4.7
Rated 4.7 out of 5 stars
344 Reviews

Pro Magnesium 4 Complex for Sleep & Energy

A clean formulation with 4 highly effective forms of Magnesium

400% More Absorption:
Chelated Magnesium Glycinate, Malate, Taurate & Citrate

Enhanced Zinc Delivery:
Triple Zinc, Picolinate, Bisglycinate & Citrate

300mg Elemental Magnesium:
For Optimal Health Benefits

Complete Vitamin Support:
Full-Doses of Vitamin B6 & D3

Boosts 300+ Metabolic Functions:
Energy, Immunity, Mood & Sleep

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“These are the 4 best forms of magnesium with the 3 best forms of zinc, giving about 80% uptake, and avoiding the negative effects of cheaper supplements like diarrhoea and minimal absorption.”
Shona Wilkinson - BSc (Hons), NTP, CNHC
  • 4 times better absorption of magnesium
  • Better sleep quality when taken at bedtime
  • Activated vitamin B6 for better uptake
  • Chelated zinc for a healthier immune system 
  • Stronger muscles and healthier nerves with superior magnesium compounds
  • Zero additives

300 mg of Magnesium, made up of:

  • 146 mg of Magnesium Bisglycinate
  • 25 mg Magnesium Malate
  • 14 mg Magnesium Taurate
  • 114 mg Magnesium Citrate

9 mg Zinc, made up of:

  • 3 mg Zinc Picolinate
  • 3 mg Zinc Bisglycinate
  • 3 mg Zinc Citrate

7 mg of Activated Vitamin B6 (Pyridoxal-5-Phosphate)

25 mcg of Vegan Vitamin D3 from algae

View full ingredients

Nutritional Facts

Serving Size: 2 Capsules
Servings Per Container: 30

Amount Per Serving   *NRV

Magnesium Blend (as Glycinate, Citrate, Malate and Taurate)

1867 mg **
Providing Elemental Magnesium 300 mg  80%
Vitamin B6  7 mg  500% 
Zinc 9 mg  90%
Vitamin D3  25 µg 500% 

*NRV = Nutrient Reference Value
** = No NRV Established

Ingredients:
Magnesium Citrate, Magnesium Bisglycinate, Vegetable Capsule Shell (Hydroxy- PropylMethylCellulose), Magnesium Taurate, Magnesium Malate, Zinc Picolinate, Zinc Bisglycinate, Vitamin B6 (Pyridoxal 5-Phosphate), Vitamin D3 from Algae, Zinc Citrate.

 

Directions: Take 2 capsules a day with food, ideally in the evening to enjoy better, more refreshing sleep. 

Storage: Store in a cool, dry place out of direct sunlight. Keep out of the reach of children.

Caution: If you are pregnant, breastfeeding, taking medication or due for surgery it is advisable to consult a GP prior to taking any supplements. Not intended for use by persons under the age of 18 years old.

Optimally Formulated Nutraceuticals

Magnesium Complex Designed by Nutritionists

Organic minerals so you absorb more

The magnesium and zinc in this supplement are bonded to organic molecules. You can absorb around 4 times more, and avoid tummy troubles.

A clean supplement

Say no to additives! There are no additives whatsoever in this supplement - just the good minerals and vitamins you need. It costs more, but you’ll benefit from the healthier premium formula.

A fully vegan supplement

Most vitamin D3 supplements are made from sheep’s lanolin, but ours comes from algae, meaning it’s superior quality and 100% vegan.

Frequently Asked Questions about Magnesium

We use four different forms of magnesium—magnesium bisglycinate, magnesium citrate, magnesium malate, and magnesium taurate—to maximise absorption and target various health benefits. Each form has a unique absorption rate and role in the body. Magnesium citrate and glycinate are known for their high bioavailability and gentleness on the stomach, while magnesium malate supports muscle function and energy production. Magnesium taurate is particularly adapted to support heart health and calm the nerves.

