We Use CookiesWe use cookies to enhance the security, performance,
functionality and for analytical and promotional activities. By continuing to browse this site you
are agreeing to our privacy policy
10 Best Iron Supplements 2025 in the United States
#1
Winner
Doctor's Recipes Iron Supplement 65 mg with Vitamin C - Maximized Absorption, Stomach Friendly & High Potency Iron Pills for Red Blood Cells Formation & Immunity Health - Vegan Non-GMO 60 Iron Tablets
Doctor's Recipes Iron Supplement offers a high-potency dose of 65 mg of elemental carbonyl iron per tablet, which is known for its gentle absorption and fewer digestive side effects compared to ferrous salts. The inclusion of 250 mg of Vitamin C significantly aids in iron absorption, making it more effective. This supplement is also vegan, non-GMO, and free from soy, gluten, and dairy, catering to various dietary restrictions. Additionally, it is made in a GMP-certified facility in the USA, ensuring high-quality standards and third-party testing for purity and efficacy.
Customer Highlights
A summary of real customer reviews to highlight what shoppers are saying!Customer Highlights
A summary of real customer reviews to highlight what shoppers are saying!#2
THORNE Ferrasorb - 36 mg Iron with Essential Nutrients - Complete Blood Support Formula - Elemental Iron, Folate, B and C Vitamins for Optimal Absorption - Gluten-Free - 60 Capsules
THORNE Ferrasorb offers a comprehensive iron supplement that seems well-suited for adults experiencing iron deficiencies. It provides 36 mg of elemental iron in each capsule using iron bisglycinate, a form known for being well-absorbed and less likely to cause constipation compared to other iron types. The inclusion of vitamin C, vitamin B6, vitamin B12, and folate enhances iron absorption and supports blood health, making it particularly effective for those dealing with symptoms like fatigue or dizziness due to iron deficiency.
Customer Highlights
A summary of real customer reviews to highlight what shoppers are saying!Customer Highlights
A summary of real customer reviews to highlight what shoppers are saying!#3
MegaFood Blood Builder - Iron Supplement Clinically Shown to Increase Iron Levels without Side Effects - Iron Supplement for Women with Vitamin C, Vitamin B12 and Folic Acid - Vegan - 60 Tabs
The MegaFood Blood Builder is a vegan iron supplement designed to increase iron levels without causing side effects, which makes it a gentle option for those who may experience digestive issues with other iron supplements. It contains 60 tablets, each enriched with additional nutrients such as vitamin C, vitamin B12, and folic acid. These added vitamins help support healthy red blood cell production and improve the absorption rate of iron in the body. The inclusion of beet root is another bonus, contributing to overall health benefits.
Customer Highlights
A summary of real customer reviews to highlight what shoppers are saying!Customer Highlights
A summary of real customer reviews to highlight what shoppers are saying!Top 10 Best Iron Supplements 2025 in the United States
#1
Winner
9.8 score
Doctor's Recipes Iron Supplement 65 mg with Vitamin C - Maximized Absorption, Stomach Friendly & High Potency Iron Pills for Red Blood Cells Formation & Immunity Health - Vegan Non-GMO 60 Iron Tablets
Doctor's Recipes Iron Supplement 65 mg with Vitamin C - Maximized Absorption, Stomach Friendly & High Potency Iron Pills for Red Blood Cells Formation & Immunity Health - Vegan Non-GMO 60 Iron Tablets
Type of Iron: Elemental carbonyl iron
Dosage: 65 mg per tablet
Form: Tablet
Additional Nutrients: 250 mg of Vitamin C
Side Effects: Fewer digestive side effects
