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Thorne Ferrasorb® Iron Support Complex

A highly absorbable iron formula with Ferrochel® iron, vitamin C, and active B vitamins to support healthy iron levels, energy, and red blood cell production. Gentle on the stomach for daily use.

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4 Rounds of Testing

  • ROUND 1

    Raw materials and components

  • ROUND 2

    In-process testing

  • ROUND 3

    Finished product testing

  • ROUND 4

    Stability testing

    Suggested Use & Dosage

    Take 1 capsule one to three times daily, or as directed by your healthcare professional. Each capsule is easy to swallow and designed for convenient daily use. Capsule size: 0.709 in / 18.0 mm.

    New & Old Packaging Mixed – Thorne Ferrasorb®

    This product may arrive in either the new or old packaging as Thorne transitions to an updated design. Both versions contain the same trusted formula and quality ingredients. Orders may include a mix of packaging during this period, but product performance remains unchanged.

    Energy & Iron Support Complex

    An easy-to-swallow formula featuring 36mg of highly absorbable iron bisglycinate, combined with active folate, vitamin B6, B12, and vitamin C to support iron absorption and help maintain energy and overall vitality.

    We’ve Proven Better Is Possible.

    • Our rigor

      Our supplements go through four rounds of testing, ingredient validation, and trusted third-party certifications.

    • Our expertise

      Decades of clinical experience drive product development, translating research into bioavailable formulations.

    • Our guidance

      Build a routine that actually works for you based on personalized recommendations backed by scientific data.

      "Recommended by my nutritionist Thorne's Advanced Iron Complex is economical and lives up to its reputation. I only experience good results; it never upsets my bowel activity. I feelI can count on the supplement to continue to be of excellent quality in meeting the needs of my body in in meeting the needs of my body indealing with anemia."

      - Rhonda B.

      Trusted Performance & Proven Quality

      A top-rated healthcare practitioner–recommended brand with strong consumer trust and satisfaction. Backed by 45K+ health professionals, 100+ sports teams, 10K+ pro athletes, and U.S. National Teams.

      Recognized for manufacturing excellence in GMP-certified facilities, with multiple ConsumerLab.com awards and official partnerships including the UFC.

      Made in the USA using both U.S. and imported high-quality ingredients, ensuring consistent safety, purity, and performance.

      Elite Quality & Testing Excellence

      Thorne is committed to the highest standards in ingredient purity, manufacturing, and quality control. With 100,000+ tests conducted annually in advanced labs, every product is carefully verified for safety, consistency, and performance.

      Effective Ingredients

      + Ironis essential to the formation and function of healthy red blood cells*

      + Reduced GI side effects, such as nausea and constipation*

      + Provides 36 mg of elemental iron per capsule as Ferrochel® chelate

      + Active forms of vitamins B12, B6, and folate, with vitamin C for an enhanced approach to red blood cell health*

      Elite Quality & Testing Excellence

      Thorne is committed to the highest standards in ingredient purity, manufacturing, and quality control. With 100,000+ tests conducted annually in advanced labs, every product is carefully verified for safety, consistency, and performance.

      Certified Quality

      • Manufacturing excellence

        Thorne has an exemplary record of compliance with standards set by the FDA.

      • Trusted certification

        Thorne’s campus is certified by NSF, the “gold standard” for quality in dietary supplements.

      • Global recognition

        Thorne has an A rating from Australia’s TGA, the toughest regulatory agency in the world.

      • GRMA certified

        GRMA recognizes companies that go beyond the minimum requirements for good manufacturing practices.

        Certified Quality

        • Manufacturing excellence

          Thorne has an exemplary record of compliance with standards set by the FDA.

        • Trusted certification

          Thorne’s campus is certified by NSF, the “gold standard” for quality in dietary supplements.

        • Global recognition

          Thorne has an A rating from Australia’s TGA, the toughest regulatory agency in the world.

        • GRMA certified

          GRMA recognizes companies that go beyond the minimum requirements for good manufacturing practices.

          Customer Reviews

          FAQs & Answers

          What nutrients are included besides iron?

          It also contains vitamin C, active folate, vitamin B6, and vitamin B12 to support absorption and blood health.

          When is the best time to take it?

          It is typically taken between meals for optimal absorption, or as directed by a healthcare professional.

          Who should consider taking Ferrasorb?

          People with low iron levels, increased iron needs, or those looking for gentle iron support may benefit.

          Does it cause constipation?

          It is generally less likely to cause constipation compared to traditional iron supplements due to its gentle form.

          Can it be taken with coffee or dairy?

          It’s best to avoid coffee, tea, or dairy close to dosing time, as they may reduce iron absorption.