You cannot get the full benefits of magnesium without getting your full requirement of zinc too - and they’re both surprisingly common deficiencies. Zinc works as a partner to magnesium to support many of its vital functions including immune defence, making proteins for hormones and muscle, and for helping wounds heal. Zinc also plays a crucial role with magnesium in keeping cognitive functioning active.

We added Vitamins D3 and B6 to enhance the benefits of magnesium. Vitamin D3 promotes calcium absorption and bone health, which pairs well with magnesium's role in bone mineralisation. The active Vitamin B6 helps convert magnesium into its active form, improves magnesium absorption, and supports neurotransmitter production, which can improve mood and reduce symptoms of anxiety.

Swallow magnesium is specially formulated to minimise tummy upset by using a balanced blend of four magnesium types that are gentler on the digestive system, chosen for their high absorption rates. Cheap magnesium supplements can cause digestive issues, like diarrhoea or stomach upset, if they contain too much magnesium oxide which draws water into the bowels. 

Yes. If you are taking magnesium for better sleep or heart health, we recommend our Pro Omega 3 as its ideal partner. If you already take other supplements and want to make sure you’re not getting too much of any particular nutrient, please contact us and we’re happy to share more information. 

Boosting magnesium levels is proven to support heart health and keep blood sugar levels stable. It’s also been shown to improve sleep and reduce the risk of various neurological conditions. Scroll down to our Scientific Research section for links to research papers. 

Magnesium is known to support sleep by calming the mood and reducing muscle tension. It can help improve sleep quality and duration, particularly for people with magnesium deficiency or who experience stress-related sleep loss.

Yes, this supplement is vegan, containing no animal-derived ingredients or by-products. It is formulated with plant-based capsules and the vitamin D3 is derived from algae, so all the ingredients are suitable for both vegans and vegetarians.

No, this supplement is free from gluten, dairy, soy, and all other common allergens. It is manufactured in a facility that adheres to strict quality controls to avoid cross-contamination, making it suitable for those with dietary restrictions or allergies.

We offer free delivery on all orders which takes 2-4 days. Express delivery is available for £3.95 and takes 1-2 days. For more information see our Shipping Policy

Magnesium Complex Ingredients

What's inside

Backed by Science

Trusted, natural and safe

300 +
metabolic functions are powered by magnesium and zinc
42 %
of people in the UK hospitalised for heart conditions have a magnesium deficiency
15 %
lower risk of abnormal blood sugar levels for every 100mg increase in magnesium supplementation

Don't just take our word for it: Magnesium Complex Reviews

Gentle on tummy

Taken magnesium for years, didn't get tummy trouble on this one, will stick with it.

Susan C, Worcester

Strong dose

Good strong dose that me and my husband both use. Saves money being magnesium and zinc supplement together. Definately recommend.

SB, Southend on Sea

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More About Pro Magnesium 4 Complex

If you're looking for a magnesium supplement that does more than tick a box on a vitamin chart, the Pro Magnesium 4 Complex is built for you. Most magnesium products on the shelf use one form, usually the cheapest, and rely on the label rather than the formulation to convince you. Ours combines four different chelated magnesium forms, each chosen for a specific role in the body, so the supplement supports sleep, mood, muscle function, and daily energy in one daily dose. It's the form of magnesium most people in their 40s, 50s, and 60s actually need.

What Is Magnesium and Why Does the Form Matter?

Magnesium is a mineral involved in more than 300 enzymatic reactions in your body, including nervous system regulation, muscle relaxation, sleep, energy production, and bone formation. Around 1 in 4 UK adults consumes less than the recommended daily intake, with women, vegetarians, and older adults at the highest risk. That shortfall often shows up first as disturbed sleep, muscle tension, fatigue, and anxiety. The form of magnesium you take matters as much as the dose. Magnesium oxide, the cheapest form found in most supermarket supplements, is absorbed at around 4%. The rest passes straight through, often causing loose stools without delivering much benefit. Chelated forms, where the magnesium is bound to an amino acid or organic compound, are absorbed at closer to 40% and are far gentler on digestion. That's why the Pro Magnesium 4 Complex uses four chelated forms and no magnesium oxide.

