Magnesium Hydroxide

Relieve acid reflux and support digestive comfort with alkalising magnesium

★★★★★ Rated 4.6/5 "Excellent" on Trustpilot
  • Relieves reflux and heartburn naturally
  • Regular bowels and comfortable digestion
  • Gentle alkalising effect on the gut
90 capsules
90 day supply

per day

Guaranteed additive free
Highest purity
Therapeutically effective

★★★★★ "I won't go back to high street supplements. The difference in quality is something you can actually feel." Susie

Have questions about Magnesium Hydroxide?

"Is this mainly for constipation or does it help with other things too?"

"I already take magnesium bisglycinate for sleep. Can I add this for constipation without taking too much?"

"I'm already taking magnesium bisglycinate at night. Can I add this in the morning?"

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Each capsule provides 144mg of elemental magnesium from magnesium hydroxide, one of the highest elemental magnesium doses per capsule in the range. Magnesium hydroxide is traditionally used as an antacid and gentle osmotic laxative, and in supplement form it serves a dual purpose: providing meaningful systemic magnesium alongside gastrointestinal benefits for those who experience acid reflux, heartburn or constipation.

When magnesium hydroxide encounters stomach acid, it reacts to form magnesium chloride and water, neutralising excess acid in the process. The magnesium chloride produced is then available for absorption. Any unabsorbed magnesium hydroxide passes to the intestines where it draws water by osmosis, softening stool and supporting regular bowel movements. This dual action makes it a practical choice for older adults or anyone who needs magnesium supplementation alongside digestive comfort. The vegetarian capsule shell is hydroxypropyl methylcellulose.

Take 1 capsule per day with food.

Taking with a meal ensures optimal conditions for the conversion to absorbable magnesium chloride and provides the acid neutralising benefit at the time it is most useful. If using specifically for constipation support, the capsule can be taken in the evening to encourage a morning bowel movement.

For those primarily seeking magnesium for muscle relaxation, sleep or stress without the gastrointestinal effects, Magnesium Bisglycinate or Magnesium Malate may be more appropriate choices. Magnesium Hydroxide is the best fit when antacid support and gentle bowel regulation are also desired alongside systemic magnesium replenishment.

Each capsule contains: %NRV*
Magnesium 144 mg 38%

† Nutrient Reference Value (NRV*) not established

Magnesium Hydroxide, Hydroxypropyl Methylcellulose (capsule).

Recommended dose: 1 capsule per day with food.

Magnesium Hydroxide, Hydroxypropyl Methylcellulose (capsule).

Recommended dose: 1 capsule per day with food.

  • Suitable for men.

  • Suitable for women.

  • Suitable for people under sixteen years of age.

  • If pregnant or breastfeeding consult your healthcare professional before purchasing and consuming this product.

  • Suitable for vegetarians.

  • Suitable for vegans.

  • No gluten containing ingredients.

  • No nut containing ingredients.

  • No dairy containing ingredients.

If you are taking medication consult your prescribing physician before purchasing and consuming supplements.

Store in a cool dry place.

Keep out of reach of children.

Information displayed does not constitute medical advice.

This product should not be used as a substitute for a varied diet.

Once opened, consume within 3 months.

Magnesium Hydroxide
Quality manufacturing

Quality promise

Why clinical grade matters

  • GMP certified, pharmaceutical grade manufacturing
  • Made in UK cleanroom facilities, ISO 9001 & ISO 14001 accredited
  • No fillers, binders or additives — only active ingredients
  • Fully traceable from raw material to finished product
  • Non-GM, non-irradiated, 100% green energy manufacturing
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Frequently asked questions

What is Magnesium Hydroxide good for?

Magnesium Hydroxide supports relaxation, sleep quality, muscle recovery, and stress resilience. Magnesium is involved in over 300 enzymatic reactions.

When should I take Magnesium Hydroxide?

Take in the evening, 30-60 minutes before bed for sleep support.

What are signs I might need magnesium?

Common signs include muscle cramps, poor sleep, anxiety, fatigue, and tension headaches.

Can I take magnesium with other supplements?

Yes, magnesium pairs well with vitamin D, zinc, and B vitamins. Space from calcium by 2 hours for optimal absorption.

How long until I notice results?

Many people notice improved sleep and relaxation within 1-2 weeks. Full benefits develop over 4-8 weeks of consistent use.

What makes this form of magnesium different?

Different forms have different benefits. Bisglycinate is best for sleep and relaxation, citrate for constipation, and malate for energy.

Magnesium Hydroxide

Magnesium Hydroxide

£24.06