magnesium supplements reviews


Magnesium Supplement Reviews

Magnesium is an important mineral for our health as it is involved in over 300 biochemical processes. When our magnesium levels run low, several health conditions may arise. Magnesium deficiency can cause vomiting, muscle pain and anxiety. A great way to increase magnesium levels is to use a magnesium supplement. But, how do you know what supplement to take? ​

Here you will find up-to-date guides and reviews of magnesium supplements to help you make an informed decision of what to buy.

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More Info On Magnesium Supplements....​


Magnesium supplements offer an array of benefits for the body. Magnesium taken orally is an effective method of boosting the levels of magnesium within your body. If you’re suffering from a deficiency, using a magnesium supplement is highly recommended.

Oral supplements travel down through the digestive system, where they’re broken down by stomach acids before being absorbed. Every individual has varying absorption levels and while it’s possible to consume too much magnesium, excess levels are excreted by the kidneys, so you don’t suffer the effects of toxicity.

The Differing Types​

Magnesium supplements are offered in various forms. There are capsules, liquid and powder. The formulation will differ depending on the brand you purchase, as well as the amount of magnesium within the supplement.

  • Mineral salts – This form is usually found in the sea or nature and includes magnesium chloride, oxide and sulfate.
  • Magnesium chloride – The form of magnesium with the highest bioavailability, magnesium chloride is effective in purifying tissues and detoxifying cells. Chloride is required by the body to produce gastric acid and it fuses with hydrogen to produce hydrogen chloride in the stomach. This digestive enzyme breaks down proteins and absorbs other minerals. With no chloride in the body, muscle movement and correct kidney function are reduced, therefore, magnesium chloride is highly important.
  • Magnesium oxide – This is one of the least absorbable forms of magnesium, so it’s not recommended for increasing the levels of magnesium in your body.
  • Magnesium acid complexes – These supplements include magnesium that is bonded with acids in a lab environment. These compounds are not formed from food or plants and normally include magnesium malate, magnesium gluconate, and magnesium citrate.
  • Magnesium chelates – Chelated magnesium is formed when magnesium is bonded to an amino acid including nitrogen. This type of supplement tends to be more expensive due to the chemical processes needed to produce the chelated magnesium. Magnesium chelates are easily absorbed by the body and include magnesium glycinate, magnesium lysinate and magnesium taurate.

Types of Magnesium

​For more information on the different forms of magnesium you can buy and what is best depending on symptoms please check out our guide here.

best form of mg

Magnesium Supplement Uses

While you can purchase transdermal types of magnesium to be applied topically, magnesium supplements taken orally can be bought in tablet form, powder or liquid. The type you buy will depend on your preferences. If you prefer taking traditional forms of supplement,then tablets or capsules will be the form for you.​

You may need to consume one to three tablets daily, depending on the brand and strength of magnesium in each tablet. Adults require between 300 – 400mg of magnesium daily in order to avoid a deficiency (1), so ensure you check how much magnesium is supplied.

In powder form, the supplement is normally mixed with water and then consumed as a beverage. This type of magnesium is perfect for those who struggle to consume tablets, as well as being cost effective. Many brands offer flavoured supplements to make it enjoyable to take.

Liquid form can be consumed from a spoon, just ensure that you’ve checked how much you need to take as it will differ between brands. Liquid magnesium is absorbed more easily than tablets as the magnesium is already dissolved. This type is ideal for children.

What Magnesium Supplements Do

For Relaxation

Magnesium supplements help to alleviate stress, anxiety and tension to allow for a better night’s sleep. Taking a magnesium drink an hour before bed is perfect for helping you to unwind, so you can achieve several hours sleep. This will help to improve energy levels and fatigue as you’ll feel much fresher and brighter.

For Muscles​

Muscle aches and pains is one of the main symptoms of a magnesium deficiency. To relieve muscle spasms and soreness, take your magnesium supplement daily. As your magnesium levels start to increase, the pain will begin to subside. If you partake in lots of exercise, magnesium supplements are recommended.

