10 Best Potassium Magnesium Supplements in The UK

Last updated on 09/08/2025

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SWISSE Magnesium & Potassium High Strength - Electrolytes Magnesium Supplements for Women & Men, 24 Sachets Muscle Recovery Supplement, Minerals & Vitamins for Tiredness and Fatigue - Made in Italy

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Why We Love It

Vegan and gluten-free formula.
Reduces tiredness and fatigue.
Supports normal muscle function.

Main Highlights

SWISSE MULTIBOOST MAGNESIUM AND POTASSIUM HIGH STRENGTH, YOUR ALLY FOR MUSCLE RECOVERY, VEGAN & GLUTEN FREE: Swisse Multiboost Magnesium and Potassium High Strength is formulated with a high content of magnesium, potassium and other minerals and vitamins to supplement your nutrition. Contains more minerals and vitamins compared to the Magnesium and Potassium product, it is suitable for vegans and gluten-free
REDUCTION OF TIREDNESS AND FATIGUE: Magnesium, iron, pantothenic acid and iron, pantothenic acid and vitamin C contribute to the reduction of tiredness and fatigue and to normal energy-yielding metabolism. Pantothenic acid contributes to normal mental performance. Magnesium, potassium, and vitamin C contribute to normal functioning of the nervous system, while magnesium and zinc contribute to the maintenance of normal bones
SUPPORT OF NORMAL MUSCLE FUNCTION, PROTEIN SYNTHESIS, AND BLOOD PRESSURE: Magnesium and potassium contribute to the maintenance of normal muscle function. Magnesium contributes to normal protein synthesis and normal electrolyte balance, while potassium contributes to the maintenance of normal blood pressure. Magnesium, together with vitamin C, supports normal psychological function
DIRECTIONS FOR USE AND WARNINGS: Dissolve one sachet daily in a glass of water. Do not exceed the recommended daily dose. In some people, high doses of magnesium may cause mild gastrointestinal disturbances. In these cases, it is advisable to divide the dose over the day, or take a reduced amount of powder
SWISSE, SUPPORTING HEALTH AND WELL-BEING FOR OVER 50 YEARS: Swisse was founded in Australia in the late 1960s and now has over 50 years of experience in the world of supplements. It is committed to constantly investing in independent scientific research and new product development, manufactured to high quality standards to supplement your nutrition and help you live your best life every day

Vegavero Magnesium + Potassium | High Strength Citrate Forms | 180 Vegan Capsules | Electrolytes for Hydration & Recovery

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Why We Love It

Supports muscle function and energy.
Contains high-quality magnesium citrate.
Vegan and additive-free.

Main Highlights

💦 MUSCLE FUNCTION AND ENERGY: Potassium and magnesium have important functions for a variety of physiological processes. They are especially important for the normal functioning of muscles, nerves and for energy metabolism. Every day, large amounts of potassium and magnesium are excreted through our sweat and must be replenished to prevent electrolyte imbalances. This is especially relevant for people who are very active.
⭐ IDEAL COMBINATION: Magnesium is tightly linked to the metabolism of potassium, which is why we combined the two minerals in one product. For our potassium and magnesium capsules we use high quality magnesium citrate and potassium citrate powders. This form is highly stable and contains significantly more elemental magnesium and potassium than other magnesium supplements. It is also characterized by a high bioavailability as the citrate mineral form is quickly absorbed by the body.
🔎 ANALYSED: Our magnesium + potassium capsules are tasteless and thus a good alternative to magnesium and potassium tablets. We do not include anti-caking agents or other additives. In addition, we have our product analysed for various impurities. Of course, our product is suitable for vegans. Per bottle: 180 capsules. Recommended dosage: 6 capsules per day, 2 with each meal (equals 500 mg potassium and 225 mg magnesium).
🌿 VEGAVERO – From Nature, with Passion, For You: We respect and love nature. That's why all our supplements are vegan and free of any unnecessary artificial ingredients. We believe in the importance of guaranteeing quality and safety to our customers and therefore select our raw materials with great care. We produce our products in Germany, where they are all analyzed and certified by independent laboratories. Furthermore, we register every product with the Ministry of Health.
💓 BY YOUR SIDE: Caring for you is part of our philosophy. So, in addition to providing supplements designed for your needs, we work on unique formulas to achieve the perfect synergy of ingredients and dosages for you. If you have any queries, we are happy to advise and support you in your goals, and/or provide you with the certifications of each product and to answer all your questions.

