Along with a certified nutrition coach, we tested and selected the five best iron supplements of 2026. Some are paired with B vitamins or vitamin C for added benefits. For the busy professional trying to evaluate the myriad choices for an iron supplement in today’s market, we can help provide the info you need to make a smart choice. 

Best Iron Supplements of 2026

• Best Iron Supplement Overall: Ritual Iron
• Best Iron Supplement for Pregnancy: Perelel Daily Iron Ease
• Best Iron Supplement for Anemia: Nutricost Iron for Women
• Best Iron Supplement for Sensitive Stomachs: Needed Prenatal Iron
• Best Iron Supplement for Absorption: Thorne Iron Bisglycinate

Best Iron Supplements Comparison Table

Iron Supplements	Iron Per Serving	Serving Size	Third-Party Testing	Additional Ingredients
Ritual Iron	60 mg	1 vegan capsule	Yes	Vitamin A, vitamin C
Perelel Daily Iron Ease	15 mg	1 capsule	Yes	Vitamin C, vitamin B12, magnesium
Nutricost Iron for Women	65 mg	1 capsule	Yes	Vitamin B12, vitamin C, folate
Needed Prenatal Iron	13.5 mg	1 capsule	Yes	None
Thorne Iron Bisglycinate	25 mg	1 capsule	Yes	none

Ritual Iron
Iron Per Serving	60 mg
Serving Size	1 vegan capsule
Third-Party Testing	Yes
Additional Ingredients	Vitamin A, vitamin C
Perelel Daily Iron Ease
Iron Per Serving	15 mg
Serving Size	1 capsule
Third-Party Testing	Yes
Additional Ingredients	Vitamin C, vitamin B12, magnesium
Nutricost Iron for Women
Iron Per Serving	65 mg
Serving Size	1 capsule
Third-Party Testing	Yes
Additional Ingredients	Vitamin B12, vitamin C, folate
Needed Prenatal Iron
Iron Per Serving	13.5 mg
Serving Size	1 capsule
Third-Party Testing	Yes
Additional Ingredients	None
Thorne Iron Bisglycinate
Iron Per Serving	25 mg
Serving Size	1 capsule
Third-Party Testing	Yes
Additional Ingredients	none

Best Iron Supplement Overall: Ritual Iron

Our Thoughts on Ritual Iron

Ritual Iron is our pick for the best overall iron supplement because it is specially designed to be taken every other day, and includes three time release tablets within each capsule. The iron source is ferrous bisglycinate, which is known for improved absorption and tolerability than other forms of iron. The time release capsule helps to minimize possible gastrointestinal side effects, too.

Pete tested Ritual’s Iron supplement and rated his first impressions of the product as a 5 out of 5. The supplement comes in a clear plastic bottle with a child-proof locking lid. “The bottle is aesthetically pleasing because you can see the capsules inside, and the capsules look pretty cool–they’re clear and have three small balls inside,” he said. “The supplement container is very small, it only contains 15 servings. It would definitely be travel-friendly.”

He found the instructions easy to read and follow. It says to take one capsule every other day in the morning, without food. Pete rated these instructions as a 5 out of 5, though he could see people having trouble with the idea of taking this every other day. “People could forget if they’ve taken the supplement the day before or not, which could cause some issues with long-term, consistent use,” Pete noted.

When it comes to pill form and size, Pete rated his experience a 5 out of 5. The supplement comes in clear capsules, and our tester found the design interesting. “The capsule contains three small ball-shaped tablets, ranging in color from dark gray to light gray. Ritual says this design is intended to promote iron absorption,” Pete noted. The first tablet is instantly released, the second tablet is intermediate release, and the third tablet is slow release. “The idea is that this will help ease any digestive discomfort that’s often common with iron supplements,” Pete said. The recommended serving size is one capsule every other day.

Pete found the capsules to be tasteless, and he didn’t notice any digestive side effects. Overall, he’s a fan of this supplement. “This is a form of iron that’s known for solid absorption and better stomach tolerance than many standard iron salts,” he said. “This product is best suited for individuals looking to actively correct or prevent low iron levels rather than just cover basic daily needs. Overall, it’s a high-quality and targeted option for users who want an iron supplement that prioritizes bioavailability and tolerability,” Pete concluded.

Best Iron Supplement for Pregnancy: Perelel Daily Iron Ease

Perelel Daily Iron Ease is our pick for the best iron supplement during pregnancy because it’s  designed to be paired with Perelel’s vitamin packs for all stages of pregnancy, including preconception and postpartum. We recommend talking with your doctor before taking any pregnancy supplements. This iron supplement also includes vitamin C, vitamin B12, and magnesium for additional support.

Pete tested Perelel’s Daily Iron Ease, rating his first impressions a 5 out of 5. “It comes in a white plastic container with a screw top lid that opens and closes easily,” he said. “The size of the container is fairly small, fits in the palm of my hand, and is travel friendly.” Pete found the design to be simple and the bottle is all white with black text, which is easy to read.

