10 Best High Strength Potassium And Magnesium Supplements in The UK

Last updated on 09/08/2025
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9.8
Exceptional
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
Swisse
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
9.8
Exceptional
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2
9.8
Exceptional
Vegavero Magnesium + Potassium | High Strength Citrate Forms | 180 Vegan Capsules | Electrolytes for Hydration & Recovery
Vegavero
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.
9.8
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9.7
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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
WeightWorld
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.
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9.5
Superb
Electrolyte Tablets 900mg - 6 Months Supply - 180 Electrolyte Complex Tablets - Unflavoured, High-Strength & Vegan-Friendly - Sodium, Magnesium, Chloride, Calcium, & Potassium - Non-GMO & Gluten-Free
WeightWorld
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.
9.5
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9.4
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Magnesium Citrate Capsules 1620mg - Super Strength and High Absorption Magnesium Supplements - With 500mg Elemental Vegan Magnesium - Not Magnesium Tablets - Muscle & Sleep Support (Two Months Supply)
NEW LEAF PRODUCTS
Magnesium Citrate Capsules 1620mg - Super Strength and High Absorption Magnesium Supplements - With 500mg Elemental Vegan Magnesium - Not Magnesium Tablets - Muscle & Sleep Support (Two Months Supply)
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Why We Love It
  • Supports crucial bodily functions.
  • Promotes strong, healthy bones.
  • Reliable, third-party quality tested.
Main Highlights
  • WHY MAGNESIUM CITRATE – Magnesium is an essential mineral involved in numerous metabolic processes and physiological functions in our body, such as carbohydrate synthesis, and other specific actions in various organs in the cardiovascular system. (EFSA)
  • HIGH ABSORPTION – New Leaf magnesium capsules contains 1620mg of Magnesium Citrate and 500mg of Elemental Magnesium (the most bioavailable form of magnesium) per serving of 2 easy to swallow capsules. Each bottle is supplied with 120 easy-to-swallow vegan capsules that will last for 2 months.
  • PROMOTES HEALTHY BONES – Magnesium helps regulate calcium transport and absorption and is therefore crucial in maintaining healthy bones. It also helps regulate protein production, signal transmission in nerves, and other body functions.
  • MAGNESIUM BENEFITS - Magnesium contributes to normal psychological function. Magnesium contributes to a reduction of tiredness and fatigue. Magnesium contributes to normal functioning of the nervous system. Magnesium contributes to normal muscle function. Magnesium contributes to electrolyte balance. Magnesium contributes to the maintenance of normal bones and teeth. (EFSA Claims)
  • SAFETY & QUALITY - To uphold the highest standards of safety and quality, our products undergo post-production testing for heavy metals and other unwanted compounds, ensuring full compliance with international regulations. Once testing is complete, products are bottled and packaged in BRC Grade AA certified facilities, guaranteeing that our rigorous quality standards are reliably maintained and delivered to you.
  • Why Choose New Leaf Products? As a family-owned business with extensive experience in formulating and producing our unique range of over 100 vitamin and mineral supplements, we are dedicated to upholding the highest standards of safety and quality. We prioritise environmental sustainability and social responsibility, donating a portion of our sales to global causes. Join our community of over 2 million satisfied customers, where our customers are always our top priority.
9.4
Superb
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9.2
Superb
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
Nutravita
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.
9.2
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9.0
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Electrolytes Complex | 240 Vegan Tablets | Electrolyte Pills with Potassium, Calcium, Magnesium & More | Keto Diet, Hydration Recovery & Salt Replacement | High Strength Electrolyte Supplement
Supplement Tree
Electrolytes Complex | 240 Vegan Tablets | Electrolyte Pills with Potassium, Calcium, Magnesium & More | Keto Diet, Hydration Recovery & Salt Replacement | High Strength Electrolyte Supplement
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Why We Love It
  • Promotes normal muscle function.
  • 4 months consecutive supply.
  • Uncompromising quality standards.
Main Highlights
  • ESSENTIAL NUTRIENT REPLENISHMENT – Our Electrolyte Complex tablets are a synergistic blend of Calcium, Magnesium, Potassium, Sodium & Chloride. Our supplement has been expertly formulated to help anyone following a keto or low carb diet or to help them rehydrate after physical activities.
  • BENEFITS – Added Magnesium contributes to the electrolyte balance and normal muscle function. Both Potassium and Calcium contribute to normal muscle function. These claims are approved by EFSA (European Food Safety Authority).
  • 4 MONTHS SUPPLY – Take just two electrolyte tablets per day. Each bottle contains 240 vegan tablets. This gives you a 4 months’ supply, so you won't need to re-order again for at least 4 months.
  • VEGAN FRIENDLY – Manufactured in the UK to GMP code to practice, Our Electrolytes Complex tablets are Suitable for Vegans or Vegetarian and are Free from GMO (Genetically Modified Organisms), Artificial Preservatives, Artificial Colours.
  • QUALITY SATISFACTION – At supplement Tree, we only supply food supplements that are UK Manufactured to GMP code of practice in BRC (British retail consortium) certified facility, giving you total assurance that the supplements are produced to the highest possible hygiene and manufacturing standards. We are proud to offer an unconditional quality satisfaction Guarantee with all our products to ensure that our customers can shop with complete peace of mind.
