5/17/2025
Last update
5/17/2025
Reviewed By
Overview
SCIENTIFIC SCORE
Moderately Effective
Based on 4 Researches
8
USERS' SCORE
Medium or Average
Based on 4 Reviews
6.7
Top Medical Research Studies
9
We evaluated how switching to ferric citrate hydrate (FCH) impacts nausea in women with iron deficiency anemia (IDA) who struggled with oral iron. In a multicenter study of 30 patients, those on FCH experienced significant improvements. Nausea scores dropped from 5.7 to 1.7, and the overall incidence of nausea decreased notably. Also, 80% reported better experiences compared to previous treatments.
Overall, our findings suggest that FCH not only enhances medication adherence but also effectively reduces nausea and improves quality of life in these patients.
Overall, our findings suggest that FCH not only enhances medication adherence but also effectively reduces nausea and improves quality of life in these patients.
Read More
9
We conducted a study to examine the effectiveness of a specific iron supplement, emulsified microsomal ferric pyrophosphate (EMFP), in treating iron deficiency anemia among pregnant women. Our focus was not only on improving hemoglobin levels but also on alleviating related symptoms, including nausea.
Within 30 days of starting treatment with EMFP, we observed significant increases in hemoglobin levels, alongside marked improvements in serum ferritin and iron levels. As nausea is a common complaint among pregnant women, we noted a decrease in various symptoms, including nausea, breathlessness, and dizziness, which contributed to a better quality of life for the participants.
Notably, treatment compliance was remarkably high at 99.5%, indicating that the participants were committed to managing their anemia effectively. Importantly, we did not encounter any severe side effects related to the treatment, suggesting a favorable safety profile.
Overall, our findings support the idea that iron treatment can help alleviate nausea and other discomforts related to iron deficiency anemia in pregnancy, positively impacting both mother and baby.
Within 30 days of starting treatment with EMFP, we observed significant increases in hemoglobin levels, alongside marked improvements in serum ferritin and iron levels. As nausea is a common complaint among pregnant women, we noted a decrease in various symptoms, including nausea, breathlessness, and dizziness, which contributed to a better quality of life for the participants.
Notably, treatment compliance was remarkably high at 99.5%, indicating that the participants were committed to managing their anemia effectively. Importantly, we did not encounter any severe side effects related to the treatment, suggesting a favorable safety profile.
Overall, our findings support the idea that iron treatment can help alleviate nausea and other discomforts related to iron deficiency anemia in pregnancy, positively impacting both mother and baby.
Read More
7
We explored the effects of daily versus three times weekly (TIW) oral iron supplementation on nausea in NCAA Division 1 female athletes. The study involved 33 athletes who were either in track and field or soccer. Participants were given either daily doses or TIW doses of ferrous bisglycinate over eight weeks.
Both groups showed an increase in serum ferritin levels, which is a marker of iron stores. However, the TIW regimen resulted in a smaller increase of about 5.17 μg/L, compared to an increase of 12.88 μg/L with the daily regimen. Notably, those taking daily supplements experienced significantly more nausea and constipation than those on the TIW schedule.
While the daily regimen may boost iron levels more effectively, it can come at the cost of increased gastrointestinal discomfort. Meanwhile, the TIW regimen offers a gentler option with fewer side effects, positioning it as a viable alternative for athletes concerned about nausea.
Both groups showed an increase in serum ferritin levels, which is a marker of iron stores. However, the TIW regimen resulted in a smaller increase of about 5.17 μg/L, compared to an increase of 12.88 μg/L with the daily regimen. Notably, those taking daily supplements experienced significantly more nausea and constipation than those on the TIW schedule.
While the daily regimen may boost iron levels more effectively, it can come at the cost of increased gastrointestinal discomfort. Meanwhile, the TIW regimen offers a gentler option with fewer side effects, positioning it as a viable alternative for athletes concerned about nausea.
Read More
Most Useful Reviews
0
No nausea experienced
68 people found this helpful
I use Slow Fe for multiple reasons: it's easy on my sensitive stomach, and over two months, I have experienced no abdominal pain or nausea. The slow-release formula allows for a larger daily dose without the discomfort associated with faster-acting brands. The value is also impressive due to bulk availability, and I trust the brand because of its long-standing reliability. After two months, I've noticed improvements in energy, skin colour, and overall well-being. While I do see some side effects typical of iron supplementation, such as darker feces, I still find it effective and worthwhile.
