the boutique
Thorne Iron Bisglycinate

Thorne

Iron Bisglycinate

£20.00

Thorne Iron Bisglycinate is a daily iron supplement providing 25 mg of elemental iron per capsule in the form of Ferrochel iron bisglycinate, a chelated form of iron studied for superior absorption and minimal gastroint…

  • Chelated iron that is gentle on the digestive system
  • Supports red blood cell formation and oxygen transport
  • May reduce tiredness and fatigue from low iron
  • Suits athletes, women, and plant-based diet followers
  • Transparent formulation with minimal inactive ingredients
4.9(35 reflections)
1

Secure checkoutFree delivery over £5030-day returns

ThorneIron Bisglycinate
1

Recommended Alongside

Vitamin D3 + K2 liquid drops

Vitamin D3 + K2 Liquid Drops deliver two fat-soluble nutrients that are commonly considered together: D3 as cholecalciferol — the form most readily converted a…

Welzo Akkermansia 60 Billion AFU Ultra Purity

60 billion AFU of Akkermansia muciniphila plus 64 billion CFU of Lactobacillus acidophilus, 700 mg berberine, 200 mg inulin, 2.4 mg astaxanthin, and chromium i…

Interested in more
personalised recommendations?

Set up your wai Profile to connect your wearables, biomarkers and test results. Create a bespoke plan based on your unique biology. Expert-led, evidence-based.

Set up Profile now

About This Product.

Thorne Iron Bisglycinate is a daily iron supplement providing 25 mg of elemental iron per capsule in the form of Ferrochel iron bisglycinate, a chelated form of iron studied for superior absorption and minimal gastrointestinal side effects compared with standard ferrous sulphate.

Iron is an essential mineral involved in red blood cell formation, normal energy metabolism, cognitive function, and the reduction of tiredness and fatigue. When levels fall — whether through heavy periods, a plant-based diet, athletic training, or poor absorption — the effects accumulate gradually: persistent fatigue, difficulty concentrating, and in some cases hair thinning. These are easy to miss or attribute to other causes, which is why a blood test to confirm ferritin or haemoglobin levels is always the right starting point.

This supplement suits those with confirmed or suspected iron insufficiency who have previously found iron supplements hard to tolerate. The bisglycinate chelate binds iron to two glycine molecules, protecting it from compounds in food that would otherwise block absorption, and this is the main reason it tends to cause far fewer digestive complaints than non-chelated forms.

The full ingredient list is transparent: iron bisglycinate, a hypromellose capsule, leucine, and silicon dioxide. No unnecessary fillers. Thorne is a brand with a longstanding reputation for formulation rigour, and this SKU is one of the most consistently recommended iron options in our clinic.

Iron (as Ferrochel Iron Bisglycinate) 25mg per capsule. Other ingredients: Hypromellose (derived from cellulose) capsule, Leucine, Silicon Dioxide.

Iron Bisglycinate

How to Take It

i.

Take one capsule daily, or as directed by your doctor. It can be taken with or without food. For best absorption, take alongside vitamin C and avoid consuming calcium-rich foods, dairy, or tea within an hour of your dose.

Frequently Asked.

Do I need a blood test before taking this?

We 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.

Why is bisglycinate better tolerated than standard iron supplements?

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.

Can I take this on an empty stomach?

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.

How long before I notice a difference?

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.

Is this suitable during pregnancy?

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.

You May Also Like

AEKE

AEKE K1 AI-Powered Smart Home Gym

Discover

Dryft

Dryft Sleep Mouth Tape Sleep Strips

Discover

Finding your calm in a stressful environment

We offer physician-led talks and events to help you learn more about how to deal with stress through movement, mindfulness, and refocusing.

Learn about our next event

Customer Reflections

Overall Sentiment

4.935 reflections
1 – 6 of 35 reflections
SK

Finally an iron supplement I can tolerate

4 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.

PM

Gentle on the stomach

4 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.

T

5 months ago

Does what it says. No side effects, levels back in normal range. Would buy again.

ER

Good supplement, slightly pricey for the capsule count

5 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.

AB

Noticed a real difference in energy

5 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.

JW

5 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.

Shop by Selection

immunity.beauty.longevity.

Test Before You Supplement.

A blood test is the only way to know what your body actually needs. We’ll tell you which of these supplements is right for you.

Find your panel

More From Thorne. View all