For Calcium Regulation​

Some magnesium supplements contain calcium as magnesium helps to transport it to cell membranes. Both calcium and magnesium are highly important for bones; at least 60% of magnesium within your body is stored within your bones.

For Digestion​

Magnesium helps to relax your muscles to relieve constipation. Furthermore, it neutralises acid within the stomach and boosts your overall digestive system.

For Kids​

While they may be young, children still need to consume magnesium. Between the ages of birth to 13 years of age, children need 30mg to 240mg daily, depending on their age​. Children can be hard to please when it comes to diet, so getting them to eat foods rich in magnesium, such as green leafy vegetables and bananas may be challenging.

A magnesium supplement is perfect as it will help your child to avoid a deficiency. As children may struggle to take capsules or tablets, consuming liquid magnesium or a drink is highly recommended. Liquid, especially, is easily absorbed and will boost magnesium levels quickly.

For Energy Levels​

Magnesium helps to produce energy within the body by activating the ATP. This alleviates fatigue and will improve your overall mood as you’ll have more energy to participate in exercise.

For Heart Health​

Magnesium is essential for a healthy heart. The largest amount of magnesium within your body (other than that stored in your bones) is within your heart. Furthermore, magnesium works in unison with calcium to prevent hypertension and support blood pressure.

For Migraines​

Magnesium is involved in blood circulation and assists in the release of hormones that reduce pain. This helps to alleviate migraines and bad headaches.

For Diabetes​

Studies have shown that magnesium has been linked to playing a role in diabetes. Those with low levels of magnesium are reported to have elevated insulin levels​.

Magnesium is thought to protect against type 2 diabetes, as well as regulating glucose. Therefore, it’s important to ensure that you’re consuming the recommended daily amount of magnesium for your age and sex.

Side Effects Of Magnesium Supplements

Magnesium supplements have minimum side effects. Some people who use magnesium supplements like tablets for the first timesuffer from an irritated stomach or diarrhoea. If this occurs, reduce your dosage.

Taking excess magnesium is not advised. Magnesium overdose is very rare but it can happen if your take too much magnesium. Remember to consider your diet when taking supplements as the magnesium from your food intake counts towards your recommended daily intake.

Magnesium supplements should not be taken by people with regular loose bowel movements, specific heart conditions or if you suffer from kidney trouble.

Some medications can also interact with magnesium supplements. Antibiotics, bisphosphonates, muscle relaxants, medication for high blood pressure and water pills can all be affected as magnesium can cause them not to work adequately. Make sure you consult your doctor before taking any supplement if you’re on any medication.

Do Magnesium Supplements Really Work?

Magnesium supplements are known to increase levels of magnesium within the body. Studies have demonstrated that many people taking supplements receive more than the recommended daily amount of magnesium (​1). Liquid magnesium tends to be better absorbed by the body as its already been dissolved. 

Oral supplements also contain a higher amount of magnesium than topical forms, so it’s best to check the amount before you consume. However, you have to remember that oral supplements need to travel through the digestive system,where some of it will be eliminated by the kidneys as waste.

Some studies have shown that high levels of magnesium can lower the risk of heart disease (​2). Furthermore, an extra 100mg of magnesium per day can decrease the risk of a stroke (​1). While a healthy diet can provide the recommended daily amount of magnesium, taking a supplement will help to give your body the higher levels to offer this protection.

It’s difficult to consume too much magnesium, unless you suffer from specific health conditions like kidney problems. Therefore, be reassured that taking a magnesium supplement is massively beneficial for your health.

Where To Buy Magnesium Supplements

Magnesium supplements can be purchased from grocery stores, health stores, chemists and online shops. The best place to purchase online is Amazon, where you can select from varying products and brands.

​Picking A Supplement To Buy:

Picking a magnesium supplement can be quite the mind field.  So to help you on your way we have created a guide.  ​You can find this information here.

best magneisum supplements

More Information​

We have many resources on the site to help you in your quest to know everything there is about Magnesium​.  We also have a health supplement review section if there are other supplements you are interested in.