Viridian - Potassium & Magnesium Citrate - 90 Caps | Blood Pressure & Muscle Function Support | High Absorption Mineral Formula | Vegan Friendly | Nutritionist Formulated

Why We Love It

Promotes heart and muscle health.
Supports nerve function.
Enhances energy production.

Main Highlights

BLOOD PRESSURE & MUSCLE FUNCTION: Potassium & Magnesium Citrate helps maintain normal blood pressure and supports healthy muscle and nerve function, making it a valuable daily supplement for cardiovascular health, muscle recovery, and overall wellness.
HIGHLY ABSORBABLE MINERALS: Potassium and magnesium in citrate form offer superior absorption, helping to replenish electrolytes, reduce cramps, and support energy metabolism, ideal for active lifestyles, stress management, and physical recovery.
FILLING NUTRITIONAL GAPS: Modern farming and food processing have reduced key nutrients in our diets. Our mineral complex supplement provides essential potassium and magnesium to help restore balance and support everyday energy, muscle, and cardiovascular health.
EXPERTLY FORMULATED: Contains 100% active ingredients with no fillers, artificial additives, GMOs, or palm oil. Developed by expert nutritionists and manufactured in the UK to the highest ethical and quality standards, supporting both you and the planet.
COMPLETE SATISFACTION: Every Viridian supplement is fully considered from the seed to the recycling bank with 130 quality checks. Our customer service team and qualified nutritionists are based in Northamptonshire and available to support you. Our range is also stocked in independent health stores across the country.

Aliness Magnesium Citrate with Potassium and Vitamin B6, 100 Vegan Capsules

Potassium Supplement High Strength 1460mg with Vitamin C - Electrolytes Tablets - 3 Months Supply - 180 Vegan Potassium Tablets for Muscle Function - Natural Electrolytes Support - Superior Absorption

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Why We Love It

Superior absorption and bioavailability.
Contributes to normal functions.
Promotes healthier body and mind.

Main Highlights

HIGH-STRENGTH POTASSIUM CITRATE TABLETS WITH VITAMIN C: Discover a convenient solution for getting the vital minerals with our high-strength Potassium Citrate tablets enriched with Vitamin C. Each serving of our Potassium tablets offers 1380mg of Potassium Citrate, with 500mg of active Potassium & 80mg of Vitamin C to help you live an active life. Our tablet has superior absorption & bioavailability compared to other electrolyte tablets or Potassium citrate capsules available in the market.
HIGHLY ABSORBING POTASSIUM ELECTROLYTE SUPPLEMENT: Potassium is an electrolyte, salt & mineral found in the blood that helps conduct electrical impulses in the body. Potassium contributes to the normal functioning of the nervous system & the maintenance of normal blood pressure. Potassium citrate offers better absorption when compared to other forms like potassium chloride or potassium iodide. Vitamin C contributes to the normal function of bones, nervous & immune system (EFSA Approved Claims).
3 MONTHS SUPPLY OF VEGAN POTASSIUM CITRATE TABLETS: Each bottle of our Potassium supplements & electrolytes offers you 180 tablets, 3 months supply, which is ideal for your health. These hydration tablets (not potassium capsules) are Vegan, gluten & lactose-free. Our Potassium electrolyte tablets contain only premium ingredients & no artificial flavours. Our products are manufactured, tested & certified under the UK GMP guidelines & these potassium citrate powder tablets are no exception.
POTASSIUM CITRATE TABLETS TO RECHARGE YOUR LIFE: Potassium, as a mineral electrolyte, is essential for normal muscle function (EFSA Claims). It is famous for helping with sports & exercise as a muscle supplement. Our keto electrolyte supplement Potassium tablets make it easy to get recommended minerals to support your daily life. Our potassium supplement is better than electrolyte powder & offers a high potassium strength & better Supply compared to most of our competitors
WEIGHTWORLD – TRUSTED FOR HEALTH SINCE 2006: A British-grown family business with 18+ years of experience formulating and manufacturing 200+ vitamins, food supplements and health devices. All our products are made using premium quality ingredients and have gone through intensive research to meet the daily nutritional requirements of people across the globe. We create UK-made, GMP-certified products aimed at promoting a healthier body & mind for you and your family.

