Free UK delivery on orders over £50Doctor-guided selectionReviewed by a GMC-registered clinicianBuy 3, get 1 free on selected supplementsFree UK delivery on orders over £50Doctor-guided selectionReviewed by a GMC-registered clinicianBuy 3, get 1 free on selected supplements

Why The Wellness recommends this

Curated, not stocked.

Magnesium is one of the nutrients our clinicians most frequently identify as low on blood testing, particularly in people with disrupted sleep, muscle cramps, or high stress. We chose Terranova for its no-filler formulation philosophy and its use of multiple magnesium forms. It earns its place on our shelves because it is the kind of straightforward, well-formulated supplement our doctors are comfortable recommending by name.

About this product

Magnesium Complex

Terranova Magnesium Complex is a multi-form magnesium supplement designed to support the body's broad need for this essential mineral. Magnesium is involved in over 300 enzymatic processes, including energy metabolism, muscle contraction and relaxation, nerve signalling, and the regulation of sleep. By combining more than one form of magnesium, this product aims to improve absorption and cover a wider range of physiological functions than a single-form supplement typically would.

It suits people who experience muscle tension, poor sleep quality, or high physical or mental stress loads — all scenarios where magnesium status is commonly depleted. Athletes in heavy training, those with high caffeine or alcohol intake, and individuals eating a low-vegetable diet are particularly prone to insufficiency. A blood test measuring serum or red-cell magnesium can confirm whether supplementation is warranted; this is something our clinicians can help you assess.

Terranova is a brand our doctors rate for its approach to formulation: the range avoids unnecessary fillers and uses nutrient forms that are well-regarded for bioavailability. As with any mineral supplement, it fits best within a routine built around identified need rather than guesswork.

What it does

Benefits

  1. 01

    Multi-form magnesium to broaden absorption and coverage

  2. 02

    May support muscle relaxation and reduce tension

  3. 03

    Studied for sleep quality and nervous system calm

  4. 04

    Relevant for athletes and those under sustained stress

  5. 05

    Addresses common dietary insufficiency in magnesium

Get the most from it

How to use

Take 2 capsules daily. Magnesium is generally well tolerated with food, which may also reduce the chance of loose stools — a known side effect at higher intakes. If you are taking it specifically for sleep support, taking the dose in the evening is a common approach.

What's inside

Ingredients

View full ingredient list

Magnesium complex blend

Common questions

Frequently asked

Why take a multi-form magnesium rather than a single form?

Different forms of magnesium are absorbed and utilised by the body in slightly different ways. A blend may offer broader physiological coverage compared to a single-form supplement, though individual response varies.

How long before I notice a difference?

For sleep and muscle tension, some people notice a change within one to two weeks of consistent use. Correcting a genuine deficiency typically takes longer — retesting magnesium levels after two to three months gives a clearer picture.

Can magnesium cause digestive side effects?

Some forms of magnesium can have a laxative effect at higher doses. Taking capsules with food generally reduces this. If loose stools occur, try splitting the dose across the day.

Is this suitable to take alongside other supplements or medications?

Magnesium can interact with certain medications, including some antibiotics, bisphosphonates, and diuretics. If you are on prescription medication, check with your GP or pharmacist before starting.

Do I need to confirm a deficiency before taking this?

It is not strictly required, but it is the more informed approach. A blood test can identify whether your magnesium levels are genuinely low, which helps justify supplementation and track progress. Our clinic can arrange this for you.

Doctor-guided care

Test before you supplement.

Bloods are the only way to know what your body actually needs. We'll tell you which of these supplements earn their place.

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TERRANOVA Magnesium Complex

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