9.0
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8.9
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Potassium Supplement High Strength 1200mg | 180 Vegan Tablets | 624mg of Potassium & 564mg of Chloride | Suitable for Vegans & Vegetarians | by Horbaach
Horbäach
Potassium Supplement High Strength 1200mg | 180 Vegan Tablets | 624mg of Potassium & 564mg of Chloride | Suitable for Vegans & Vegetarians | by Horbaach
15% OffFree Shipping
Why We Love It
  • Promotes Blood Pressure Normalcy.
  • Supports Immune System Health.
  • Vegan and Vegetarian Friendly.
Main Highlights
  • POWERFUL SUPPORT: Give your health a natural boost with our Potassium Chloride tablets. Each daily dose delivers a potent 1200mg of Potassium Chloride to support your wellness journey.
  • POTASSIUM: One of the seven essential macro-minerals your body needs to thrive, playing a crucial role in many vital processes.
  • EXPERTLY CRAFTED: Our professional formula is backed by our commitment to purity and potency.
  • SUITABLE FOR: Horbaach Potassium tablets are vegan and are free from artificial colours, flavours, or preservatives. It's the perfect formula for adult men and women at the best value.
  • PACKAGING MAY VARY: We are in the process of updating our packaging. If the product you receive appears different, please rest assured that the benefits remain the same.
8.9
Excellent
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9
8.7
Excellent
Nutrality Potassium Citrate 1000mg | High Strength Potassium Supplement | Nervous System, Muscle Contraction, Keto-Friendly (60 Capsules)
Nutrality
Nutrality Potassium Citrate 1000mg | High Strength Potassium Supplement | Nervous System, Muscle Contraction, Keto-Friendly (60 Capsules)
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Why We Love It
  • High strength for better results.
  • Easy daily potassium intake.
  • Supports keto diet requirements.
Main Highlights
  • HIGH STRENGTH POTASSIUM SUPPLEMENT: At Nutrality, we include more potassium in our optimal strength 1000mg capsules so you can spend less time supplementing and more time enjoying the revitalising balancing effects of potassium for your body.
  • YOUR DAILY ESSENTIAL MINERAL: Just 2 easy-to-swallow potassium citrate capsules a day allows you to reach 18% of your recommended daily potassium intake! Take with food to help restore normal pH, electrolytes and muscle function.
  • PERFECT FOR KETO DIETERS: Are you feeling the effects of an acidic environment in your body? If you’re not consuming enough food rich in potassium, taking potassium supplements can help keto dieters ensure their potassium levels stay topped up.
  • ACHIEVE UPLIFTING HEALTH BALANCE: Several health benefits associated with optimal potassium intake include balancing your body’s fluid levels, improving nerve impulses, and supporting insulin functioning.
  • 10+ YEAR BRITISH SUPPLEMENT COMPANY: We make our potassium citrate 1000mg capsules under strict European quality control and deliver them to you in premium resealable packing that fits through your letterbox.
8.7
Excellent
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10
8.7
Excellent
Potassium Supplements High Strength - 180 Vegan Potassium Tablets Mineral Electrolytes Supplement Contributes to Normal Muscle Function, Nervous System - Gluten-Free, Non-GMO, Made in UK by New Leaf
NEW LEAF PRODUCTS
Potassium Supplements High Strength - 180 Vegan Potassium Tablets Mineral Electrolytes Supplement Contributes to Normal Muscle Function, Nervous System - Gluten-Free, Non-GMO, Made in UK by New Leaf
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Why We Love It
  • Supports normal muscle function.
  • Boosts overall bodily functions.
  • Tested for assured quality.
Main Highlights
  • POTASSIUM SUPPLEMENTS HIGH STRENGTH POTASSIUM CHLORIDE - 1500mg per serving (providing 778mg elemental potassium) Potassium is an essential mineral that is important for a variety of bodily functions from contributing to the maintenance of normal blood pressure, muscle function support and to the normal functioning of the nervous system. Potassium capsules are also taken to help with electrolytes in the body.
  • ACTIVE POTASSIUM CHLORIDE - Contributes to normal muscle function, Potassium is essential for proper muscle contractions, making it an important nutrient for exercise and active individuals. Each value bottle contains 180 Potassium tablets which will last 3 months when taking two tablets per serving. Each tablets are smaller than average and easier to swallow.
  • OUR HIGH STRENGTH POTASSIUM CHLORIDE SUPPLEMENT - With superior absorption provides several benefits of potassium. Potassium is an electrolyte, a salt and mineral found in the blood that helps conduct electrical impulses in the body. Potassium contributes to the normal functioning of the nervous system, normal muscle function, and the maintenance of normal blood pressure. (EFSA)
  • SAFETY & QUALITY - To uphold the highest standards of safety and quality, our products undergo post-production testing for heavy metals and other unwanted compounds, ensuring full compliance with international regulations. Once testing is complete, products are bottled and packaged in BRC Grade AA certified facilities, guaranteeing that our rigorous quality standards are reliably maintained and delivered to you.
  • Why Choose New Leaf Products? As a family-owned business with extensive experience in formulating and producing our unique range of over 100 vitamin and mineral supplements, we are dedicated to upholding the highest standards of safety and quality. We prioritise environmental sustainability and social responsibility, donating a portion of our sales to global causes. Join our community of over 2 million satisfied customers, where our customers are always our top priority.
8.7
Excellent
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