THORNE Advanced Iron Complex Chelated Iron Supplement, 60 Capsules with B Vitamins

THORNE Advanced Iron Complex is a chelated iron supplement formulated to support iron intake, with 36 mg of elemental iron in each capsule.

• Iron bisglycinate — provides iron in a well-absorbed form described as non-constipating.
• Vitamins B6, B12, B9, and C — combines B vitamins with vitamin C to support iron absorption.
• Four rounds of product testing — covers raw-material purity through finished-formula shelf life.
• Trusted by 100+ professional sports teams — also ranked the #1 most recommended clinical brand by consumers and health-care practitioners in a 2026 independent U.S. survey.

Iron is an essential nutrient, and low iron may be associated with weakness, fatigue, shortness of breath, dizziness, drowsiness, irritability, and infrequent menstruation. Nearly 1 in 3 adults in the U.S. may have low iron levels. THORNE Advanced Iron Complex brings iron together with supporting vitamins in capsule form for people looking to add an iron supplement to their routine.

What form of iron does Advanced Iron Complex contain?

It contains iron bisglycinate, a chelated form of iron. The formula pairs this iron with vitamins B6, B12, and B9, as well as vitamin C, to support iron absorption. Vitamin B6 is pyridoxal 5'-phosphate, vitamin B12 is methylcobalamin, and vitamin B9 is folate as L-5-MTHF.

• Iron is supplied as iron bisglycinate.
• Folate is provided as L-5-MTHF.
• The formula combines iron with three B vitamins and vitamin C.

How does THORNE test this supplement?

THORNE performs four rounds of testing on every product. The testing process checks raw materials for purity and confirms the shelf life of the finished formula, covering checks from ingredient inputs through the completed product.

• Testing begins with raw-material purity analysis.
• Finished-formula shelf life is also confirmed.

How many capsules are in the bottle?

Each bottle contains 60 capsules. The formula is made for adults seeking an iron supplement that also supplies B vitamins and vitamin C; it does not replace an individualized assessment of iron needs.

• 60 capsules per bottle.
• Each capsule contains the same iron-and-vitamin formula.

THORNE Advanced Iron Complex suits adults who want a capsule combining chelated iron with selected B-vitamin forms and vitamin C. Its defined iron form, complementary vitamins, and four-stage testing process make it a straightforward option for adding these nutrients to a supplement routine.

Ingredients

One Capsule Contains: Vitamin C (as Ascorbic Acid) 15 mg, Vitamin B6 (as Pyridoxal 5'-Phosphate) 5 mg, Folate (400 mcg as L-5-Methyltetrahydrofolate from L-5-Methyltetrahydrofolic Acid, Glucosamine Salt) 667 mcg DFE, Vitamin B12 (as Methylcobalamin) 300 mcg, Iron (as Ferrochel® Ferrous Bisglycinate Chelate) 36 mg. Other Ingredients: Hypromellose (derived from cellulose) capsule, Microcrystalline Cellulose, Leucine, Silicon Dioxide.