He rated swallowability as a 3 out of 5. The supplement comes in a clear capsule with a light brown powder inside. “The pill is average in size, about 1-inch in length and 1-centimeter in diameter,” Pete said. The serving size is one capsule per day.

The capsule was tasteless, and Pete did not experience any digestive side effects while testing. Overall, Pete noted that this supplement is marketed towards pregnant and breastfeeding women—it’s generally safe for both. He likes that this supplement includes Ferrochel (Ferrous Bisglycinate Chelate), which is designed to treat iron deficiency without causing common digestive side effects like nausea, constipation, and diarrhea.If you’re interested in other supplements to take while pregnant, check out our list of the best prenatal vitamins.

Best Iron Supplement for Anemia: Nutricost Iron for Women

Our Thoughts on Nutricost Iron for Women

Nutricost Iron for Women is our pick for the best iron supplement for anemia because it includes 65 milligrams of iron, the highest on our list. It’s also incredibly affordable, as each serving costs $0.11 cents, and a bottle will last for 180 servings, or around six months. We recommend talking with your doctor before starting this (or any) iron supplement for anemia. While anyone can take this supplement, women are more likely than men to have anemia, so we zeroed in on that factor for this pick.

Pete tested Nutricost’s Iron for Women, rating his first impression of the product a 5 out of 5. The supplement comes in a white plastic container with a screw top lid that opens and closes easily, per Pete. “The container is about the size of my hand, but it does contain a 6-month supply, 180 servings. The bottle is small enough to fit in a backpack or a small purse, so it’s definitely travel friendly.” Pete also noted that the label looks great and is easy to read.

He found this supplement’s instructions easy to read and follow, rating them a 5 out of 5. For swallowability, he gave it a 3 out of 5. “The powder inside the clear capsule is a light brown color, and the recommended serving size is one capsule per day,” Pete said. He noted that the capsule is a standard size, about 1-inch in length and 1-centimeter in diameter.

The capsule was tasteless, and Pete didn’t experience any digestive side effects after testing this iron supplement. “This is a top budget-friendly iron supplement,” Pete said, noting that as of testing, the price per serving amounted to just 11 cents. “Each serving (1 capsule) contains 45 mg of vitamin C, 200 mcg of folate, 400 mcg vitamin B12, and 65 mg of iron from ferrous bisglycinate and ferrous fumarate.”

This is considered a high-dose iron supplement. For perspective, the recommended daily intake for adult women ages 19–50 is about 18 milligrams per day, and for adult men it’s 8 milligrams per day, Pete said. A 65-milligram dose is well above baseline daily needs and is typically more in line with amounts used to help correct an existing iron deficiency, rather than simply maintain normal levels. We recommend talking with your doctor about your iron needs, doing bloodwork, and starting at a dose deemed appropriate by a clinician to ensure safety.

Best Iron Supplement for Sensitive Stomachs: Needed Prenatal Iron

Needed Prenatal Iron is our pick for the best iron supplement for sensitive stomachs because it’s formulated with chelated iron (Ferrochel) at a low dose that can be adjusted up or down to meet your iron needs. Needed chose Ferrochel because it is associated with better absorption, which in turn, helps decrease side effects like constipation or nausea.

Paige tested the Needed Prenatal Iron, rating her first impression of the supplement as a 3 out of 5, largely because the childproof packaging can be a little difficult to close. “That said, I really like the aesthetics of the packing,” she said. “It is very clean and the font is neat.” 

Paige found some of the directions unclear, giving this supplement a rating of 3 out 5. “Instructions say to take 1 serving up to four times daily ideally on an empty stomach,” she said. “I was surprised that you could take this pill up to 4 times a day. The instructions were in a small font and were kind of hidden among the other text. I would appreciate it if the heading was more bold.”

During testing, Paige noted the pills were small and easy to swallow, and gave it a rating of 5 out of 5 for swallowability. 

“The pill did not have any after taste or chalkiness,” she said. “The capsule was smooth and I was able to swallow it with ease. Because of this, she gave it a rating of 5 out 5 for taste.

If you’re interested in exploring some other supplemental options for a sensitive stomach, check out our lists of the best probiotics and best best prebiotics.

Best Iron Supplement for Absorption: Thorne Iron Bisglycinate

Our Thoughts on Thorne Iron Bisglycinate 

Thorne Iron Bisglycinate is our pick for the best iron supplement for absorption because iron bisglycinate is better absorbed than ferrous sulfate. This formulation is simple, including only iron, and 25 milligrams per capsule. That’s 139% of your daily recommended value, so this iron supplement will be enough for most folks. 

Pete tested Thorne’s Iron Bisglycinate, rating his first impressions a 5 out of 5. “The supplement comes in a white plastic container with a child-proof locking lid. The bottle is relatively small and I’d consider it travel-friendly. The label looks high-quality, and the front is large enough so that it’s easy to read,” he said.

“This supplement comes in a clear capsule, and the powder inside is light brown with gray specks. The capsule is smaller than average, only a little over ½-inch in length and about ½-centimeter in diameter. The recommended serving size is one capsule a day,” he said. Pete rated the swallowability as a 3 out of 5 for this iron supplement.

