NutriPeak · Mineral Series · 03
Pure Magnesium Citrate
A highly bioavailable form of an essential mineral — chosen for absorption, formulated for daily muscle and nervous system support.
01 — Source
02 — Form
03 — Measure
04 — Soluble
In Stock — UK Dispatch
Pure Magnesium Citrate
200g powder · Approximately 40 servings · Unflavoured
Choose Size
Quantity
- Form
- Citrate powder
- Per Serving
- 300mg elemental magnesium
- Servings
- Approximately 40
- Dispatch
- Leeds, UK
Food supplement. Not a substitute for a varied diet. Consult a qualified nutritional professional before use if pregnant, breastfeeding, or taking other supplements.
Why Citrate
Three reasons this form matters
01
Absorption First
Magnesium oxide — the cheapest and most common form on shop shelves — has notoriously poor gut absorption. Citrate dissolves readily in water, meaning a greater share of the mineral actually reaches your bloodstream rather than passing straight through.
02
Gentle on the Gut
Some magnesium forms carry a strong laxative effect at higher doses. Citrate sits in the middle ground — effective enough for daily use without the sharp digestive discomfort that puts people off cheaper alternatives. Most adults tolerate it well as part of a consistent routine.
03
Versatile Timing
Take it in the evening to wind down, or split doses through the day. The unflavoured powder mixes into water, juice, or a smoothie without chalky residue. No fillers, no binders — just the mineral in a form your body can actually put to work.
The Importance of Bioavailability
Not all magnesium is equal
Magnesium oxide dominates the supplement market because it is cheap to produce and dense in elemental magnesium by weight. The catch is that your gut absorbs very little of it. Studies of comparative absorption consistently show citrate outperforming oxide, meaning you get more usable magnesium gram for gram.
By choosing the citrate form, we accept a slightly lower elemental density in exchange for markedly better uptake. The result is a supplement where more of what is on the label actually does something useful in your body, and less is wasted.
This also matters for comfort. Poorly absorbed magnesium stays in the digestive tract and draws water with it — the reason cheap forms are associated with digestive urgency. Citrate is absorbed before that becomes an issue for most people.
Note on Form
Citrate is the magnesium salt of citric acid — the same compound found naturally in citrus fruit. It dissolves fully in water within seconds.
Muscle Function
How magnesium supports your muscles
Every time a muscle fibre contracts, calcium flows into the cell. When it is time to relax, magnesium steps in to push that calcium back out. Without enough magnesium available, muscles cannot release fully after contracting — which is why low levels are associated with tension, cramping, and that tight feeling after intense training.
This makes magnesium citrate a popular choice among athletes and active people. Supporting the relaxation phase of muscle function helps the body recover between sessions and may reduce the everyday tightness that builds up from desk work, training, or travel.
It is not a quick fix for any particular complaint. Think of it as keeping the mineral supply chain steady, so the systems that manage contraction and relaxation have what they need, day in and day out.
Nervous System
Keeping signals calm and clear
Magnesium sits at the brake pedal of the nervous system. It regulates the release of neurotransmitters — the chemical messengers that tell neurons to fire or settle down. When magnesium is available, the nervous system has an easier time maintaining a settled, steady state rather than staying stuck in overdrive.
Many people take magnesium in the evening specifically for this reason. A calmer nervous system in the hours before bed can support the transition into rest, which is why evening supplementation has become a common habit among people focused on sleep quality.
This is not about forcing relaxation. It is about giving your body the raw material it uses naturally to regulate neural activity, so the built-in systems work the way they are supposed to.
Beyond Muscles
Energy, heart, and bone
Magnesium works quietly across systems you might not associate with a mineral supplement. Here is what else it contributes to in normal daily function.
Cellular Energy
Charging the cellular batteries
ATP — the molecule your cells use for energy — cannot function without magnesium bound to it. In practical terms, this means that without adequate magnesium, your body struggles to convert food into usable energy. Keeping levels steady helps maintain normal energy production at the cellular level, which is why tiredness and low magnesium often go hand in hand.
Heart
Supporting a steady rhythm
The heart is a muscle that never rests, and it depends on a constant supply of magnesium to maintain a steady, regular rhythm. Magnesium also supports the normal function of blood vessels, contributing to overall cardiovascular wellness. It is one of the minerals the circulatory system relies on most heavily.
