Magnesium Glycinate 400mg — Premium Chelated Form
400mg elemental magnesium as bisglycinate — the highest-bioavailability, most stomach-friendly form. The UK's #1 choice for sleep and stress.
What does optimal health cost per day?
Less than a coffee top-up. Optimal nutrition for 33p/day — the most cost-effective investment in your health.
Free Vitamin C 1000mg with orders over £40
While stocks last · auto-added at checkout
Supply size
Most customers reorder this monthly. Each pack lasts ~30 days.
Subscribe and save 15% — never run out. Switch to subscription
Your daily health investment
£0.53
per day
£3.71
per week
£15.99
per month
Less than a daily coffee — for daily nutritional support from Magnesium Glycinate.
Auto-delivered. No minimum term. Cancel any time.
Price locked forever — we never raise your subscription price. Cancel any time, no fees.
Bundle and save up to 20%
Add 2+ products to your stack — discount applied automatically at checkout.
Not ready to commit? Try a 7-day sample pack
Only £2.99 — credited toward your first full order
Group buy — save up to 30%
Limited spotsPool orders with other Magnesium buyers. The more people join, the more everyone saves. Next group buy runs when we hit 50 registrations.
📦 What to expect when it arrives
Premium box
Double-sealed. No cheap poly bags — every Medibro order ships in a quality box.
Amber glass
UV-protective amber glass preserves potency. Satisfying click-lid seal.
Little extras
Every first order includes a usage guide and a surprise freebie — see what you get.
Start today
Take your first dose the day it arrives — don't wait for a 'perfect moment'.
Your 30-day journey starts today
Future you will look back on this moment.
Based on typical customer reports. Individual results vary. Backed by our 30-day guarantee.
Premium packaging, inside and out
Amber glass jar
Blocks UV degradation, no plastic leaching
100% recyclable
Jar, cap, and box are fully kerbside recyclable
No artificial fillers
No magnesium stearate, silicon dioxide, or titanium dioxide
- Free UK delivery over £35
- 14-day hassle-free returns
- Secure checkout, audit-logged
- Manually compliance-reviewed
Order dispatched, tracking info sent. Most customers take their first dose the day it arrives.
Research shows it takes ~14 days to anchor a new habit. By now, most customers have found their ideal time of day.
At 8 weeks, customers report the strongest improvements. Consistency is everything with nutritional supplements.
Over 90% of Medibro subscribers are still on the same product at 3 months — the clearest signal a supplement is working.
Seasonally relevant now
July: Peak activity season — optimise performance with the right stack
Magnesium glycinate (bisglycinate) is the gold standard for supplementation — bound to glycine for maximum absorption and minimum GI side effects. Unlike magnesium oxide (only 4% absorbed), bisglycinate delivers up to 80% elemental magnesium to cells.
Each capsule provides 400mg elemental magnesium — well above the EU NRV of 375mg. 120 capsules = 2 months at 2 capsules/day.
Benefits
- ✓Sleep quality
- ✓Stress reduction
- ✓Muscle relaxation
- ✓Energy production
- ✓PMS
Dosing Guide
How to take Magnesium Glycinate 400mg — Premium Chelated Form
Take 1–2 capsules 30–60 minutes before bed, or as directed. Can be split: 1 capsule with lunch, 1 capsule before bed.
Always read the label. Consult a healthcare professional if you have any medical conditions or take prescription medication.
Quality & transparency
Why form matters
Medibro uses
Magnesium Bisglycinate
~80% absorbed
Others often use
Magnesium Oxide
Lower bioavailability
Glycinate is chelated — bound to an amino acid that the gut treats like food, not a mineral.
Oxide form passes through largely unabsorbed and commonly causes digestive discomfort. Studies show bisglycinate delivers 3-4x more elemental magnesium to cells.
How we compare
Medibro vs. typical high-street / marketplace alternatives
| Feature | Medibro | Others |
|---|---|---|
| Form | Glycinate (high absorption) | Oxide (poor absorption) |
| Elemental Mg per serving | 400mg | 100–200mg |
| Third-party tested | ||
| Filler-free capsules | ||
| 30-day guarantee | ||
| UK manufactured |
SACN identifies widespread magnesium inadequacy
The National Diet and Nutrition Survey found the majority of UK adults — especially women — consume below the Reference Nutrient Intake for magnesium.