PHOUR Salts - Alkaline Mineral Salts with Magnesium and Potassium : 450g : ALKALINE CARE

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Why We Love It

Boosts energy, vitality and tone.
Improves digestion significantly.
Enhances athletic performance noticeably.

Main Highlights

Boosts energy, tone and vitality.
Improves digestion.
Enhances athletic performance.
Helps the remineralization of the body, helping your muscles, bones and joints stay youthful.
Helps balance your pH

Electrolyte Tablets 900mg - 6 Months Supply - 180 Electrolyte Complex Tablets - Unflavoured, High-Strength & Vegan-Friendly - Sodium, Magnesium, Chloride, Calcium, & Potassium - Non-GMO & Gluten-Free

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Why We Love It

Power-packed with essential minerals.
Supports active lifestyle recovery.
Keto-friendly and sugar-free.

Main Highlights

180 TABLETS - 6 MONTHS SUPPLY: Each bottle contains 180 Electrolyte tablets, designed to last 6 months with the recommended daily intake. Delivering 900mg of essential electrolytes per serving, these tablets have no aftertaste and require no mixing, making them a clean and convenient option for any daily routine.
WHY ELECTROLYTE IS ESSENTIAL: Electrolytes include minerals such as magnesium, potassium, calcium, and chloride. Magnesium contributes to electrolyte balance. Potassium contributes to normal muscle function. Calcium contributes to normal energy-yielding metabolism. Chloride contributes to normal digestion by production of hydrochloric acid in the stomach (EFSA)
GO-TO VEGAN-FRIENDLY TABLETS: Each serving of the electrolyte supplement provides high strength electrolyte complex in convenient, travel-friendly tablets. Formulated to be vegan-friendly, gluten, allergen & lactose-free, these electrolyte tablets are designed to complement a balanced way of life. Made for those who like things simple and clear.
EASY-TO-SWALLOW TABLETS: WeightWorld's Electrolyte tablets are convenient and easy to swallow, with no need for measuring. Whether as part of a daily routine or while travelling, they offer a practical way to stay consistent. Free from artificial flavours, they offer a clean choice for everyday intake. With no unnecessary additives, this makes it a to-go choice.
THE JOURNEY OF WEIGHTWORLD: Born from a passion for food supplements, WeightWorld has been growing since 2006. With nearly two decades of experience, the brand offers a wide range of products, including vitamins, minerals, plant-based supplements, devices, and more. Now reaching multiple countries, the focus remains on developing products that evolve with changing needs while staying true to the values that started it all.

Potassium Supplement High Strength 1550mg & Vitamin C - 240 Vegan Tablets - 4 Month Supply - Potassium Citrate for Natural Electrolytes Support - Made in The UK - Nu U Nutrition

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Why We Love It

Lasts a full four months.
Significant strength formulation provided.
Potassium electrolyte replenishes effectively.

