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Thorne Calcium provides calcium in the form of dicalcium malate, a chelated compound in which calcium is bound to malic acid.
£25
Thorne Calcium provides calcium in the form of dicalcium malate, a chelated compound in which calcium is bound to malic acid.
Thorne Calcium provides calcium in the form of dicalcium malate, a chelated compound in which calcium is bound to malic acid.
Take 2 capsules twice daily, as directed on the packaging. Calcium is generally better absorbed when taken in divided doses rather than a single large dose, so splitting intake across two sittings is sensible. Taking it with food may improve tolerance and absorption.
Thorne Calcium provides calcium in the form of dicalcium malate, a chelated compound in which calcium is bound to malic acid. Chelated forms are generally considered more soluble than calcium carbonate, which may support better absorption - a relevant distinction for anyone who has been told their dietary intake is insufficient or whose blood work suggests low bone mineral density risk.
Calcium is the primary mineral in bone tissue and plays a central role in skeletal maintenance throughout life. Beyond the skeleton, calcium is involved in muscle contraction, nerve signalling, and normal blood clotting. Most people obtain some calcium from dairy, fortified foods, or leafy greens, but requirements can outpace diet during adolescence, pregnancy, post-menopause, and in those following a vegan or dairy-free pattern.
This supplement suits adults looking to close a confirmed dietary gap rather than those self-supplementing without context. A blood or DEXA-informed approach is worth considering before starting, as excess calcium carries its own risks, particularly in those with a history of kidney stones or certain cardiovascular conditions.
Thorne is a brand with a reputation for formulation rigour and transparent ingredient selection, which is part of why it features across several of our doctor-led protocols. The use of dicalcium malate rather than carbonate forms reflects a deliberate formulation choice that aligns with what our clinicians look for in a calcium supplement.
Standard UK delivery included on every order, 1 to 3 working days after dispatch.
Next working day for £25 when you order by 12pm. Orders placed before 12pm on a working day leave the same day. Later orders leave the next working day.
You can return unopened and unused items within 30 days of delivery. This does not affect your statutory rights. Read the delivery and returns terms
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Sign inCalcium carbonate is the most common and inexpensive form, but it requires adequate stomach acid for absorption and can cause bloating in some people. Dicalcium malate is a chelated form bound to malic acid, which is generally considered more soluble and may be better tolerated, particularly for those with lower stomach acid.
It is worth knowing your baseline before supplementing calcium long-term. A clinician can assess dietary intake, relevant blood markers, and bone health risk factors to confirm whether supplementation is appropriate for you. Taking more calcium than needed — particularly without adequate vitamin D — is not without risk.
Vitamin D supports calcium absorption in the gut, so the two are often used together in bone health protocols. Check with your clinician or GP if you are already taking a combined calcium and vitamin D product to avoid unintentional doubling up.
Those with a personal or family history of kidney stones, hypercalcaemia, or certain cardiovascular conditions should speak to a doctor before starting. Calcium can also interact with some medications, including certain antibiotics and thyroid drugs, so check with your pharmacist if you are on prescription medicines.
Bone mineral density changes slowly and is not something you will feel day to day. If you are supplementing to address a confirmed deficiency or support long-term bone health, consistent daily intake over months — combined with weight-bearing exercise and adequate vitamin D — is the relevant timeframe. Follow-up with a clinician or repeat DEXA scan is the only reliable way to track progress.
Overall
6 months ago
I take this alongside my vitamin D and magnesium after breakfast. Easy to swallow, no chalky aftertaste — that was my main concern after years of carbonate-based supplements. Three months in and my follow-up bloods showed things moving in the right direction.
6 months ago
Just started taking these after my GP flagged low calcium on a routine blood panel. Only a couple of weeks in so can't speak to long-term changes, but the tablets are easy to swallow, no chalky aftertaste, and no digestive upset — which I did get with a carbonate form I tried years ago. Early signs are promising.
6 months ago
My GP flagged low bone mineral density at my last check. Did some digging before choosing and the form of calcium here seemed worth the extra few quid over bog-standard carbonate. No digestive issues whatsoever, which I was slightly worried about.
6 months ago
Been taking this for about six weeks now, fits into my routine easily. Take two with dinner, no issues.
6 months ago
The quality is there and I haven't had any of the constipation I used to get with cheaper calcium tablets. My only gripe is the bottle doesn't last a full month if you're taking the higher end of the dose — means I'm reordering more often than expected.
7 months ago
Used to take a calcium carbonate tablet from the supermarket — switched to this after reading about chelated forms being easier on the gut. It's a noticeable difference for me. Stomach feels fine even if I take it without much food.
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