Why Choose Pro Magnesium 4 Complex from Swallow?

Four Chelated Forms in One Daily Dose. Each two-capsule serving provides 300mg of elemental magnesium across four chelated forms:
magnesium bisglycinate, magnesium citrate, magnesium malate, and magnesium taurate. Each form has a slightly different strength. Bisglycinate is the most studied for sleep and anxiety. Citrate supports digestion and daytime energy. Malate is bound to malic acid, which plays a role in cellular energy production. Taurate is associated with cardiovascular and nervous system support. Together, they cover the range of needs that come up after 40.

Clean Label, No Magnesium Oxide

The formula contains no magnesium oxide, no artificial fillers, no synthetic colours, and no unnecessary bulking agents. It's suitable for vegans, free from gluten, dairy, and soy, and uses a plant-based capsule shell. If you've ever picked up a magnesium supplement and struggled to work out what's actually in it, you'll notice the difference straight away with a label like this. Every milligram has a job. Made in the UK to Pharmaceutical-Grade Standards. The Pro Magnesium 4 Complex is manufactured in the UK in GMP-certified facilities, the same standards used in pharmaceutical production. Each batch is independently tested for purity, potency, and contaminants, including heavy metals. Every bottle is packed in compostable, plant-based materials.

Key Benefits of Magnesium

The following health claims about magnesium have been approved by the European Food Safety Authority (EFSA), which means there is a solid body of independent evidence behind them:

  • Magnesium contributes to normal psychological function.
  • Magnesium contributes to normal functioning of the nervous system.
  • Magnesium contributes to a reduction of tiredness and fatigue.
  • Magnesium contributes to normal energy-yielding metabolism.
  • Magnesium contributes to electrolyte balance.
  • Magnesium contributes to normal muscle function.
  • Magnesium contributes to normal protein synthesis.
  • Magnesium has a role in the process of cell division.
  • Magnesium contributes to the maintenance of normal bones.
  • Magnesium contributes to the maintenance of normal teeth.
  • Magnesium for Sleep and a Calm Nervous System


If you've been lying awake at 3am, or you fall asleep easily but wake several times in the night, your body may be asking for more magnesium. Magnesium binds to GABA receptors in the brain, the same calming pathway that prescription sleep medications target, but it works gently rather than sedatively. The bisglycinate in the Pro Magnesium 4 Complex is the form most studied for sleep specifically, partly because it's bound to glycine, an amino acid that has its own calming effect.

Magnesium contributes to normal psychological function and normal functioning of the nervous system. For women in perimenopause or menopause, where falling oestrogen makes the nervous system more reactive to stress, this matters more than it ever did before.

Magnesium for Energy and Reducing Fatigue

Magnesium contributes to a reduction of tiredness and fatigue and to normal energy-yielding metabolism. In plain terms, your cells use magnesium to release energy from the food you eat. When you're short on magnesium, that process becomes less efficient, and the result is the kind of background fatigue that doesn't lift no matter how much you sleep. The malate form in the Pro Magnesium 4 Complex is particularly associated with cellular energy production, since malic acid plays a direct role in the Krebs cycle.

Magnesium for Muscle Function and Recovery

Whether you're an active 50-something who walks several miles a day, someone who lifts weights twice a week, or simply trying to manage stiff, tight muscles, magnesium plays a direct role in how your muscles contract and relax. Magnesium contributes to electrolyte balance, normal muscle function, and normal protein synthesis. The bisglycinate and taurate forms in the complex are particularly well tolerated for daily use, with no laxative effect.

Magnesium for Bone Health After 50

Magnesium contributes to the maintenance of normal bones and teeth, working alongside calcium, vitamin D, and vitamin K2 in the bone remodelling process. After menopause, when women can lose up to 20% of bone density in the first five to seven years, a daily magnesium intake becomes part of the long-term picture for skeletal health, not just sleep or mood. This is one of the reasons many women continue taking magnesium long after their hot flushes have settled.

