How Much Calcium Do You Need Per Day?
Quick facts: Calcium is essential for bone and teeth health as well as other bodily processes, but making sure you get enough without exceeding limits is key. Getting over 2,500 mg of calcium daily can be dangerous, but this is very hard to do without using supplements incorrectly. Most people can achieve their daily goal of 700 mg of calcium per day through their diet or with appropriate supplement use.
Calcium is an essential nutrient, which means your body cannot produce it on its own and must obtain it through food or supplements. It plays an important role throughout life, helping to support normal bone and tooth maintenance and contributing to several physiological functions.1
Although calcium is often associated with dairy products, it can also be found in a variety of other foods. Understanding how much calcium you need each day can help you to make informed decisions about your diet and determine whether supplementation may be appropriate for your individual circumstances.
Can You Have Too Much Calcium?
Much of the conversation around calcium focuses on getting enough of it, but it’s also possible to consume too much. As with many nutrients, balance is important.
Fortunately, excessive calcium intake is relatively uncommon in those who get their calcium through their food.2 The body has mechanisms that help to regulate calcium absorption, meaning any excess is usually excreted before it can do significant harm.
However, taking high-dose calcium supplements over a prolonged period may increase the likelihood of excessive intake. This is particularly relevant for people who take multiple supplements containing calcium without realising their combined intake.
For most people, maintaining a varied and balanced diet remains the safest way to meet calcium requirements without exceeding them.
How Much Calcium Is Too Much?
According to UK recommendations, adults generally require around 700 mg of calcium per day.1 Requirements may be higher for certain groups, depending on age and health status.
The European Food Safety Authority and other health organisations suggest that intakes significantly above normal requirements may become problematic over time – particularly when daily calcium intake exceeds approximately 2,500 mg per day from all sources.3
To put this into perspective, a standard 200 ml glass of semi-skimmed milk contains approximately 240 mg of calcium.4 This means an adult would need to consume more than two litres of milk in addition to other dietary calcium sources, and do so every day, to approach excessive intake levels through food alone.
For this reason, most cases of excessive calcium consumption involve improper use of supplements rather than dietary sources. Following supplement label instructions and consulting a healthcare professional before taking high-dose calcium products can help to reduce the risk of consuming more than you need.
Should I Take Calcium Supplements?
Most people can get enough calcium through a balanced and varied diet that includes calcium-rich foods such as dairy products, fortified plant-based alternatives, leafy green vegetables, tofu, nuts and seeds.1,4
However, some groups may benefit from additional support. This can include:
- Older adults
- Postmenopausal women
- Individuals who avoid dairy products
- People following restrictive diets
- Individuals with certain medical conditions affecting nutrient absorption.
In these situations, a healthcare professional may recommend calcium supplementation to help support adequate intake.
Before starting a calcium supplement, it’s important to seek professional advice. A healthcare provider can help you to determine whether supplementation is right for you, including whether it may interact with any medications or existing health conditions.
Conclusion
Calcium is an essential nutrient that contributes to the maintenance of normal bones and teeth and supports a range of important bodily functions. Most adults can meet their daily calcium requirements through food alone, making supplementation unnecessary in many cases.
While excessive calcium intake is possible, it’s relatively uncommon without significant supplement use. Maintaining a balanced diet and seeking professional advice when considering supplements can help to ensure you’re getting the right amount for your needs.
FAQs
What Happens If You Have Too Much Calcium?
Consuming excessive amounts of calcium over time, particularly from supplements, may lead to unwanted effects. Some people may experience digestive symptoms such as constipation, while very high calcium levels can affect the body’s ability to regulate other minerals and may place strain on the kidneys.2
Fortunately, excessive calcium intake is relatively uncommon among people who get most of their calcium from food sources.
Why Do We Need Calcium?
Calcium contributes to the maintenance of normal bones and teeth and plays a role in normal muscle function and neurotransmission..1 Because the body can’t produce calcium independently, we have to get it from our food, or from supplements where needed.
Getting enough calcium each day is vital for our bodies’ ongoing physiological needs and is particularly important during periods of growth and ageing, when the bones need extra support.
How Do I Get Calcium Without Dairy?
Although most people associate calcium automatically with dairy, there are actually quite a few non-dairy sources of calcium available. These include:
- Fortified plant-based foods, including some plant milks, yoghurts and cheeses
- Leafy greens like kale, pak choi and broccoli
- Nuts and seeds
- Fortified cereals.4
If you’re following a vegan diet or you’re lactose intolerant, getting enough calcium may need a little more planning, but you should still be able to fulfil your needs without significant difficulty. If needed, supplements can help.
References
(1) NHS. (2023). Vitamins and minerals – Calcium. Retrieved from https://www.nhs.uk/conditions/vitamins-and-minerals/calcium/
(2) National Institutes of Health Office of Dietary Supplements. (2024). Calcium Fact Sheet for Health Professionals. Retrieved from https://ods.od.nih.gov/factsheets/Calcium-HealthProfessional/
(3) European Food Safety Authority. (2015). Scientific Opinion on Dietary Reference Values for calcium. Retrieved from https://www.efsa.europa.eu/en/efsajournal/pub/4101
(4) British Dietetic Association. (2024). Food Facts: Calcium. Retrieved from https://www.bda.uk.com/resource/calcium.html
