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Thorne Iron Bisglycinate provides 25 mg of elemental iron per capsule as Ferrochel, a chelated form of iron bound to the amino acid glycine.
£20
Thorne Iron Bisglycinate provides 25 mg of elemental iron per capsule as Ferrochel, a chelated form of iron bound to the amino acid glycine.
Thorne Iron Bisglycinate provides 25 mg of elemental iron per capsule as Ferrochel, a chelated form of iron bound to the amino acid glycine. The chelated form is absorbed through a different pathway from standard iron salts, which is why it tends to produce less nausea and constipation than ferrous sulphate, the form most associated with digestive complaints.
Take one capsule daily, or as advised by your clinician. Iron absorbs best away from tea, coffee and calcium supplements. Excess iron is harmful: do not exceed the stated dose, and keep out of reach of children.
Iron contributes to the normal formation of red blood cells and haemoglobin, normal oxygen transport, normal cognitive function, normal energy-yielding metabolism and the reduction of tiredness and fatigue. Low iron is one of the most common nutritional shortfalls, particularly in menstruating women, vegetarians and endurance athletes.
This formula is NSF Certified for Sport, meaning every batch is independently tested for substances banned in competition.
Who it suits: anyone with a confirmed or suspected low iron intake who has found standard iron supplements hard to tolerate. Iron supplementation should follow a blood test where possible, and too much iron is harmful, so keep out of reach of children and check with a clinician if unsure.
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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Your first order creates it. Add your blood results or a wearable, and a doctor can recommend what suits you.
Sign inWe strongly recommend one. Iron is a nutrient where both deficiency and excess matter clinically. A simple ferritin or full blood count test confirms whether supplementation is appropriate and gives you a baseline to measure against. Taking iron without knowing your levels means supplementing blind.
Most low-cost iron supplements use ferrous sulphate, which is poorly absorbed and can cause nausea, cramping, and constipation. Bisglycinate is a chelated form — the iron is bound to glycine molecules — which protects it from compounds in food that block absorption and tends to produce far fewer digestive side effects.
Yes. Unlike ferrous sulphate, chelated iron bisglycinate is generally well tolerated on an empty stomach, though you can take it with food if you prefer. Avoid taking it at the same time as calcium supplements, dairy, or tea, as these can reduce absorption.
Iron levels typically take several weeks to shift meaningfully. Most people notice improved energy and reduced fatigue after four to eight weeks of consistent use, though this depends on how depleted your stores were to begin with. A follow-up blood test at around three months gives a clear picture of progress.
Iron requirements increase significantly during pregnancy, but dosing should be guided by your midwife or doctor based on your blood results. Consult your healthcare practitioner before starting or continuing any iron supplement if you are pregnant or breastfeeding.
Overall
6 months ago
Had been struggling with ferrous sulphate for years — the constipation and nausea were just not worth it. Switched to this after my GP flagged low ferritin and it's been a different experience entirely. No stomach issues at all. Taking it every morning with a glass of orange juice. Ferritin up from 14 to 38 after three months.
6 months ago
Vegetarian and always struggled to keep my iron levels up. This has been easy to take daily and I haven't had any of the usual digestive grumbles. Noticed my energy picking up after about six weeks.
6 months ago
Does what it says. No side effects, levels back in normal range. Would buy again.
6 months ago
Works well and I've had zero gut issues compared to the cheap iron I was taking before. My main gripe is the value — 60 capsules at this price feels a bit steep when you're taking it long-term. Will keep buying it because it actually agrees with me, but wish they did a larger bottle.
7 months ago
Doctor confirmed I was low in iron after feeling exhausted for months. Started these and within about five or six weeks I was genuinely feeling more like myself. No bloating, no constipation. Really pleased.
7 months ago
Been taking this before bed for a couple of months. Sleep's fine, no nausea, and my last blood test showed ferritin had climbed nicely. Solid product.
Biomarker check, £350MaryleboneSee your vitamin D, iron and B12.At our clinic in Marylebone, London, doctors also offer private blood tests and longevity medicine.
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