Who Should Consider Pro Magnesium 4 Complex?

The Pro Magnesium 4 Complex is suitable for most adults and is particularly worth considering

if you: Wake up at 3am and struggle to fall back asleep, or feel wired but tired in the evening.

Are going through perimenopause or menopause and dealing with disturbed sleep, anxiety, or muscle tension. Often feel fatigued during the day despite getting enough sleep.

Are physically active and want better overnight recovery. Have tried magnesium before and felt nothing, possibly because you were taking magnesium oxide. Want a single daily magnesium complex that covers sleep, mood, energy, and muscle support.

Prefer a clean-label, vegan, UK-made supplement free from oxides, fillers, and artificial additives.

How to Take Pro Magnesium 4 Complex

Take two capsules daily, ideally 30 to 60 minutes before bed for the sleep and nervous system benefits. If you'd rather split the dose, take one capsule with breakfast and one in the evening.

The supplement can be taken with or without food, though some people find it slightly easier on the stomach with a small snack.

Caution: speak to your GP before use if you're on medication, particularly thyroid medication, certain antibiotics, bisphosphonates, or diuretics, since magnesium can affect absorption of some medicines if taken at the same time. Pregnant or breastfeeding women should consult a healthcare professional before starting any new supplement.

Clean, Ethical, and Made in Britain. Swallow supplements are made in the UK in GMP-certified facilities to pharmaceutical-grade standards. Every batch is independently tested for purity, potency, and contaminants. The Pro Magnesium 4 Complex contains only the ingredients listed on the label, with no fillers, no artificial colours, and no synthetic preservatives. It's suitable for vegans, free from gluten, dairy, and soy, and packed in 100% recyclable materials with compostable inner packaging.

The Best Magnesium Complex, Delivered to Your Door . Magnesium is one of the most common nutrient shortfalls in the UK, and one of the easiest to address with the right form at the right dose. Whether you're looking for better sleep, calmer nerves, more daytime energy, or long-term support for bones and muscle function, the Pro Magnesium 4 Complex is built around what your body can actually use.

It also pairs naturally with Pro Marine Collagen Peptides in an evening routine, since collagen is rich in glycine and supports overnight skin and joint repair.

Scientific Research on Magnesium Supplements

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4.7
Rated 4.7 out of 5 stars
Based on 344 reviews
Total 5 star reviews: 283 Total 4 star reviews: 35 Total 3 star reviews: 19 Total 2 star reviews: 5 Total 1 star reviews: 2
92%would recommend this product
Slide 1 selected
344 reviews
  • RF
    Robert F.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    1 week ago
    Great product

    Magnesium 4 complex is the best product I have tried in years. I suffer from afib and palpitations and having researched what could work to ease the symptoms i came across a cardiologist on the internet who suggested to take magnesium. After trying several other products and not seeing any results I decided to try this one. It has now been several months and I can report that the afib is a lot better and the palpitations have halved! If it’s heart health you need then this product is well worth a try. I sleep like a baby and don’t have the afternoon slump anymore.

    The Swallow Co
    6 days ago

    Hi Robert, thank you so much for your wonderful 5-star review! We're absolutely delighted to hear that our Pro Magnesium 4 Complex for Sleep & Energy has been the best product you've tried in years and has made such a significant difference to your afib and palpitations. It's fantastic that you did your research and found the guidance from the cardiologist about magnesium - it sounds like you really persevered to find the right solution for your heart health. We're thrilled that after several months you're experiencing such positive results, with your afib improving significantly and your palpitations halving. It's wonderful to hear that you're sleeping like a baby and no longer experiencing that afternoon slump - these are exactly the kind of benefits our specialised four-complex magnesium formula is designed to support. Thank you for sharing your experience, as it will be really helpful for other customers considering our Pro Magnesium for their heart health and overall wellbeing.

  • AS Profile picture for Anna S. R.
    Anna S. R.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    2 weeks ago
    Better sleep

    I take the magnesium in the evening, to help sleep and helping with vit D going to the bones. The capsule is easy to swallow.