Main Highlights

✔ 33% MORE TABLETS - Our premium Potassium supplement is highly cost effective. With each bottle delivering 240 tablets to last a full 4 months Other Potassium supplements do not provide nearly as many tablets per bottle. In fact we provide 33% more tablets than other Potassium Citrate supplements which typically offer just 180 tablets. As with all our products you can expect the highest quality and great value for money.
✔ SUPERIOR STRENGTH FORMULATION - Our tablets provide a high strength serving of Potassium Citrate that not many other supplements offer. Each two tablet serving delivers 1,390 mg of Potassium Citrate of which 500 mg is elemental Potassium. This is the actual amount of Potassium present in the formulation. Our formulation uses premium Potassium Citrate which offers improved bioavailability when compared to Potassium Chloride or Potassium Iodide supplements.
✔ WITH ADDITIONAL VITAMIN C - Our Potassium supplement contains Vitamin C, which contributes to the normal function of the immune system* and helps in collagen formation for normal function of bones, skin, teeth and gums*. Vit C also contributes to reduction of tiredness and fatigue* as it increases iron absorption to help carry oxygen through the body. Furthermore, it contributes to the protection of cells from oxidative stress*. Claims substantiated by EFSA (European Food Safety Authority).
✔ REPLENISH & REBALANCE - Potassium, as a mineral electrolyte, is essential for normal muscle function (EFSA Claims). It is often taken by men and women who exercise as a muscle supplement. Our electrolyte supplement offers a convenient and quick way to benefit from this valuable nutrient with minimal fuss. Just two tablets a day is all that is needed so you can replenish your body quickly and effectively.
✔ THE NU U NUTRITION STORY - TRUSTED SUPPLIER OF NUTRITIONAL SUPPLEMENTS - Starting as a family business, we’ve expanded to offer a diverse range of high-quality supplements designed to support different lifestyles. Our mission is to make wellness simple, with premium ingredients that cater to your daily nutritional needs—whether for general health or targeted goals.

Electrolytes Complex - 270 Vegan Unflavoured Tablets with Sodium, Potassium, Magnesium & Calcium Phosphate - Suitable for Carnivore & Paleo Diet - Made in The UK - Xellerate Nutrition

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Why We Love It

Great value with more tablets.
Lasts a staggering 4.5 months.
Delivers five essential electrolytes.

Main Highlights

✔ MORE TABLETS PER BOTTLE - Our fantastic Electrolytes supplement provides a great value option, as we provide more tablets per bottle than most other Electrolyte Complex supplements. Each bottle contains 270 tablets for a total of 135 individual servings. As with all our products we aim to provide the highest quality and the best value for money. You won’t be disappointed.
✔ 4+ MONTH SUPPLY - When taken at the recommended 2 tablet a day serving size, our cost effective electrolytes tablets will last you a full 4.5 months. Most other Electrolytes supplements don’t last nearly as long. Our formulation is the perfect solution to keep you feeling hydrated and energised.
✔ HIGH STRENGTH - Each tablet contains 900 mg of essential electrolytes to rehydrate and replenish rapidly. We have formulated our complex to be taken by both men and women and meet the demands of runners, crossfitters, cyclists, gym-goers and more. Our tablets are vegan friendly, allergen free and contain no GMO ingredients, sugar or calories. They are also suitable for those following a low carb or keto diet.
✔ DELIVERS 5 ESSENTIAL ELECTROLYTES - This formula includes Sodium, potassium, magnesium, calcium, and chloride. All of which play vital roles in maintaining proper hydration and supporting various bodily functions. Replenishment and maintaining healthy hydration has never been easier! Our fuss free and easy to swallow tablets are a convenient way to replenish lost electrolytes when compared to effervescent tablets and rehydration salts that need to be mixed.
✔ WHY TRUST XELLERATE? - Xellerate is produced by Nu U Nutrition who undertake the manufacturing of their products themselves. You can therefore be safe in the knowledge that you are receiving a supplement of exceptional quality which uses safe, clean and natural ingredients to help you reach your peak performance.

