THORNE Advanced Iron Complex Chelated Iron Supplement, 60 Capsules — 36 mg Bisglycinate, B Vitamins & Vitamin C

THORNE Advanced Iron Complex is a chelated iron supplement delivering 36 mg of well-absorbed iron bisglycinate per capsule, paired with B vitamins and vitamin C to support efficient iron uptake.*

This capsule formula from THORNE combines iron in a gentle, non-constipating bisglycinate form with methylcobalamin (B12), pyridoxal 5'-phosphate (B6), folate as L-5-MTHF, and vitamin C to promote better absorption. The product is manufactured under rigorous quality controls and undergoes multiple laboratory tests, making it a practical option for adults who need supplemental iron while minimizing digestive discomfort.

How much elemental iron does each capsule provide and in what form?

Each capsule supplies 36 mg of elemental iron delivered as iron bisglycinate (a chelated form). Bisglycinate iron bonds iron to amino acids, which often helps reduce stomach upset and constipation compared with some other iron salts.

• 36 mg elemental iron per capsule
• Iron bisglycinate (chelated) for milder gastrointestinal effects
• Capsule format for simple daily dosing

Which additional nutrients are included and why?

THORNE pairs iron with supporting cofactor nutrients—vitamin C to aid iron uptake, methylcobalamin (B12), pyridoxal 5'-phosphate (active B6), and folate as L-5-MTHF—to create a complementary nutrient profile. These cofactors help metabolic pathways that use iron and support overall nutritional balance.

• Vitamin C included to enhance non-heme iron absorption
• B12 as methylcobalamin for biologically active support
• B6 as P5P and folate as L-5-MTHF for bioavailable B-vitamin support

Will this iron supplement cause constipation or stomach upset?

The formula uses iron bisglycinate, which is often reported to be better tolerated than traditional iron salts. While individual reactions vary, many users find chelated iron easier on the digestive system and less likely to cause constipation.

• Chelated bisglycinate chosen for gentler digestion
• No bulk fillers that commonly increase gastrointestinal issues
• Capsule delivery helps control individual dosing

How does THORNE ensure product quality and consistency?

THORNE applies multiple rounds of laboratory testing to each product, validating raw-material purity and finished-product shelf stability. The company also has a reputation for sports and clinical practitioner trust, reflecting broad professional use and independent consumer recognition.

• Four rounds of testing from raw ingredient to finished formula
• Manufactured under strict quality standards and traceability
• Used by professional teams and recommended by clinicians

Who is this for: THORNE Advanced Iron Complex is designed for adults seeking a well-absorbed iron supplement with supporting B vitamins and vitamin C, especially those who prefer a chelated, less-irritating iron option. It’s suitable for individuals looking for clinically oriented manufacturing standards and higher-quality ingredient forms; consult a healthcare professional for personalized dosing and to address specific health concerns or lab-based needs.*

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.