Source: NDNS Rolling Programme 2019
Magnesium works best alongside:
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Your personalised stack
Recommended to pair with Magnesium Glycinate
What to expect over time
Cellular magnesium levels start rising. Some people notice slightly improved sleep quality within the first few days.
Most users report deeper sleep and reduced evening anxiety. Muscle tension may ease noticeably.
Cellular magnesium at optimal levels. Energy, mood stability and muscle recovery consistently better.
Cardiovascular and bone benefits accumulate. Chronic deficiency symptoms resolve fully for most users.
What to expect
A realistic week-by-week guide for first-time users
The most common first change: falling asleep faster and fewer night wakings.
Muscle tension and cramps typically improve by week 2. Evening anxiety often softer.
Magnesium-dependent enzymes are now optimally supported. Most notice more stable energy and mood.
Cardiovascular and metabolic benefits become measurable. This is your new baseline.
Individual results vary. Consistency is key — don't assess before week 6.
Clinical evidence
Peer-reviewed research⏰ How to take for best results
Best time
Evening, 1 hour before bed
Take with
Water or food — reduces any GI sensitivity
Avoid with
Zinc supplements (competing absorption)
Magnesium glycinate is gentle enough to take any time. Evening use supports sleep quality.
Personalised dose calculator
For guidance only. Consult your pharmacist or GP if you take prescription medication.
Frequently asked questions
Pairs perfectly with
15% off when bought togetherVitamin D3+K2
Essential co-factor
D3 and magnesium work synergistically — each improves the other's absorption
Bundle total: £30.98 → £26.33
Find your perfect supplement stack
Answer 4 quick questions and get a personalised stack built around your goals, health history, and lifestyle.
Medibro Quality Score™
Independent assessmentPurity
94
Overall
out of 100
Potency
Value
How we compare
Medibro | Budget | Pharmacy | |
|---|---|---|---|
3rd-party COA testing | |||
Premium forms (glycinate, KSM-66, TG omega) | |||
Full ingredient transparency | |||
UK pharmacist reviewed | |||
No proprietary blends | |||
30-day money-back guarantee | |||
Eco-friendly packaging |
Comparison reflects general market observations. Specific brands may vary.
What outcomes matter most to you?
🌍 Ingredient sourcing
Magnesium Glycinate
Netherlands
Chelated for superior absorption
Glycine
Germany
Pharmaceutical-grade amino acid
UK deficiency data
Over 60% of UK adults consume below the recommended daily magnesium intake
Source: National Diet and Nutrition Survey, 2019
Common symptoms
Higher risk if
This information is educational. Always consult your GP before supplementing if you have a health condition.
Founded by a UK pharmacist
“After 12 years dispensing prescriptions, I was frustrated by the gap between expensive supplements and what the evidence actually supports. Medibro was built to source properly — clinical doses, verified purity, fair prices.”
— MPharm, GPhC registered · Medibro founder
Every formula is reviewed by our in-house pharmacy team before launch.
Supplement Interactions
What can I safely combine this with?
Magnesium is required to convert Vitamin D to its active form. Without adequate magnesium, Vitamin D supplementation is far less effective.
Magnesium and zinc can compete for absorption. Take at least 2 hours apart for optimal uptake of both minerals.
Magnesium and calcium work together in muscle contraction/relaxation. A 2:1 calcium:magnesium ratio is generally recommended.
⚕️ Always consult a healthcare professional before combining supplements with medication.
Stack Synergies
Science-backed pairings for better results
Magnesium is D3's essential co-factor — both nutrients activate each other synergistically
B6 significantly increases intracellular magnesium uptake and retention
Complementary minerals supporting immune function, testosterone, and sleep quality
Synergies based on published nutritional science. Individual results may vary. Always consult a healthcare professional before combining supplements.
Complete your stack
✨What customers say
From 20 reviews★ 4.7Customers appreciate the high absorption and effectiveness of magnesium glycinate, reporting significant improvements in sleep quality, anxiety reduction, and relief from muscle cramps and restless legs.
Some users mention that it takes 3-6 weeks to see noticeable results and express concerns about the product being relatively expensive for long-term use.
This supplement is ideal for individuals struggling with sleep issues, anxiety, muscle cramps, or those seeking a high-quality magnesium option recommended by healthcare professionals.