Electrolyte Complex - High Strength Tablets with Added Magnesium, Potassium & Calcium - Muscle Function and Electrolyte Balance - 240 Vegan Tablets - No Synthetic Binders - Made in The UK by Nutravita

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Why We Love It

Promotes balanced electrolytes, improved muscle function.
Offers wholesome vegan friendly supplement.
Award-winning, globally recognized brand.

Main Highlights

✔ WHY NUTRAVITA'S ELECTROLYTE COMPLEX? - Electrolytes are salts and minerals, such as Sodium, Potassium, Chloride and Bicarbonate, which are found in the blood and help conduct electrical impulses in the body. Our product has been blended with Sodium, Potassium, Chloride, Calcium and Magnesium for added benefits.
✔ WHAT ARE THE BENEFITS OF TAKING OUR ELECTROLYTE COMPLEX? - The added Magnesium contributes to electrolyte balance, while also contributing to normal muscle function. The ingredients Potassium and Calcium both contribute to normal muscle function. Claims substantiated by EFSA (European Food Safety Authority).
✔ HOW TO TAKE OUR ELECTROLYTE COMPLEX - Our supplement is vegan friendly, and comes with 240 tablets. At a recommended daily serving of 2 tablets per day, our supplement will last you for 4 months. Our supplement is designed to be suitable for both men and women, as well as being free from GMO, nuts, gluten, lactose, and wheat.
✔ AWARD WINNING - We are proud to share that products in our sports range have won an award in the Men's Fitness Nutrition Awards 2024. We deliver the same quality across our entire sports range to improve workout performance, boost muscle growth, and speed up recovery. Our sports range brings the essentials for consistent and reliable support in all types of training and performance goals - for the casual gym goer or fitness enthusiasts, up to the extreme athlete, and every level in between.
✔ WHAT IS THE STORY BEHIND NUTRAVITA? - Nutravita is a recognised and trusted Vitamins & Supplements brand providing thousands of customers across the world since 2014. Our high quality products are manufactured, batch tested and certified in the UK, and safeguarded by the highest manufacturing standards in the world (GMP, BRC). We have a dedicated team of pharmacologists, chemists and research scientists working to source the finest and most beneficial ingredients.

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We scanned 468 products

We reviewed these offers relevant to the Potassium Magnesium Supplements within online retailers such as Amazon, eBay and other local retailers, ensuring we covered all major brands and models. The products we selected come from trusted brands like Swisse, Vegavero, Viridian, Aliness, WeightWorld, Alkaline Care, Nu U Nutrition, Xellerate NUTRITION, Nutravita, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.

For the best Potassium Magnesium Supplements in the market, we considered we took a deep dive into 2341 online reviews , focusing on elements like user satisfaction, performance in real-world conditions, and long-term reliability. Our ranking also evaluates each review’s relevancy, authenticity, up-to-dateness and depth so that the comparison is more sound.

We concluded that:

The clear winner of our analysis is SWISSE Magnesium & Potassium High Strength - Electrolytes Magnesium Supplements for Women & Men, 24 Sachets Muscle Recovery Supplement, Minerals & Vitamins for Tiredness and Fatigue - Made in Italy. We love many things about this product by Swisse. What sets it apart from the competition is Vegan and gluten-free formula, Reduces tiredness and fatigue, Supports normal muscle function.
The best value product for most shoppers and where user satisfaction is continuously the highest is Vegavero Magnesium + Potassium | High Strength Citrate Forms | 180 Vegan Capsules | Electrolytes for Hydration & Recovery by Vegavero based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for Potassium Magnesium Supplements and the best cost-to-value ratio is Electrolytes Complex - 270 Vegan Unflavoured Tablets with Sodium, Potassium, Magnesium & Calcium Phosphate - Suitable for Carnivore & Paleo Diet - Made in The UK - Xellerate Nutritionat Xellerate NUTRITION with a 20% discount.
Our list of the best Potassium Magnesium Supplements is updated regularly to reflect new releases and changes in product availability, so be sure to check back often for the latest rankings and discounts.

10 Best Potassium Magnesium Supplements in The UK

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We scanned 468 products

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