He said the capsule was tasteless, and he didn’t experience any negative or digestive side effects after taking this supplement. “This product would be beneficial for anyone with a diagnosed iron deficiency. Iron Bisglycinate is a well-absorbed form of iron that reduces gastrointestinal side effects, something that’s fairly common with conventional iron supplements like ferrous sulfate. This product is also NSF Certified for Sport, meaning it’s safe for competitive athletes who participate in drug tested competition,” Pete said.

How We Tested and Selected the Best Iron Supplements

We tested and chose the best iron supplements for you by considering formulations, taste, swallowability, third-party testing, value, and more. You can learn more about our testing below, or see our supplements testing methodology.

Formula

We work with a registered dietitian during testing to find the most effective and safest iron formulations. The recommended daily value for adults is 8 milligrams per day, with higher amounts for females. 

Taste and Swallowability

When testing iron supplements, we consider the taste of the capsules (if any). Our testers also report on ease of swallowing the supplements, number of pills to swallow, and other details such as any bitterness or odd tastes.

Third-Party Testing

Our team places a strong emphasis on products that undergo third‑party testing. This typically means an independent lab has verified that what’s on the label matches what’s in the container and has checked for certain contaminants.

That extra oversight matters because dietary supplements are not regulated by the FDA in the same way as drugs or many conventional foods, so quality can vary widely from brand to brand. When possible, we favor options that clearly disclose reputable third‑party certifications.

Value

For value, we weigh all of these factors—formula quality, dose, swallowability, and third-party testing—against the cost per serving rather than just looking for the cheapest option. A product that’s a bit more expensive but offers a stronger formula, better taste, and robust quality testing may earn a higher spot than a budget pick that cuts corners.

How to Find the Best Iron Supplements for You

Finding the best iron supplement comes down to matching the product to your body, lifestyle, and budget while making sure it is safe and evidence‑based.

Your Body’s Needs

Before trying an iron supplement, we recommend talking with your doctor about your concerns. It’s best to have some bloodwork done so you can truly determine the best dose of iron supplementation to take, if needed, and consider ways to get more iron through what you eat, too. If you suspect you may have anemia, talk with your doctor as soon as possible.

Formula

It’s best to review the formula of an iron supplement before purchasing it. Iron supplements often include other vitamins or minerals to help increase absorption, reduce GI side effects, and more. 

Cost

Supplements can be pricey, though we found some great affordable iron supplements and added them to our list. Keep in mind that cleaner supplements that are third-party tested may cost a little more, though we think the cost is worth it for safety and efficacy. There are also more supplemental options (including some that contain iron) on our best multivitamins page.

Third-Party Testing

Look for supplements that are third‑party tested, so you know they contain what the label claims and are screened for common contaminants. Independent testing is especially important for athletes, because it lowers the risk of inadvertent exposure to banned substances.

Benefits of Iron Supplements

Here are some benefits of taking an iron supplement.

• Can help to treat anemia or an iron deficiency
• Improve energy and reduce fatigue
• Support cognitive function
• Support healthy pregnancy outcomes

How to Take Iron Supplements

When taking an iron supplement, we recommend following the manufacturer’s instructions on the label as directed. It’s also good to discuss taking a new iron supplement with your doctor ahead of starting, in case they’d recommend a different starting dose or brand.

“I recommend taking an iron supplement with vitamin C to increase absorption,” says our medical reviewer, Jillian Robillard, MS, RD, LDN, CSSD. “Also, do not take your iron supplement with dairy, tea, coffee, or antacids, as that will inhibit absorption.”

What to Avoid in Iron Supplements

Some ingredients or manufacturing practices can make an iron supplement less ideal for everyday use. Here’s what to avoid when shopping for an iron supplement:

• Proprietary blends that aren’t clear about how much iron is in each serving
• High amounts of vitamin C, which could increase GI upset
• Formulas made with high‑dose ferrous sulfate or ferrous fumarate, which can cause significant GI effects

Frequently asked questions

What is the most effective iron supplement?

Ritual Iron is our pick for the best overall iron supplement because it is specially designed to be taken every other day, and includes three time release tablets within each capsule. The iron source is ferrous bisglycinate, which is known for improved absorption and tolerability than other forms of iron. The time release capsule helps to minimize possible gastrointestinal side effects, too.

How do I boost my iron levels quickly?

Two common ways people can typically boost their iron levels include starting a new iron supplement or eating iron-rich foods, such as lean red meat, poultry, or seafood. Levels can improve within weeks, but for those replenishing deficiency, it can take 3-6 months depending on the person.

Are iron supplements safe?

Iron supplements are generally safe for healthy adults, though we recommend talking with your doctor about taking an iron supplement to determine proper dosage and blood work ahead of starting anything new. It’s also worth mentioning that people who have hemochromatosis are instructed to avoid iron supplements as the condition causes iron buildup in their bodies.