· By Amy Suzanne Upchurch, Founder + CEO of Pink Stork, Certified Health Coach, INHC
Why does gentle iron matter in a prenatal vitamin?
Gentle iron, usually listed as iron bisglycinate or "Ferrochel" on a label, is a chelated form of iron that research shows causes fewer digestive side effects than standard ferrous sulfate, without giving up absorption.† Iron needs increase substantially during pregnancy, so most women cannot skip it, but the traditional form is a common reason women stop taking their prenatal altogether. Choosing a chelated form is one practical way to stay consistent.
Always consult your healthcare provider before starting any new supplement, especially during pregnancy, breastfeeding, or while managing a medical condition.
Why iron needs go up so much during pregnancy
Your blood volume expands substantially during pregnancy to support the placenta and a growing baby, and iron is a core building block of the hemoglobin that carries oxygen through that expanded volume. According to the National Institutes of Health Office of Dietary Supplements, the recommended daily iron intake nearly doubles during pregnancy, and the American College of Obstetricians and Gynecologists recommends low-dose iron supplementation starting in the first trimester specifically to reduce the rate of maternal anemia at delivery.
Most pregnant women in the United States do not get enough iron from diet alone, which is part of why it is one of the few nutrients nearly every prenatal formula includes at a meaningful dose.
Why "gentle" is not just marketing language
Standard ferrous sulfate is inexpensive and well absorbed, but it is also the iron form most associated with nausea, constipation, and stomach pain, side effects that lead a meaningful share of pregnant women to stop taking it. A randomized, double-blind study of pregnant women published in the Journal of Pregnancy compared ferrous bisglycinate, ferrous fumarate, and ferrous sulphate at equivalent iron doses and found that the bisglycinate group had the lowest overall rate of combined gastrointestinal complaints.
Iron bisglycinate (Ferrochel) works by binding iron to two glycine molecules, which changes how it moves through the digestive tract. This chelated structure is intended to be gentler on digestion than ferrous sulfate.† Total Prenatal uses iron bisglycinate chelate for this reason, formulated to support healthy iron status during pregnancy without the harsher digestive load of older iron forms.†
You can see the full formulation in our clean-label prenatal with 5-MTHF and iron bisglycinate.
What to check on your current prenatal label
- Look for "iron bisglycinate," "ferrous bisglycinate," or "Ferrochel" rather than "ferrous sulfate" or "ferrous fumarate"
- Note the elemental iron amount in milligrams, not just the total compound weight
- If you are already experiencing nausea or constipation on your current prenatal, this is worth raising with your provider before assuming you have to push through it
"My journey has been one of faith, resilience, and determination, and a lot of that came from learning to listen to my body during pregnancy instead of pushing through discomfort. If something in your routine is making you feel worse, it is worth changing, not white-knuckling."
— Amy Suzanne Upchurch, Founder and CEO of Pink Stork
If you are switching prenatals mid-pregnancy
Many women switch prenatals specifically because of iron-related stomach upset. Alongside the iron change, Total Prenatal, designed for preconception through breastfeeding, also includes algae-sourced DHA, so a separate DHA supplement is not needed.† For women transitioning out of a postpartum multivitamin, our postnatal multivitamin with vegan algae DHA, no fishy burps, uses a comparable approach to iron tolerability for the fourth trimester.
Trust signals worth knowing
- Total Prenatal is third-party tested at ISO 17025 accredited labs and manufactured in cGMP-certified facilities
- Pink Stork has more than 50,000 verified Amazon reviews across the brand
Related reading
Frequently asked questions
Does gentle iron work as well as ferrous sulfate?
Research on iron bisglycinate shows it is well absorbed and produces fewer gastrointestinal complaints compared to ferrous sulfate at equivalent doses in pregnant women. Talk with your provider about which form and dose is right for your iron status.
Can gentle iron still cause constipation?
Constipation is possible with any iron supplement, but the chelated structure of iron bisglycinate is associated with a lower rate of it compared to standard iron salts.
How much iron do I actually need during pregnancy?
Iron needs increase meaningfully during pregnancy. Your exact target depends on your iron status and history, so this is a conversation for your prenatal appointment rather than a number to self-select.
Is Total Prenatal's iron gentle enough for a sensitive stomach?
Total Prenatal uses iron bisglycinate chelate, formulated as a gentler alternative to ferrous sulfate.† Individual tolerance still varies, so continue to monitor how you feel and loop in your provider if symptoms persist.
Should I take iron on an empty stomach or with food?
This depends on the iron form and your personal tolerance. Ask your healthcare provider or pharmacist for guidance specific to your prenatal.
Can I switch to a gentle iron prenatal partway through pregnancy?
Many women do. Talk with your healthcare provider before switching any supplement during pregnancy.
† These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Always consult your healthcare provider before starting any new supplement, especially during pregnancy, breastfeeding, or while managing a medical condition. Keep out of reach of children.
