compounds; it does not reference our products specifically. Browse more in our research library.
Calcium Works Best With Its Partners
Calcium doesn’t work in isolation. Vitamin D supports the body’s ability to use calcium, and magnesium works alongside calcium in muscle and nerve function — which is why Cal-Mag pairs the two. Sensible sun exposure, vitamin-D-rich foods, and adequate magnesium all support how well your body puts calcium to use. (More on magnesium’s role: magnesium and digestive health.)
Lifestyle That Supports Healthy Calcium Status
Weight-bearing movement — walking, jogging, resistance training, or yoga — supports strong bones and is one of the best complements to adequate calcium intake. It also helps to keep alcohol, caffeine, and sodium moderate, since very high intakes can increase calcium loss through the urine. As with most things, balance and consistency matter more than any single habit.
Frequently Asked Questions
How much calcium do I actually need each day?
It depends on age and sex — most adults fall in the 1,000-1,200 mg/day range, but check the current RDA for your situation or ask your provider. Aim to get as much as you can from food, and use a supplement to fill the gap if needed.
Should I take calcium and magnesium together?
Many people find a combined calcium-magnesium supplement convenient, since the two minerals work together in muscle and nerve function. Cal-Mag is formulated with both in a bioavailable liquid form.
Is liquid calcium better absorbed than tablets?
Liquid calcium is already in solution, so it doesn’t need to dissolve before absorption can begin — an advantage for people with lower stomach acid or who find tablets hard to digest. See liquid calcium benefits for more.
How long before a supplement makes a difference?
Mineral status shifts gradually with consistent daily intake. If you have a specific concern about your calcium level, a blood test from your provider is the way to track it accurately over time.
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
Vital Earth Minerals makes nutritional supplements; we are not doctors or healthcare practitioners, and nothing here is medical advice. Always consult your physician or a qualified healthcare practitioner before beginning any supplement — particularly if you are pregnant or nursing, taking medication, or managing a health condition.