Read More
10
Minimal negative reactions
3 people found this helpful
As someone who occasionally needs iron for deficiency anaemia, I've tried many tablets that caused nausea and upset stomach. This is now my favourite go-to! I take it at night with some orange juice, and thankfully, I have not experienced any stomach issues. It's an excellent product at a good price.
Read More
10
Zero stomach issues
1 people found this helpful
This supplement was recommended by friends after I was diagnosed with iron deficiency anaemia. I have a very sensitive stomach, and traditional iron supplements caused numerous issues. After trying this for about a month, I am pleased to report it has caused no stomach problems at all—no nausea, no constipation, and no discomfort. I'm very happy with this and will keep using it instead of conventional iron supplements.
Read More
Medical Researches
SCIENTIFIC SCORE
Moderately Effective
Based on 4 Researches
8
- All Researches
9
We conducted a study to examine the effectiveness of a specific iron supplement, emulsified microsomal ferric pyrophosphate (EMFP), in treating iron deficiency anemia among pregnant women. Our focus was not only on improving hemoglobin levels but also on alleviating related symptoms, including nausea.
Within 30 days of starting treatment with EMFP, we observed significant increases in hemoglobin levels, alongside marked improvements in serum ferritin and iron levels. As nausea is a common complaint among pregnant women, we noted a decrease in various symptoms, including nausea, breathlessness, and dizziness, which contributed to a better quality of life for the participants.
Notably, treatment compliance was remarkably high at 99.5%, indicating that the participants were committed to managing their anemia effectively. Importantly, we did not encounter any severe side effects related to the treatment, suggesting a favorable safety profile.
Overall, our findings support the idea that iron treatment can help alleviate nausea and other discomforts related to iron deficiency anemia in pregnancy, positively impacting both mother and baby.
Within 30 days of starting treatment with EMFP, we observed significant increases in hemoglobin levels, alongside marked improvements in serum ferritin and iron levels. As nausea is a common complaint among pregnant women, we noted a decrease in various symptoms, including nausea, breathlessness, and dizziness, which contributed to a better quality of life for the participants.
Notably, treatment compliance was remarkably high at 99.5%, indicating that the participants were committed to managing their anemia effectively. Importantly, we did not encounter any severe side effects related to the treatment, suggesting a favorable safety profile.
Overall, our findings support the idea that iron treatment can help alleviate nausea and other discomforts related to iron deficiency anemia in pregnancy, positively impacting both mother and baby.
Read More
9
We evaluated how switching to ferric citrate hydrate (FCH) impacts nausea in women with iron deficiency anemia (IDA) who struggled with oral iron. In a multicenter study of 30 patients, those on FCH experienced significant improvements. Nausea scores dropped from 5.7 to 1.7, and the overall incidence of nausea decreased notably. Also, 80% reported better experiences compared to previous treatments.
Overall, our findings suggest that FCH not only enhances medication adherence but also effectively reduces nausea and improves quality of life in these patients.
Overall, our findings suggest that FCH not only enhances medication adherence but also effectively reduces nausea and improves quality of life in these patients.
Read More
7
We explored the effects of daily versus three times weekly (TIW) oral iron supplementation on nausea in NCAA Division 1 female athletes. The study involved 33 athletes who were either in track and field or soccer. Participants were given either daily doses or TIW doses of ferrous bisglycinate over eight weeks.
Both groups showed an increase in serum ferritin levels, which is a marker of iron stores. However, the TIW regimen resulted in a smaller increase of about 5.17 μg/L, compared to an increase of 12.88 μg/L with the daily regimen. Notably, those taking daily supplements experienced significantly more nausea and constipation than those on the TIW schedule.
While the daily regimen may boost iron levels more effectively, it can come at the cost of increased gastrointestinal discomfort. Meanwhile, the TIW regimen offers a gentler option with fewer side effects, positioning it as a viable alternative for athletes concerned about nausea.
