THORNE - Advanced Iron Complex (formerly Ferrasorb) - Complete Blood Support Formula* - B and C Vitamins for Optimal Absorption - 60 Servings
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4.7 out of 5 stars with 368 ratings
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4.7 out of 5 stars with 806 ratings
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4.7 out of 5 stars with 590 ratings
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4.4 out of 5 stars with 29 reviews
quality: 4 out of 5
value: 4 out of 5
92% would recommend
13 recommendations
5 out of 5 stars
Thumbs up graphic, would recommend
25 August, 2025Verified purchase
Easy to take iron
I love this iron for so many reasons. I switched from a previous iron I loved, and this one is even better. The pills are smaller and capsules, so even though they still have a very strong metallic scent and taste they go down easier. It contains higher amounts with a few extra vitamins compared to my old iron, too. I'm supposed to be taking it twice a day, and I'm having very few side effects from doing so. Hoping to see a big increase in my iron when we test again.
5 out of 5 stars
Thumbs up graphic, would recommend
20 January, 2024Verified purchase
No side effects
Well tolerated without any GI issues. If you can’t tolerate iron supplements then try this one
3 out of 5 stars
Thumbs down graphic, would not recommend
15 July, 2023Verified purchase
Not friendly to the belly
Really tough on my stomach
5 out of 5 stars
Thumbs up graphic, would recommend
1 March, 2023
Good ingredients, great supplement.
When I got this supplement delivered I was unsure what the effects or uses would be for me. The pills are easy to swallow and it felt a difference within a week of using. The ingredients are clean and I felt comfortable using these.
5 out of 5 stars
Thumbs up graphic, would recommend
23 December, 2022
Great Pick Me Up
I was fortunate enough to get to try the Ferrasorb supplement. It was just the pick me up I needed and a great supplement to the red meat I'm consuming. There was no after taste and was easy to swallow. I appreciate that it didn't upset my stomach if I took it on an empty stomach. There was also no odor when I opened the bottle which was great. You never really know if things are going to smell weird and luckily this one did not. I would definitely get this again and recommend it.
5 out of 5 stars
Thumbs up graphic, would recommend
20 December, 2022
Fantastic for Sensitive Stomachs!
This is a fantastic supplement! It’s a fantastic upgrade to a simple iron or ferritin supplement. The capsules are very easy to take. My favorite thing about this supplement is this: I have a very, very sensitive stomach, and most iron supplements wreak havoc on my gastrointestinal tract. I have had absolutely no issues or side effects whatsoever with this supplement. I have been taking it for several weeks and can already start to see positive effects. New hair growth, stronger fingernails, much less tired. Another favorite about this supplement, it has additional vitamins that help with absorption. Now, I don’t have to drink a glass of OJ every time I take my iron supplement! I absolutely recommend this product to any and everyone that needs to take an iron supplement, especially those with sensitive bellies!
3 out of 5 stars
Thumbs up graphic, would recommend
16 December, 2022
Simple Supplement
I took full bottle of 30 supplement pills. Had no side effects, nor any improvement at all in terms of feeling different or better. Thought i would at least have a bit more energy since it helps with B12 increase. I was reading this should help with absorbed iron supplements and people who are anemic. i assume it did the job. I get blood test for physical in January so will see if that had indeed improved.
3 out of 5 stars
15 December, 2022
It could be great if you don’t need to take it more than once a day.
I was really hoping to love Thorne Ferrasorb. After about 4 days of switching from my regular iron supplement to Ferrasorb I really notice a negative difference in my body’s reaction. I tried increasing to 2 capsules twice a day. By doing that I did notice a slight improvement. I could see how spreading out the doses has it benefits for some people. The inconvenience of multiple dose’s throughout the day and added cost just makes this product not worth the switch for me.
4 out of 5 stars
13 December, 2022
Easy way to get certain vitamins/minerals
I always worry if I'm getting enough vitamins/minerals to keep my body healthy. This vitamin offers a combination of Vitamins C, B6, & B12, as well Folate & Iron. From what I've read, these are always the vitamins/minerals that women are most deficient in, so it lends peace of mind when I take the supplement that I'll keep that in check. I like that it's in capsule form. They seem to be easier to swallow.
5 out of 5 stars
Thumbs up graphic, would recommend
11 December, 2022
Awesome!!!
These supplements are the best I have ever found. They work so quickly with replenishing iron for me. I have always had a problem with my iron levels but not so much any longer. I definitely recommend them.
4 out of 5 stars
Thumbs up graphic, would recommend
9 December, 2022
Worth a try
I usually take an iron supplement but thought I would try these instead. These pills are a little larger compared to what I usually take but still able to swallow it easily. I think it’s best to take daily so make sure you do not miss a day.
5 out of 5 stars
Thumbs up graphic, would recommend
7 December, 2022
Superior Choice for an Iron Supplement
This iron pill is small, and easy to swallow. I really like that it also have vitamin C in it to help the iron absorb, and also includes some Vitamin B12 and folate. This could be a great choice for an iron supplement during pregnancy. I have naturally low iron levels and low red blood cell count, so I was excited to see this advertised as "blood building". I have been taking this for a few weeks now, and feel that it helps with my fatigue and light headedness. I'll be happy to update my review once I have bloodwork done and can compare my iron levels to before this supplement.
3 out of 5 stars
6 December, 2022
Fine, not fantastic, supplement
I am borderline anemic so my doctor recommended I use an iron supplement. I have used other brands in the past and have some problems with stomach pain after use. I did have a little bit of that issue with this brand but it did not last long. However, I have felt like I get better results from other brands.
4 out of 5 stars
Thumbs up graphic, would recommend
6 December, 2022
Helpful for that time of the month
Iron pills work well if you have a heavy flow to keep you from getting so tired when you are menstruating. They go down easy and no real side effects that i experienced. Just be careful because you can get sick if you take too much iron!
4 out of 5 stars
Thumbs up graphic, would recommend
6 December, 2022
Pretty good
I think these supplements worked pretty well. I have an iron deficiency and don’t take iron because it makes me too nauseous. This wasn’t bad at all. Didn’t feel sick once while taking them. I did notice if I missed a day that my body felt it. If iron makes you nauseous and you’re looking for something to help other then iron rich foods. This was a good help
4 out of 5 stars
5 December, 2022
Iron supplement
These are iron supplements. I did not get a baseline iron before and after using so I can't say how effective these were as an intervention. I typically take an iron supplement so these seem to be just as effective as any other brand.
5 out of 5 stars
Thumbs up graphic, would recommend
30 November, 2022
Excellent.
This iron supplement that I had tried was super easy on my stomach and it didn’t cause any distress.And it is a great combination for iron absorption and the capsules are small and they are easy to take.