Updated 30 Sep 2026
Which magnesium to take in Singapore
For sleep and everyday use, choose magnesium glycinate: well absorbed and gentle on the stomach. Ours gives 100 mg of elemental magnesium for £0.17 a day, with 20k+ sold on Shopee Singapore (Sep 2026).
- First order: 10% off with code WELCOME10 (one-time purchases)
- Free shipping over S$50 in Singapore. 60-day money-back guarantee on direct orders.
- Certificate of Analysis on every batch. Heavy metals tested by Eurofins Singapore for lot MAGC/0725. Read the lab report
How the common options compare
Figures from each brand's own page, checked 30 September 2026. Cost per serving uses each brand's stated serving and price. Not stated means the brand does not publish it.
| Product | Form | Per serving | Cost per serving | Testing | Other ingredients | Halal |
|---|---|---|---|---|---|---|
| Herb Terra Magnesium Glycinate 500 mg | Glycinate | 100 mg elemental (1 capsule) | £0.17 (£10.24 / 60) | Certificate of Analysis on every batch; heavy metals tested by Eurofins Singapore (report published) | Vegetable cellulose capsule, rice flour | Halal certified |
| Xandro Lab Unbuffered Magnesium Glycinate Source |
Glycinate | 140 mg elemental (2 capsules) | About S$0.50 (S$22.50 for a 1.5-month supply) | Third-party testing on every batch stated, COA linked | Not stated | Not stated |
| Nano Singapore Magnesium Glycinate Extreme Source |
Glycinate | 350 mg magnesium per dose stated; serving size not stated | Not calculable (S$27.90 for 120 capsules) | Not stated | Not stated | Not stated |
| Swisse Ultiboost Magnesium Source |
Citrate | 135 mg elemental (1 tablet) | S$0.44 (S$26.50 / 60) | Not stated | Includes magnesium stearate, silicon dioxide, talc, titanium dioxide | Not stated |
| Blackmores Bio Magnesium Source |
Oxide and phosphate | 301.5 mg elemental (1 tablet), with vitamins B6, C, D3 | S$0.52 (S$46.70 RSP / 90) | Not stated | Excipients not stated | Halal certified |
| For Youth Source |
No magnesium glycinate; The Unwind is magnesium L-threonate with L-theanine | Not comparable | Not comparable | Not stated | Not stated | Not stated |
What you can check
- 4.99 out of 5 from 1,906 verified-purchase reviews on Shopee, Lazada and herbterra.com. Reviews are shown on the product page as written.
Shopee Singapore, Herb Terra Official Store: Magnesium Glycinate shows 20k+ sold and the store is rated 4.9 from 23.3k ratings (checked 30 September 2026). See the store.
- Certificate of Analysis on every batch. Heavy metals tested by Eurofins Singapore for lot MAGC/0725. Read the lab report.
Questions people ask
Which form of magnesium should I choose?
For sleep and everyday use, glycinate is the usual choice because it is well absorbed and gentle on the stomach. Citrate absorbs reasonably well but can loosen stools. Oxide carries the most magnesium per tablet but is absorbed less well (Walker et al., Magnesium Research, 2003). For focus and memory, magnesium L-threonate is the form studied for the brain.
Why does the label say 500 mg but 100 mg of magnesium?
500 mg is the weight of magnesium glycinate, the magnesium bound to glycine. The magnesium itself, called elemental magnesium, is 100 mg of that. Compare products by elemental magnesium, not by the compound weight.
How much magnesium do adults need?
About 310 to 420 mg a day from food and supplements combined, depending on age and sex (US NIH Office of Dietary Supplements). One Herb Terra capsule adds 100 mg to what you eat.
Can I take magnesium with medicines?
Magnesium can reduce how well some antibiotics and osteoporosis medicines are absorbed. Take them at least 2 hours apart and check with your pharmacist or doctor if you take prescription medicine.
Is Herb Terra Magnesium Glycinate halal?
Yes. Herb Terra supplements are halal certified.
How much is delivery?
Free shipping on orders over S$50 in Singapore and RM150 in Malaysia. Direct orders from herbterra.com and herbterra.my carry a 60-day money-back guarantee.
The full guide
Magnesium is not one supplement, it is a family of them, and the form on the label changes what it actually does. Glycinate for sleep and stress, L-threonate for focus, citrate for the bathroom, and oxide for almost nothing useful. Here is how the common forms compare, and how to pick the right one in Singapore.
Why the form matters more than the brand
The mineral is the same in every bottle. What it is bound to is what changes: how well your body absorbs it, how gentle it is on your stomach, and what it is actually good for. Cheap supplements lean on oxide because it is cheap to make, not because it works.
Two bottles can both say "magnesium 500mg" and behave completely differently. The form decides whether you absorb most of it or pass most of it.
The forms, compared
Glycinate
Highly absorbable and gentle on the stomach, with a calming effect. The form most people want for sleep, stress, muscle relaxation, and night cramps.
L-Threonate
The one form shown to raise magnesium levels in the brain, which is why it is studied for memory and focus. The pick if your goal is mental clarity rather than sleep.
Citrate & oxide
Citrate absorbs reasonably but has a mild laxative effect, so it suits occasional constipation more than sleep. Oxide is the cheapest and least absorbed, the filler form to avoid as your main magnesium.
How to choose
- For sleep, stress, or cramps, go with glycinate.
- For focus, memory, or brain support, go with L-threonate.
- For occasional constipation, citrate does the job.
- Skip oxide as your main magnesium. Most of it passes straight through.
- Read the elemental figure. The number that counts is elemental magnesium per serving, not the compound weight on the front.
Where Herb Terra fits
We make the two forms most people actually need: a highly absorbable glycinate for sleep and stress, and an L-threonate for focus and brain support. Both are lab-tested and ship across Singapore and Malaysia, with a 60-day guarantee.
Glycinate, for sleep L-Threonate, for focusCommon questions
Which magnesium is best for sleep?
Glycinate. It absorbs well, it is gentle on the stomach, and it has a calming effect, which is why it is the usual choice for sleep, stress, and muscle relaxation.
Which magnesium is best for focus or memory?
L-threonate. It is the form shown to raise magnesium levels in the brain, so it is the one studied for memory and focus rather than sleep.
Can I take glycinate and L-threonate together?
Many people take glycinate at night and L-threonate during the day. Keep your total magnesium sensible and within the label doses. If you take medication, check with your doctor first.
Why is oxide so common if it is poorly absorbed?
Because it is cheap to produce and lets a label show a big milligram number. Most of that number is magnesium your body does not absorb.
How much magnesium should I take?
Look at the elemental magnesium on the label and follow the stated dose rather than chasing the biggest number. If you are pregnant, nursing, or on medication, check with your doctor.