If you’re interested in supporting bone health, healthy ageing or better sleep, you’ve probably wondered whether calcium and magnesium should be taken together.
The short answer is yes.
Calcium and magnesium work closely together within the body and both play important roles in bone health, muscle function and overall wellbeing.
However, many people also want to know:
- Can you take calcium and magnesium at night?
- Is it better to take them in the morning or evening?
- What is the ideal calcium-to-magnesium ratio?
- Do you need a calcium supplement at all?
In this guide, we’ll answer these common questions and explain how calcium, magnesium and other key nutrients work together to support healthy bones and ageing.
Can you take calcium and magnesium together?
Yes, calcium and magnesium can be taken together.
In fact, these minerals work in partnership throughout the body but you do not necessarily have to eat them at the same time of day. In fact for the best absorption it is often better to have them at different mealtimes or spaced out over the day.
Calcium and magnesium compete for the same absorption pathways through your digestive tract. Taking them apart prevents ensures maximum benefits.
Calcium helps support:
- Bone strength
- Muscle contraction
- Nerve signalling *
- Blood clotting
Magnesium helps support:
- Muscle relaxation
- Energy production
- Nervous system function
- Bone health
You can think of calcium and magnesium as a balancing act. Calcium helps muscles contract, while magnesium helps them relax. Both are essential for normal function and healthy ageing.
What is the best time to take calcium and magnesium?
One of the most common questions people ask is whether calcium and magnesium should be taken in the morning or at night. The answer depends on your goals.
Taking calcium and magnesium in the morning
Morning supplementation may suit people who:
- Prefer taking supplements with breakfast
- Split their supplements throughout the day
- Take larger doses of calcium
Some research suggests calcium is absorbed most efficiently when taken alongside food.
Taking calcium and magnesium at night
Many people choose to take magnesium in the evening. This is because magnesium contributes to:
- Normal nervous system function
- Normal muscle function
- Reduced tiredness and fatigue
So which is best?
If your primary goal is supporting relaxation, recovery and healthy ageing, many people choose the evening supplementation for taking a magnesium supplement.
However, consistency matters more than timing.
The best time to take supplements is the time you are most likely to remember them.
Is taking calcium and magnesium at night beneficial?
Calcium can be taken at any time of the day. However as magnesium helps you to relax many people choose to take it in the evening:
- Bone health
- Muscle relaxation
- Healthy sleep routines
- Recovery
It’s important to remember that bones are not static structures. Bone remodelling is an active process that continues throughout life and much of the body’s repair activity occurs during sleep. This is one reason why many people choose to focus on supportive nutrients in the evening.
What is the ideal calcium to magnesium ratio?
The calcium-to-magnesium ratio is a frequently searched topic, but there is no universally agreed “perfect” ratio.
Historically, some experts suggested a ratio of approximately: 2:1 calcium to magnesium
For example:
- 1000mg calcium
- 500mg magnesium
However, modern nutrition research increasingly recognises that overall dietary intake matters more than achieving a specific ratio.
Many people consume plenty of calcium through foods such as:
- Dairy products
- Sardines
- Tofu
- Leafy greens
- Fortified foods
Magnesium intake, however, is often lower than recommended. This is one reason why many bone health experts now focus on ensuring adequate magnesium intake alongside a calcium-rich diet.
Do you need a calcium supplement?
Not necessarily. Many people can meet their calcium requirements through food. Good dietary sources include:
- Milk
- Yoghurt
- Cheese
- Tinned fish with bones
- Kale
- Broccoli
- Fortified plant milks
The question is often not simply whether you are consuming enough calcium, but whether your body has the nutrients required to use it effectively. This is where magnesium and other bone-supportive nutrients become important. Why Magnesium Matters for Bone Health Around 60% of the body’s magnesium is stored in the skeleton. Magnesium plays a role in:
- Bone mineralisation
- Vitamin D metabolism
- Calcium regulation
- Muscle function
Without adequate magnesium, the body may struggle to utilise calcium effectively.
This is why magnesium is increasingly recognised as an essential nutrient for healthy ageing and bone support.
Magnesium and sleep
Magnesium has become one of the most popular nutrients for supporting relaxation and healthy sleep routines.
Magnesium contributes to:
- Normal psychological function
- Normal nervous system function
- Reduced tiredness and fatigue
For this reason, many people choose to take magnesium in the evening as part of their bedtime routine. Supporting sleep is important not only for recovery and wellbeing, but also for healthy ageing. It also aids with calcium absorption into the bones while we are sleeping.
You may also enjoy reading our guide:
The Importance of Sleep and Recovery for Healthy Ageing
Looking beyond calcium: a modern approach to bone health
For many years, bone health discussions focused almost exclusively on calcium. Today, we know that healthy bones depend on a much broader range of nutrients.
These include:
- Magnesium
- Vitamin D3
- Vitamin K2
- Silicon
- Boron
- Protein
- Collagen
These nutrients help support the processes involved in maintaining strong, healthy bones throughout life.
Supporting bone health with Advanced Bone Complex
At Rejuvenated, we developed Advanced Bone Complex around a modern understanding of bone health.
Rather than focusing solely on calcium, Advanced Bone Complex provides key nutrients involved in bone metabolism and healthy ageing, including:
- Magnesium glycinate
- Vitamin D3
- Vitamin K2
- Silicon
- Boron
- Vitamin C
The formula is designed to complement a healthy diet that includes calcium-rich foods while providing the cofactors needed to support bone health, muscle function and overall wellbeing.
Take Advanced Bone Complex in the evening to support your body’s natural overnight recovery processes. The formula is designed to work alongside your circadian rhythm, helping to support bone health and relaxation before bed.
How to get a more restful night's sleep.
Frequently asked questions
Can you take calcium and magnesium together?
Yes. Calcium and magnesium work together throughout the body and can be taken together as part of a healthy diet and supplement routine.
Is it better to take calcium and magnesium at night?
Many people choose to take magnesium in the evening because it supports muscle and nervous system function. However, consistency is more important than timing.
What is the best calcium-to-magnesium ratio?
Historically, a 2:1 ratio has often been suggested, although modern research places greater emphasis on overall dietary intake and nutrient balance.
Can magnesium help with sleep?
Magnesium contributes to normal nervous system function and helps reduce tiredness and fatigue, which is why many people include it in their evening routine.
Do I need calcium supplements for bone health?
Not necessarily. Many people obtain sufficient calcium through food. Bone health also depends on nutrients such as magnesium, vitamin D3, vitamin K2, silicon and boron.
The Bottom Line
Yes, calcium and magnesium can be taken together, and many people choose to take them in the evening as part of a healthy ageing and bone health routine.
However, supporting healthy bones is about more than calcium alone.
A balanced diet rich in calcium-containing foods, combined with nutrients such as magnesium, vitamin D3, vitamin K2 and silicon, can help support strong bones, muscle function and wellbeing throughout life.