Both groups showed an increase in serum ferritin levels, which is a marker of iron stores. However, the TIW regimen resulted in a smaller increase of about 5.17 μg/L, compared to an increase of 12.88 μg/L with the daily regimen. Notably, those taking daily supplements experienced significantly more nausea and constipation than those on the TIW schedule.
While the daily regimen may boost iron levels more effectively, it can come at the cost of increased gastrointestinal discomfort. Meanwhile, the TIW regimen offers a gentler option with fewer side effects, positioning it as a viable alternative for athletes concerned about nausea.
Read More
7
Ferric carboxymaltose reduces nausea
This randomized controlled trial explored how low-dose ferric carboxymaltose (FCM) affects hemoglobin levels and nausea in postpartum East Asian women. Participants received either an intravenous FCM infusion or oral iron for four weeks.
We found that while FCM significantly increased hemoglobin levels after two weeks, both treatments showed no significant difference in final hemoglobin results after four weeks.
Notably, the FCM group experienced fewer gastrointestinal side effects, including nausea, suggesting it may be a more comfortable option for new mothers.
We found that while FCM significantly increased hemoglobin levels after two weeks, both treatments showed no significant difference in final hemoglobin results after four weeks.
Notably, the FCM group experienced fewer gastrointestinal side effects, including nausea, suggesting it may be a more comfortable option for new mothers.
Read More
User Reviews
USERS' SCORE
Medium or Average
Based on 4 Reviews
6.7
- All Reviews
- Positive Reviews
- Negative Reviews
0
No nausea experienced
68 people found this helpful
I use Slow Fe for multiple reasons: it's easy on my sensitive stomach, and over two months, I have experienced no abdominal pain or nausea. The slow-release formula allows for a larger daily dose without the discomfort associated with faster-acting brands. The value is also impressive due to bulk availability, and I trust the brand because of its long-standing reliability. After two months, I've noticed improvements in energy, skin colour, and overall well-being. While I do see some side effects typical of iron supplementation, such as darker feces, I still find it effective and worthwhile.
Read More
10
Minimal negative reactions
3 people found this helpful
As someone who occasionally needs iron for deficiency anaemia, I've tried many tablets that caused nausea and upset stomach. This is now my favourite go-to! I take it at night with some orange juice, and thankfully, I have not experienced any stomach issues. It's an excellent product at a good price.
Read More
10
Zero stomach issues
1 people found this helpful
This supplement was recommended by friends after I was diagnosed with iron deficiency anaemia. I have a very sensitive stomach, and traditional iron supplements caused numerous issues. After trying this for about a month, I am pleased to report it has caused no stomach problems at all—no nausea, no constipation, and no discomfort. I'm very happy with this and will keep using it instead of conventional iron supplements.
Read More
10
Soft on stomach
1 people found this helpful
Works great and is gentle on the stomach. No nausea experienced, and it’s priced similarly to Walmart's offerings.
Read More
Frequently Asked Questions
No FAQs are available for this product and symptom.
References
- Srivastav A, Kshirsagar S, Adhav T, Ganu G, Shah A. Efficacy and Safety of Microsomal Ferric Pyrophosphate Supplement for Iron Deficiency Anemia in Pregnancy. Cureus. 2024;16:e57108. 10.7759/cureus.57108
- Schulte J, Peterson K, Thomsen T, Lentz S, Hall M, et al. Daily versus three times weekly dosing for treatment of iron deficiency nonanemia in NCAA Division 1 female athletes. PM R. 2024;16:316. 10.1002/pmrj.13172
- Nagao T, Takahashi K, Takahashi S, Yokomizo R, Samura O, et al. Low-dose ferric carboxymaltose vs. oral iron for improving hemoglobin levels in postpartum East Asian women: A randomized controlled trial. PLoS One. 2025;20:e0319795. 10.1371/journal.pone.0319795
- Wada-Hiraike O, Maruyama A, Mitobe Y, Iriyama T, Mori-Uchino M, et al. A Multicenter Single-Arm Study of Switching to Ferric Citrate Hydrate for Iron Deficiency Anemia in Patients Intolerant to Oral Iron: RIO-SWITCH. Adv Ther. 2025. 10.1007/s12325-025-03123-9
