Iron Bisglycinate 25 mg by Thorne

Choose iron bisglycinate if your Ferritin (the iron storage protein) is low or your CBC hemoglobin (the oxygen‑carrying protein on a blood count) runs low‑normal with fatigue. It fits menstruating adults with heavy periods, frequent blood donors, endurance athletes, vegans, and those after bariatric surgery. If you take acid‑reducing meds, absorption is often better with this form. For established deficiency, expect 4 to 12 weeks before Ferritin climbs; severe anemia usually needs higher or prescription iron under clinician care.

Ferrous bisglycinate is iron bound to two glycine molecules, which helps it pass through the gut more efficiently and with fewer free iron reactions that irritate the stomach. Compared with ferrous sulfate, it’s typically gentler and less constipating at the same elemental iron dose. Better absorption means more iron delivered to the bone marrow to build red blood cells, which can normalize Transferrin saturation (how full your iron carrier is) and raise Ferritin over time.

Take one capsule daily, ideally on an empty stomach with vitamin C or orange juice to improve absorption. If it upsets your stomach, take with a small meal that is low in calcium. Keep coffee, tea, dairy, calcium supplements, and high‑dose magnesium at least two hours away. Recheck Ferritin and a CBC after 6 to 8 weeks to gauge response. If your levels are very low, your clinician may recommend a higher total daily iron dose temporarily.

Separate iron 2 to 4 hours from levothyroxine, tetracycline or quinolone antibiotics, and oral bisphosphonates, since iron blocks their absorption. Black stools and mild constipation are common and not dangerous; severe abdominal pain is not typical. Skip iron if your Ferritin is high, you have hemochromatosis (a genetic iron overload), chronic liver iron overload, or repeated transfusions. Pregnancy requires individualized dosing—use iron only under clinician guidance. Thorne’s NSF Certified for Sport® status suits tested athletes.