Everything You Ever Wanted To Know About Magnesium

magnesium guide

Our bodies require many minerals and nutrients to function properly. One important mineral is magnesium. Surprisingly, you may have heard little about its health benefits and why magnesium deficiency can promote so many problems. So, what exactly is magnesium and why is it so vital for our wellbeing? Here is a comprehensive guide to this magnificent mineral.

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magnesium salt

What Is Magnesium?

Magnesium is a chemical element found within human cells. You’ll also find it in plant matter, as a rock salt (magnesium carbonate) and as magnesium chloride which is found within the sea.

What Does Magnesium Do To The Body?

The human body is composed of elements that provide the foundations of tissues, fluids and factors that regulate how the body functions. Minerals like magnesium, calcium and potassium are required in large amounts.Adults have around 25g of magnesium present in their bodies with up to 60% in the bones alone. The rest is mainly found in soft tissues (1).

Magnesium is involved with over 300 biochemical processes in the body and assists in the growth of bones, nerves and muscle function, as well as helping to neutralise stomach acid. Furthermore, it aids the production of energy, the control of blood glucose levels, and cell formation.

How Much Magnesium Do We Need?

The recommended daily allowance generally depends on age. From food and supplements, a child aged 3 and under should consume 80mg of magnesium. Between 4 to 8 years, the amount rises to 130mg per day and between 9 to 13yrs, the daily intake is 240mg.

Between 14-18 years old, the intake for a female significantly increases to 360mg daily and at 19 to 30, you should be consuming 320 mg each day. Women aged over 31 and over require 310mg. Pregnant women require slightly more; between 350 to 400mg of magnesium is recommended daily.

Males need 400 to 420mg of the mineral each day, depending on age (2).

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Recommended Daily Intake

3 and Under


4 to 8 years


9 to 13 years


14 to 18 years (Female)


19 to 30 years (Female)


31 and Over (Female)



350mg to 400mg


400 to 420mg

Signs Of Deficiency

A low level of magnesium is something that affects many and often goes undetected due to the difficulty in diagnosis. Normal levels of magnesium within the blood are generally 1.7 to 2.2 mg/dl. In cases where deficiency is present, this level is 1.7mg/dl and under (3).

There are several signs of magnesium deficiency and it normally affects the majority of functions within the body. These include;

nausea and magnesium


Nausea is often one of the first signs of magnesium deficiency. This can appear in the form of morning sickness, vomiting, cramps or a poor appetite. Interestingly, even anorexia has been linked to low levels on magnesium within the body due to the weight loss associated with lack of appetite and sickness.

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Decreased Energy Levels

Feeling tired, fatigued or run down is often a symptom of low magnesium levels. As magnesium is involved in over 300 enzyme reactions, it has a key role in many bodily functions, including the creation of energy. Magnesium is needed for the body to create and store energy that is required on a daily basis. When your body has sufficient levels of magnesium, a constant supple of energy is distributed, ensuring you feel active and refreshed. You have the energy to go about daily life in a positive manner without feeling exhausted and you can participate confidently in physical exercise. A recent study (4) signified that an increase in oxygen occurs during physical activity when magnesium levels are low. Even people with athletic ability use more energy than they would if their bodies had higher levels of magnesium.

depression and magnesium


Magnesium deficiency has long been associated with anxiety and depression (5). Magnesium essentially stops excess levels of calcium and glutamate, which are toxic to cells, from damaging neurons. When magnesium levels are low, this prevention decreases, meaning cells may eventually die.

When present in sufficient levels, magnesium suppresses a hormone called ATCH; the very hormone that causes the stress hormone cortisol and adrenaline to be released. Magnesium prevents such hormones entering the brain, thus, your reactions to stress, depression and anxiety are reduced. If there are limited amounts of magnesium within the body, your reactions are increased and as a result, you suffer from anxiety and mental health problems.


Studies (6) have indicated that increased magnesium levels assist in relaxation, helping you to sleep better. A reduction in mental health problems, such as anxiety also promotes a good night’s sleep. Low levels of magnesium are likely to increase insomnia, therefore, increasing fatigue and tiredness.

