Last Updated: Friday 14th August 2026

Magnesium citrate is magnesium bound to citric acid. It is one of the most widely used organic forms of magnesium and is more readily absorbed than inorganic forms such as magnesium oxide, which is why it appears in a large number of magnesium supplements and blends.

Magnesium supports normal muscle contraction and relaxation, nerve function, and energy metabolism. It also helps reduce the occurrence of muscle cramps and mild spasms when dietary magnesium intake is inadequate. Because magnesium is lost through sweat, requirements go up with training volume, which makes citrate a common addition to a recovery routine.

Why Choose Magnesium Citrate

• Well absorbed – An organic form of magnesium that is more readily absorbed than magnesium oxide.
• Muscle support – Commonly chosen to support healthy muscle function and help relieve cramps when dietary intake falls short.
• Mixes easily – Citrate is a popular choice in powders, making it straightforward to take a higher dose in water or a shake.
• Flexible dosing – Available in both capsules and powders, so you can adjust intake to suit your needs.
• Widely studied – One of the better-researched organic forms of magnesium in the context of absorption and exercise.

Magnesium Citrate or Magnesium Glycinate

Both are well-absorbed organic forms and either will do the job for general daily use. Citrate is the more established option for muscle support and cramp relief, and it is the form most often found in higher-dose powders. Glycinate is typically chosen by anyone with a sensitive stomach or for evening use, since it is the gentler of the two on digestion and does not carry the same mild laxative effect at higher doses. If you would prefer that route, browse our Magnesium Glycinate range.

You can also view the full Magnesium Supplements range, which covers every form and format we stock, including multi-form blends.

Single-Form Citrate or a Combination Formula

Some products in this range use magnesium citrate on its own, giving you magnesium and nothing else, with flexible dosing so you can take as much or as little as you need. Others build a formula around citrate, pairing it with ingredients such as ashwagandha, glycine, collagen peptides, passionflower, zinc, or vitamin B6, usually aimed at recovery, sleep, or winding down after training. If you want a straight mineral supplement, look for the single-ingredient products. If you are taking magnesium as part of an evening or post-training routine, a combination formula does more of the work for you.

Capsules or Powder

Magnesium citrate capsules are the simplest option for staying consistent, need no preparation, and travel well. Citrate powders let you take a larger dose in a single serve and mix readily into water or a shake, which suits anyone who would rather not swallow capsules or who wants to take magnesium straight after training. Both work, so the deciding factor is usually which one you will remember to take.

How Much Magnesium Citrate Do You Need

Check the elemental magnesium figure on the label rather than the weight of the magnesium citrate itself. A product listing 647mg of magnesium citrate may supply only 100mg of elemental magnesium, and it is the elemental number that tells you what you are actually getting. Products in this range sit between roughly 100mg and 300mg of elemental magnesium per serve. Recommended dietary intakes vary by age and sex, so follow the directions on your product label and seek professional advice if you are unsure.

Popular Magnesium Citrate Products

• Magnesium Citrate 900 by Herbs of Gold
• Adrenal Switch (Powder) by Switch Nutrition
• Magnesium Citrate by Imuni
• Magnesium Sleep + Collagen Renew by NutraLife
• Z-Mag by ATP Science

The Science of Magnesium

Peer-reviewed evidence supports magnesium's roles in energy metabolism, muscle function, and exercise contexts.

• Absorption and bioavailability – review of intestinal absorption and the factors influencing magnesium bioavailability, which concluded that dose and individual magnesium status matter more than the specific form used, Current Nutrition and Food Science, 2017.
• Exercise and performance – review of magnesium status, supplementation and exercise performance, Nutrients, 2017.
• Supplementation protocols – randomised trial comparing acute versus chronic magnesium supplementation in resistance exercise, Journal of the International Society of Sports Nutrition, 2015.
• Australian reference values – government summary of recommended dietary intakes for magnesium by age and sex, HealthDirect.

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