Bone Density
The calcium partner
Calcium gets the headlines for bone health, but magnesium is the partner that makes calcium work properly. It helps regulate calcium levels in the body and is directly involved in the structural development of bone tissue. Taking magnesium alongside calcium helps ensure that calcium is directed into bone rather than settling where it does not belong.
Serving Suggestions
How to use it, and when
Magnesium citrate is flexible. The unflavoured powder dissolves fully in water, juice, or a smoothie. Here is a practical framework for getting the most from your daily serving.
Evening
For winding down
Many people take their full serving an hour or two before bed. Supporting the nervous system in the evening hours can help the body transition toward rest and support sleep quality.
Split Doses
Through the day
If you prefer, split your daily serving into two or three smaller doses taken with meals. This can improve tolerance and keep magnesium levels steady rather than spiking them all at once.
Practical Guidance
- Mix one scoop (approximately 5g) into 200ml of water. Stir until fully dissolved — citrate dissolves readily, so this takes only a few seconds.
- Do not exceed the recommended daily intake. More is not better — the body uses magnesium steadily over time rather than in large bursts.
- Follow the guidance on the label or consult a nutritional professional if you are unsure about the right amount for your individual needs.
- Store in a cool, dry place away from direct sunlight. Keep the canister sealed between uses to protect the powder from moisture.
Bulk Buy Discounts
Save when you stock up
Buy two or more canisters and the unit price drops automatically at checkout. A practical option if magnesium is part of your long-term daily routine.
Product Specifications
What is in the canister
Composition
- Active ingredient
- Magnesium citrate
- Elemental magnesium per serving
- 300mg (80% NRV)
- Serving size
- 5g (approx. 1 scoop)
- Servings per container
- Approximately 40
- Net weight
- 200g
What is not in it
- No fillers, binders, or anti-caking agents
- No artificial flavours, colours, or sweeteners
- No added sugar or starch
- Suitable for vegetarians and vegans
- No genetically modified ingredients
- Manufactured to UK food supplement standards
Allergen Information
Produced in a facility that handles milk, soya, and gluten. No allergens are intentionally added to this product. Check with our team if you have specific concerns.
Questions
Common questions about magnesium citrate
If something is not covered here, our team in Leeds is available Monday to Friday, 9:00 to 18:00, to talk through what you need.
Contact the team
Why citrate instead of oxide or glycinate?
Magnesium oxide is cheap but poorly absorbed — much of it passes through the digestive tract unused. Glycinate is well absorbed and gentle, but it is more expensive to produce. Citrate offers a strong middle ground: significantly better absorption than oxide, good digestive tolerance for most people, and a reasonable price. It is the practical all-rounder for daily supplementation.
When is the best time to take it?
There is no single correct time. Many people take magnesium in the evening because it supports the nervous system during the wind-down hours before bed. Others split their serving across the day with meals. Both approaches are valid — the important thing is consistency, because magnesium works through steady daily intake rather than occasional large doses.
Can I take it alongside other supplements?
Magnesium pairs well with calcium, vitamin D, and B-complex vitamins. In fact, vitamin D and magnesium work together — magnesium is needed to activate vitamin D in the body. If you take other supplements or have specific dietary concerns, our team can offer guidance. We are not able to advise on individual circumstances without more context, but we can help you think through how to structure your routine.
How long does a canister last?
At the recommended serving of one 5g scoop per day, the 200g canister lasts approximately 40 days. If you split servings or adjust the amount with guidance from a nutritional professional, the canister will last longer. The powder stays fresh for 24 months from the manufacture date when stored sealed in a cool, dry place.
Is this suitable for vegetarians and vegans?
Yes. The powder is 100% magnesium citrate with no animal-derived ingredients and no capsule shell. The only thing in the canister is the mineral salt itself. The packaging is recyclable.
Where do you ship from?
All orders are dispatched from our facility in Leeds, United Kingdom. Standard UK delivery typically arrives within 2–3 working days. You can read the full details on our shipping and returns pages.
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Learn About Minerals
Still exploring which magnesium is right for you?
Our full mineral range covers citrate, bisglycinate, and combination formulas. Each product page explains the form, the reasoning, and practical usage guidance.