Compare every Iron Bisglycinate product across UK retailers on Suppio, ranked by true value - price per active dose, not pack size. Prices refreshed daily.
Chelated iron form with superior absorption and fewer digestive side effects
We rank Iron Bisglycinate by price per 14mg - not by pack size - so a bigger tub with a worse price per dose can't outrank a smaller one that's actually cheaper.
Iron Bisglycinate is a chelated form of iron. Chelated means the iron is chemically bonded to amino acids (the building blocks of protein), which protects the mineral and helps the body absorb it more easily.
It is used to increase iron levels in the body. Compared to standard iron, this version is chosen because it has superior absorption and causes fewer digestive side effects, such as nausea or stomach upset.
To make this supplement, manufacturers combine iron with glycine, which is a specific type of amino acid. This process creates a stable molecule that is then dried into a powder and put into capsules or tablets.
This ingredient is considered mid-range in price. This is because the chelation process used to bond the iron to amino acids is more complex and costly than the process used to make basic iron salts.
| Purpose | Typical studied dose | Evidence |
|---|---|---|
| preventing iron deficiency anemia in adolescents | 30 mg | established |
| improving blood-iron status in premenopausal women with iron deficiency without anemia | 27 mg per day | emerging |
| maternal blood parameters in pregnant women | 15 mg to 25 mg per day | established |
| preventing iron deficiency anemia in infants | 5 mg per kilogram of bodyweight per day (equivalent to 30-48 mg per day) | established |
| recovering iron stores post-donation | 30 mg to 60 mg of elemental iron | emerging |
| Form | What it is | Why chosen | Does it actually differ? |
|---|---|---|---|
| Iron | A general term for iron supplements, which often come as salts like ferrous sulfate or ferrous fumarate. | These are common, standard forms of iron used for replacement therapy. | Standard iron salts are more likely to cause stomach issues and are more easily blocked by things like phytates in cereals. |
| Iron Bisglycinate | A newer form of iron where the mineral is attached to two glycine molecules. | It is chosen for better absorption and fewer stomach side effects. | It has 2 to 3 times better bioavailability, is more effective at increasing hemoglobin in pregnant women, and is less affected by absorption inhibitors. |
Verdict: Iron Bisglycinate is worth seeking out because it is significantly better absorbed and easier on the stomach than standard iron salts.
Suppio matches identical products across UK retailers by barcode, then ranks by price per active dose rather than sticker price. Value rankings only ever include listings Suppio has independently verified against the live retailer page - unverified data is shown on each product’s own page but excluded from ranking.
Prices across our retailer network are refreshed at least daily.
Chelated iron form with superior absorption and fewer digestive side effects
We rank Iron Bisglycinate by price per 14mg - not by pack size - so a bigger tub with a worse price per dose can't outrank a smaller one that's actually cheaper.
Suppio matches identical products across UK retailers by barcode, then ranks by price per active dose rather than sticker price. Value rankings only ever include listings Suppio has independently verified against the live retailer page - unverified data is shown on each product’s own page but excluded from ranking.
Prices across our retailer network are refreshed at least daily.