    The Swallow Co
    6 days ago

    Hi Anna, thank you so much for your wonderful 5-star review! We're delighted to hear that our Pro Magnesium 4 Complex for Sleep & Energy is helping you achieve better sleep when taken in the evening. It's fantastic that you're also using it to support your vitamin D absorption for bone health - magnesium plays such an important role in helping the body utilise vitamin D effectively. We're pleased that you find the capsules easy to swallow too, as we know this makes a real difference to the daily experience of taking supplements. Thank you for choosing our Pro Magnesium and we hope you continue to enjoy these great benefits!

  • JL
    Julia L.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    2 weeks ago
    Very happy

    I was a bit worried these would t work as I’ve tried so many but the % of each essential ingredient has proved they do actually work which I’m thrilled about and will continue to use many on the market today do not have the essentials for helping to relax and sleep better.

    The Swallow Co
    2 weeks ago

    Hi Julia, thank you so much for your wonderful 5-star review! We're absolutely delighted to hear that our Pro Magnesium 4 Complex for Sleep & Energy has worked so well for you, especially after trying so many other products without success. It's fantastic that you've noticed the difference our carefully formulated percentages of essential ingredients make - we put a lot of research and care into ensuring our formula contains therapeutic levels of four different types of magnesium specifically designed to support relaxation and better sleep. We're thrilled that you're experiencing the benefits and will continue using the supplement!

  • GO
    Gill O.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    3 weeks ago
    Swallow swallows easily

    I was struggling to get to sleep for months and months and my friend mentioned she took magnesium before going to sleep. I did some research and found Swallow Pro Magnesium 4

    I’ve been taking them for a month now and have to say they are amazing.

    I take them in bed whilst I’m reading and then I probably fall asleep within ten minutes of turning my lamp off instead of tossing and turning for up to 2 hours.

    A Godsend! I’m about to do a repeat order!

    The Swallow Co
    2 weeks ago

    Hi Gill, thank you so much for your wonderful 5-star review! We're absolutely delighted to hear that our Pro Magnesium 4 Complex for Sleep & Energy has made such a positive difference to your sleep. It's fantastic that you've gone from tossing and turning for up to 2 hours to falling asleep within ten minutes - what an incredible improvement! We're thrilled that your friend's recommendation led you to find our magnesium supplement and that it's proven to be such a godsend for you. It's lovely to hear that you're planning a repeat order, and we hope you continue to enjoy those peaceful nights of restful sleep.

  • AH Profile picture for Ana H.
    Ana H.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    3 weeks ago
    Great mineral supplement!

    I’ve been taking The Swallow Pro Magnesium 4 Complex for Sleep & Energy since November 2024, and I’m still taking it because it’s become part of my daily routine. I’ve found it helps me relax in the evenings and supports a better night’s sleep. I also feel more refreshed when I wake up and have noticed a steadier level of energy throughout the day.

    I like that it contains four different forms of magnesium, and I’ve found it gentle on my stomach with no unwanted side effects. After using it consistently for well over a year, I’m happy to recommend it to anyone looking for a quality magnesium supplement to support sleep, relaxation, and overall wellbeing.

    I’ll definitely continue buying these and would happily recommend them to family and friends. It’s a supplement I genuinely trust and one that has worked well for me.

    The Swallow Co
    2 weeks ago

    Hi Ana, thank you so much for your wonderful 5-star review! We're absolutely delighted to hear that our Pro Magnesium 4 Complex for Sleep & Energy has become such an important part of your daily routine since November 2024. It's fantastic that you've experienced all the key benefits - better relaxation in the evenings, improved sleep quality, feeling more refreshed when you wake up, and maintaining steadier energy levels throughout the day. We're also thrilled that you find our four different forms of magnesium gentle on your stomach with no unwanted side effects, as we put a lot of care into creating a formula that's both effective and well-tolerated. Your recommendation means the world to us, and we're honoured that you trust our supplement enough to recommend it to your family and friends. Thank you for being such a loyal customer - we're so pleased it continues to work well for you!