Muscle Cramps

Magnesium deficiency can cause the muscles to become weak and stiff due to hyper responsive neuromuscular activity. This also results in muscle cramps.

Hormonal Problems

Magnesium levels fluctuate during a menstrual cycle, especially towards the second half when magnesium levels rapidly plummet. High magnesium levels can aid symptoms of PMS, such as stomach cramps and headaches. In pregnant women, increased magnesium levels are required to limit the risk of preeclampsia and premature birth. Up to 400mg of magnesium is recommended each day for pregnant women.

Weak Bones

Like calcium, magnesium is essential for strong, healthy bones. Magnesium aids the absorption of calcium and stimulates the production of calcitonin, which maintains a healthy bone structure. Magnesium also transforms vitamin D into an active form, preventing osteoporosis from occurring and promoting healthy bones. 60% of magnesium within the body is stored within the bones and transferred from the bone into the blood stream when needed. For this level of magnesium to be at optimum level, you should consume the recommended amount of magnesium daily.

Deficiency of Minerals

Minerals and nutrients work in combination to provide correct functioning within the body. Magnesium is essential for the consumption of a range of vitamins and minerals, including vitamin D and calcium. Without magnesium, these minerals are not correctly absorbed by the body, leading to a host of health problems.

High Blood Pressure

A low level of magnesium poses an increased risk of suffering with hypertension. Upping your intake of magnesium can help to reduce high blood pressure, however, studies have demonstrated that results can vary (7).

yoga for stress heart

Heart Problems

Low magnesium has been linked to heart problems (8). Magnesium transports calcium and without it, too much calcium inhibits cells which leads to heart problems. Excessive calcium levels are only one cause of heart disease, however, increasing your intake of magnesium assists with preventing blood clots and the calcification of arteries, helping to reduce the risk of having a heart attack.

Other Health Effects Of Magnesium Deficiency

Magnesium deficiency has also been linked to the development of diabetes (9), constipation, sensitivity to noise, poor co-ordination, headaches and allergies.

Who Is More At Risk?

Several people are more at risk from suffering from low levels of magnesium. These include;

Those Taking Medication

Certain types of drugs can reduce magnesium levels by promoting magnesium loss via excretion by the kidneys. Such drugs can include heart medication and birth control pills.

Those Drinking Caffeinated Drinks

As magnesium levels are largely controlled by the kidneys which excrete excess minerals, drinking caffeine drinks on a daily basis, such as tea and coffee, can promote increased levels of magnesium loss. This is because caffeine causes the kidneys to excrete more minerals.

Alcohol Drinkers

Alcohol acts as a diuretic by increasing the excretion of magnesium. Studies have demonstrated that magnesium deficiency has been found in 30% of alcoholics (10).

Those Who Have Undergone Surgery

Stressful situations like surgery or other medical procedures can cause depleted magnesium levels. As these stressful situations require more magnesium to be used by the body, a deficiency can be triggered.

Those Consuming Carbonated Drinks

Dark coloured carbonated drinks contain phosphates which bind with magnesium in the body, making it unavailable for functional use. Drinking carbonated drinks on a regular basis will significantly reduce magnesium levels.

Those Who Consume Sugar

Refined sugar is another product that causes the kidneys to excrete more magnesium than necessary. Furthermore, sweet food contains no nutritional goodness, meaning if you consume large amounts, you’re likely to suffer from low levels of minerals and vitamins within your body.

Those Taking Calcium Supplements

If you have low levels of magnesium, calcium supplements can cause a reduction in absorption and retention. Interestingly, despite the effects calcium supplements can have on magnesium levels, magnesium supplements actually increase the use of calcium in the body. If you’re consuming calcium and magnesium joint supplements, consider at least a 1:1 ratio as this will help to improve bone health and reduce the risk of calcification in the arteries.

Older Adults

Older adults are likely to suffer from magnesium deficiency as ageing and poor health require higher levels of the mineral to be consumed. The body may also absorb and retain less magnesium as you grow older, meaning you need to intake larger amounts.

What Conditions Can Benefit From Magnesium?

Magnesium offers many health benefits, however, several conditions can benefit from high levels.