Customer reviews
- ★★★★☆Emma R.Verified buyer02/04/2026Good product, takes time
Takes about 3-4 weeks to feel the difference but I can now say my anxiety is slightly reduced and I sleep through the night more consistently. The capsules are easy to swallow too. Would be 5 stars but takes a while to kick in.
- ★★★★★Neil H.06/03/2026Premium quality worth the price
The glycinate chelate form is more expensive than oxide but the difference in absorption and tolerance is massive. Worth every penny.
- ★★★★★Tom H.Verified buyer25/02/2026Solved my restless legs
Had restless legs syndrome for years. My physio suggested magnesium glycinate and after 4 weeks this has genuinely reduced significantly. Can't believe I didn't try this sooner.
- ★★★★★Alan B.Verified buyer24/02/2026Stopped my leg cramps
Night time leg cramps were destroying my sleep. 2 capsules of this before bed and they're gone completely. Brilliant.
- ★★★★☆Janet W.11/02/2026Takes 3-4 weeks to work
Patience required. Nothing for 3 weeks then quite dramatic improvement in sleep quality. Stick with it.
- ★★★★★Sarah M.Verified buyer03/02/2026Game changer for my sleep
Been taking this for 6 weeks now. My sleep has genuinely improved — I fall asleep faster and wake up feeling more rested. The glycinate form doesn't cause any digestive issues like the cheap oxide versions I've tried before. Worth every penny.
- ★★★★★Victoria P.Verified buyer25/01/2026Essential supplement
Magnesium deficiency is incredibly common and this form is genuinely superior. My sleep improved, anxiety reduced, and muscle cramps gone.
- ★★★★☆Deborah A.Verified buyer18/01/2026Good but pricey for long-term use
Works really well — calm, better sleep. Just expensive to take 2 capsules daily long term. Would be 5 stars at a lower price.
- ★★★☆☆Rachel P.10/01/2026OK but expensive
Does what it says but quite expensive compared to high street options. Quality seems good though and the glycinate form is definitely gentler on my stomach.
- ★★★☆☆Carol T.27/12/2025Took a while to see results
Took 6 weeks before any noticeable difference. Better sleep but not dramatic. Still giving it more time.
- ★★★★★James T.Verified buyer21/12/2025Finally a magnesium that works
Tried three other brands before this. The glycinate form makes all the difference — no laxative effect, actually absorbs. My muscle cramps after running have completely stopped. Would recommend to anyone who's been disappointed by other magnesium supplements.
- ★★★★★Susan F.Verified buyer12/12/2025Reduced my migraines
Neurologist suggested magnesium for migraines. After 3 months on this my migraine frequency dropped from 3/month to 0-1/month.
- ★★★★★Michael B.05/12/2025Doctor recommended, great quality
My GP mentioned I was deficient and recommended glycinate form specifically. This is the best value quality glycinate I found. 400mg elemental per serving is proper clinical dose, not the watered down stuff.
- ★★★★★Peter C.Verified buyer16/11/2025My whole family takes this
Started taking for sleep, recommended to wife (improved PMS symptoms) and elderly father (reduced muscle cramps). Premium supplement.
- ★★★★★Robert G.Verified buyer28/09/2025Better than prescription sleep aid
Had zopiclone for years. Came off it with help from GP and used magnesium glycinate + sleep hygiene. Genuinely works.
- ★★★★★Kenneth R.Verified buyer18/09/2025Life changing for anxiety
Chronic anxiety sufferer. Magnesium glycinate alongside therapy has made a noticeable difference to my baseline anxiety levels.
- ★★★★★John M.Verified buyer25/06/2025Recommended by my chiropractor
Chiropractor recommended for my back spasms. The muscle relaxing effects are genuine. Sleep much better too.
- ★★★★★Patricia H.Verified buyer24/06/2025Best sleep supplement out there
Tried everything — melatonin, valerian, lavender. This is the only thing that's made a consistent, real difference to my sleep.
- ★★★★★Tracey M.Verified buyer10/06/2025GP approved alternative to meds
My GP suggested magnesium as a first-line approach before considering medication for my restlessness. This solved the problem.
- ★★★★★Edward L.Verified buyer06/06/2025Couldn't sleep for months
Desperate after months of poor sleep. This was recommended by a functional medicine doctor. Changed my life within 2 weeks.
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