THORNE - Iron Bisglycinate - 25 mg Iron Supplement for Enhanced Absorption Without Gastrointestinal Side Effects - NSF

After struggling with iron deficiency for years and experiencing terrible digestive issues with traditional iron supplements, I was hesitant to try yet another product. However, THORNE's Iron Bisglycinate has been a complete game-changer for me. The chelated form truly delivers on the promise of enhanced absorption without the gastrointestinal distress that plagued me with other iron products. What sets this apart is the bisglycinate form - iron bound to the amino acid glycine. This makes it much gentler on the stomach while actually improving bioavailability. I take it on an empty stomach without any nausea, constipation, or stomach upset that I experienced with ferrous sulfate supplements. This alone makes it worth the premium price. The 25mg dosage is perfect for maintenance and gradual improvement. My recent blood work showed steady improvement in iron levels after three months of consistent use, and my doctor was pleased with the progress. I have more energy throughout the day and don't experience the afternoon fatigue that was becoming problematic. THORNE's reputation for quality and third-party testing gives me confidence in what I'm taking. The capsules are easy to swallow, and the bottle is clearly labeled with expiration dates and batch information. No artificial colors, flavors, or unnecessary additives - just pure, effective iron supplementation. While more expensive than drugstore iron supplements, the superior absorption and lack of side effects make this significantly better value in terms of actual results and tolerability. Highly recommend for anyone who needs iron supplementation but has struggled with digestive issues from other products. Read more

I absolutely love Throne Iron vitamins! I’ve tried other iron supplements before, but they often upset my stomach or had a metallic taste. These are completely different—super gentle, easy to swallow, and no unpleasant aftertaste. Within a couple of weeks, I noticed a real difference in my energy levels and overall well-being. I feel less fatigued and more focused throughout the day. Plus, I appreciate that Throne uses high-quality, clean ingredients without unnecessary fillers. If you’re looking for an effective iron supplement that’s easy on digestion and actually works, this is the one! Highly recommend. Read more

This is my second order. After taking almost all of the first order, I am very pleased with its performance. No stomach upset or problem, good iron absorption, small - easy to take pills. Read more

The BEST iron supplement. My stomach is super sensitive and I take these on an empty stomach every morning without the slightest bellyache - perfect for anemia during pregnancy! This form is highly bioavailable and easily absorbed. I strongly recommend to anyone needing an iron supplement. Read more

I had severe anemia. Doctors told me take FE 65mg elemental iron. I could not tolerate those, even the "slow FE" type. I did my own research on brands, types of iron, bind agents, and helpers to potentate the iron. My symptoms were dizziness, fatigue, vertigo, nausea, neuropathy in my hands, constant stomach ache, and inability to eat much. I told the doctors my stomach didn't do well on the 65mg typical supplement. Based on the information I read (some from Thorne's own marketing team admittedly) I chose this product. So far, so good. Well tolerated and many of the above symptoms disappeared or abated. Why only 4 stars you ask, because with 25mg elemental iron this isn't meeting the dose I need to increase my blood iron levels a much a needed. To be fair, that my bodies fault for not tolerating 65 mg of elemental iron. My doc told me this wasn't good enough if it didn't have 50-65 elemental due to my need. It is obviously improving my anemia due to the rapid relief from symptoms I had for years. The doctor showed me a graph of the last 10 year iron levels from lab work. The wise in iron indeed is not dramatic yet. After reading reviews here I asked the nurse practitioner if I could try taking two of these a day before going to the harsher formulations. She said she didn't know and couldn't immediately find any reference on this formulation that met the office's standards for peer reviewed, published data. We know we often won't find that for supplements since there are no obscene profits or patents on vitamins and supplements (it's a crime they don't tell us the true requirements for vitamin D3 when 10,000IU a day could significantly boost immune in northern states in the winter). The NP said "I advise you to take one with 65mg. I can't say for sure if you should go off label with this formulation." I told her: "I'm going to try it because this has been a game changer in how I feel and has nearly no bad side effects. Just a couple days in to 2 a day. It bothers my stomach a bit more. In fact, about twice as much as one pill (go figure). I'm going to stick with because I think this 2 pills of Thorne Research - Iron Bisglycinate will bring 50 mg Iron Supplement in an effective formula. I just hope it isn't too much. I've bought several Thorne products and I am growing fond and trusting of the brand. I recommend you try these but please get clear info from doctors on severity of your need. The NP suggested I do more research on Iron Bisglycinate and other improved absorption and we will monitor the blood iron levels. FWIW I started this treatment (with one pill) at the same time as Vitamin B12 Cyanocobalamin injections. There was some magic one/two punch with the two treatments that seemed to wipe away years of pain and discomfort. Check you B12, Iron, D and other critical vitamins/minerals. Sometimes the answer is a relative affordable over-the-counter readily available supplement. Read more

I have been using this iron for a couple of years and my iron levels in my bloodwork are perfect. These do not cause me any digestive issues, easy on my stomach. There is no bad taste or aftertaste on these pills Read more

I like it. It’s my second bottle. It helps keep my energy level consistent and no constipation. Read more

These supplements are great. No taste or stomach upset and I felt the effects within a few days. I will continue to use them and have recommended this brand to friends and family. Read more