As magnesium assists with calcium absorption for healthier bones, consuming recommended daily amounts of magnesium can improve bone structure and help those suffering with osteoporosis.


Magnesium deficiency has been associated with an increased risk of developing diabetes (11). Magnesium aids carbohydrate metabolism and insulin activity to control blood glucose levels. Studies have demonstrated that with every 100mg of increase in the daily intake of magnesium, the risk of developing type 2 diabetes decreases by 15 percent (12).


Increasing your magnesium levels helps to reduce psychiatric issues like depression, anxiety, insomnia and migraines.

Heart disease

Increased magnesium levels can reduce the risk of having a stroke, abnormal heart rhythms and heart attack. It can also assist in regulating blood pressure, so consuming higher levels of magnesium is recommended for those suffering from heart disease.

What Foods Are Magnesium In?

Most people consume less than 250 mg of magnesium from food. However, several foods are rich in magnesium, including:


Amount per 100g Serving

Nuts and Seeds


Dark Chocolate




Soy Beans


Dark Leafy Greens




Brown Rice






What To Do If You Think You’re Deficient?

As magnesium is so crucial for good health, it’s important to consume the recommended daily amount for your age and sex. It’s difficult to diagnose low levels of magnesium with precision, due to the fact that the symptoms of deficiency can be linked to many other heath conditions. Furthermore, only a low level of magnesium is present in the blood as the majority is stored in the bones. This makes it incredibly challenging to detect a deficiency and why low levels of magnesium are often considered to be an invisible heath condition.

Magnesium deficiency occurs in humans for many reasons. Crops suffer from lower magnesium levels due to soil depletion, magnesium is lost via regular bodily functions like muscle use and hormone production, and digestive problems can lead to low absorption rates. Thus, it’s no surprise that magnesium is the second most abundant element in the human body.

So, What Can You Do If You Think You’re Deficient?

If you’ve been suffering from one or more of the symptoms associated with magnesium deficiency, then it’s time to take action. Early signs of deficiency may include feeling sick, cramps, fatigue and headaches. Luckily, there are several things you can do to increase the magnesium levels in your body.

First, you need to increase your intake of foods rich in magnesium. Ensuring a balanced diet, with foods containing magnesium and limiting your intake of sugar, carbonated drinks and alcohol, which are known to decrease magnesium levels will improve your overall health. Furthermore, avoid consuming foods that are stripped of their magnesium content like refined, processed foods. You can also try consuming fermented food and drinks that contain prebiotics; good bacteria and yeast. These help the body to absorb more magnesium from the foods you eat.

Those with severely depleted levels of magnesium, in which vomiting, rapid heartbeat and low calcium levels can occur, can consider magnesium injections. Magnesium sulfate is often prescribed for hypomagnesemia, as well as an abnormal heart rhythm. It’s generally prescribed for adults to inject every six hours (4 doses) or administered as an IV drip over 3 hours, depending on the severity of the hypomagnesemia. However, magnesium sulfate injections do have side effects, including sweating, flushing, low blood pressure and lowered body temperature.

Magnesium supplementation

magnesium supplement

Who Should Supplement?

Magnesium supplements are an ideal method of effectively increasing your magnesium levels. As it’s hard to detect magnesium deficiency, it’s difficult to detect levels of the mineral in the body. The most common way is to measure serum magnesium concentrations in blood, though as the blood only contains a small amount of the magnesium present in your body, no test can be conclusive.

Many experts suggest that you should take supplements as there are little side effects from them (13). Regular supplementation will help to raise magnesium levels and promote good health, including reducing or eliminating any symptoms of deficiency that you may be suffering from. If you’re on medication, check with your doctor before using any supplement as they may counteract with each other.

There are varying forms of magnesium supplements and in general, the rate of absorption depends on the type you’re taking. Liquid is absorbed better as it is less soluble and its thought that forms of chloride, citrate and chelate are better absorbed by the body than magnesium supplements in sulfate or oxide form. The overall magnesium supplements you’ll generally find are:

  • Magnesium Glycinate – Taken via a tablet or powder (mixed with juice or water), this supplement is easy to absorb by the body than many other forms and has very minimal side effects. It is recommended for anyone with magnesium deficiency.
  • Magnesium Chloride Oil – This form of magnesium is perfect for anyone who doesn’t enjoy consuming oral supplements. Magnesium oil is applied over the skin. It is quickly absorbed as it bypasses the kidneys which eliminates much of your magnesium intake as waste. Magnesium chloride oil is suggested for those with digestion problems, who struggle to absorb the mineral from food. Some athletes also apply magnesium oil to heighten their energy levels and prevent muscle cramps.
  • Magnesium Chelate – While this form of magnesium is found naturally in foods, in supplement form its job is to restore levels of the mineral within the body. It is easy to absorb and binds to amino acids.
  • Magnesium Citrate – This form of supplement combines magnesium with citric acid. When taken in high doses, it may produce a laxative effect, but in regular doses, it helps to prevent constipation and improve digestion.
  • Magnesium Threonate – This form has a high level of absorbability, however, it is not as available as other types of supplement.
  • Ionic Magnesium – ionic magnesium is taken orally to ensure absorption is at maximum level. The body recognises magnesium in an ionic state easily,so it’snot required to be broken down by the stomach, therefore, increased absorption in the intestine takes place.
  • You can also find magnesium in gel, bath flake or drink form, along with oil, tablets and powder.


For more info on Magnesium Supplements and their benefits please click here: Magnesium Supplements

For more information on the best form of magnesium click here: Best Form Of Magnesium​

If you want to know what supplements are good, you can also have a look at our Best Magnesium Supplements article.​

How Much Magnesium Should I Take Per Day?

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You should refer to the recommended daily intake for your sex and age when considering purchasing magnesium supplements. Everyone requires a different amount so this needs to be taken into consideration. For adult women, the required amount is on average 300mg, whereas for men, an average of 400mg is needed. Pregnant women need up to 400mg daily, while children require considerably less than adults.

The recommended daily amount is designed to be the minimal level needed to prevent deficiency occurring. Therefore, it is not necessarily the optimal level for your individual needs.

If you are an adult, start with a 300mg or 400mg (depending on whether you’re female or male) split into two doses and take one in the morning and one later on in the day (14). It’s best to follow the guidelines for your recommended daily amount to begin with.

If you suffer from deficiency, many experts suggest taking a higher dosage, though it’s best to see how your body reacts to the recommended amount first. Remember to take your diet into account, especially if you consume many foods rich in magnesium; this forms part of your daily intake.

You may get loose stools or an upset stomach to start with, however, this doesn’t mean that you’re consuming too much magnesium.

How Much Magnesium Is Too Much?

Magnesium overdose is rare. The body will naturally excrete magnesium via sweat, faeces and urine. An overdose is caused when the body cannot eliminate excess levels naturally. Those at risk of suffering from too much magnesium are those who suffer from regular constipation or are on dialysis.

If you’re suffering from confusion, extreme muscle weakness or slurring, you may have extremely high levels of magnesium in your body and will need to seek medical advice. The majority of people use magnesium supplements in safe levels. The elderly should be cautious when taking supplements as they may take the incorrect amount, and those with neuromuscular transmission disorders or atrial fibrillation should not take any magnesium supplement unless directed so by a doctor due to health risks.

For more info on Magnesium overdose and what to look out for please see our article here: Can You Take Too Much Magnesium?


Magnesium is an incredible mineral and one that has a major impact on our health and well-being. There are many symptoms of magnesium deficiency which often lie undetected. Knowing what to look out for and examining lifestyle or health factors relating to magnesium deficiency will help you to determine whether you need to use supplements.

A diet containing foods rich in magnesium, as well as supplementation,will increase levels of the mineral within your body and ensure that health problems are limited. A healthy, balanced lifestyle with lots of exercise, no smoking and cutting back on caffeine and alcohol will promote a healthier body and life.











10. Irwin R, Rippe J. Irwin and Rippe’s Intensive Care Medicine. Philadelphia: Lippincott, Williams and Wilkins; 2008.





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