Absorption Rate: Gentle absorption
Chosen by 1235 this week
THORNE Ferrasorb - 36 mg Iron with Essential Nutrients - Complete Blood Support Formula - Elemental Iron, Folate, B and C Vitamins for Optimal Absorption - Gluten-Free - 60 Capsules
THORNE Ferrasorb - 36 mg Iron with Essential Nutrients - Complete Blood Support Formula - Elemental Iron, Folate, B and C Vitamins for Optimal Absorption - Gluten-Free - 60 Capsules
Type of Iron: iron bisglycinate
Dosage: 36 mg
Form: Capsule
Additional Nutrients: vitamin C, B6, B12, folate
Side Effects: gastrointestinal discomfort
MegaFood Blood Builder - Iron Supplement Clinically Shown to Increase Iron Levels without Side Effects - Iron Supplement for Women with Vitamin C, Vitamin B12 and Folic Acid - Vegan - 60 Tabs
MegaFood Blood Builder - Iron Supplement Clinically Shown to Increase Iron Levels without Side Effects - Iron Supplement for Women with Vitamin C, Vitamin B12 and Folic Acid - Vegan - 60 Tabs
Type of Iron: Vegan iron
Form: Tablet
Additional Nutrients: Vitamin C, B12, Folic Acid, Beet Root
Absorption Rate: Improved
Slow Fe 45mg Iron Supplement for Iron Deficiency, Slow Release, High Potency, Easy to Swallow Tablets - 60 Count
Slow Fe 45mg Iron Supplement for Iron Deficiency, Slow Release, High Potency, Easy to Swallow Tablets - 60 Count
Type of Iron: 45mg Iron Supplement
Dosage: 45mg
Form: Tablet
Side Effects: digestive discomfort, constipation
Absorption Rate: slow-release
MegaFood Blood Builder Minis - Iron Supplement Clinically Shown to Increase Iron Levels Without Side Effects - Iron with Vitamin C, Vitamin B12 & Folic Acid - Vegan - 72 Tablets (36 Servings)
MegaFood Blood Builder Minis - Iron Supplement Clinically Shown to Increase Iron Levels Without Side Effects - Iron with Vitamin C, Vitamin B12 & Folic Acid - Vegan - 72 Tablets (36 Servings)
Type of Iron: Iron
Dosage: 26 mg
Form: Tablet
Additional Nutrients: Vitamin C, B12, folic acid
Side Effects: constipation
Related Products
Up to 18% off
Vitron-C Iron Supplement, Immunity Support Iron Supplements with Vitamin C, Iron Pills for Immune Support, 60 Count
Vitron-C Iron Supplement, Immunity Support Iron Supplements with Vitamin C, Iron Pills for Immune Support, 60 Count
Type of Iron: Carbonyl iron
Dosage: 65 mg per tablet
Form: Tablet
Additional Nutrients: 125 mg Vitamin C
Side Effects: Less constipation
Nature's Bounty Iron 65mg, 325 mg Ferrous Sulfate, Cellular Energy Support, Promotes Normal Red Blood Cell Production, 100 Tablets
Nature's Bounty Iron 65mg, 325 mg Ferrous Sulfate, Cellular Energy Support, Promotes Normal Red Blood Cell Production, 100 Tablets
Type of Iron: Ferrous Sulfate
Dosage: 65mg
Form: Tablets
Side Effects: stomach upset, constipation
Absorption Rate: good
Feosol Complete Iron Supplement Caplets, Bifera Iron for High Absorption, Heme and Non-Heme Dual Action Minimizes Side Effects, 1 Per Day, for Energy and Immune System Support, Made in USA, 30 Count
Feosol Complete Iron Supplement Caplets, Bifera Iron for High Absorption, Heme and Non-Heme Dual Action Minimizes Side Effects, 1 Per Day, for Energy and Immune System Support, Made in USA, 30 Count
Type of Iron: heme and non-heme
Dosage: one caplet daily
Form: caplets
Side Effects: constipation, nausea
Absorption Rate: enhances absorption
MegaFood Women's One Daily Multivitamin for Women - with Iron, B Complex, Vitamin C, Vitamin D, Biotin and More - Plus Real Food - Immune Support Supplement - Bone Health - Vegetarian - 90 Tabs
MegaFood Women's One Daily Multivitamin for Women - with Iron, B Complex, Vitamin C, Vitamin D, Biotin and More - Plus Real Food - Immune Support Supplement - Bone Health - Vegetarian - 90 Tabs
Dosage: 9 mg
Form: Tablet
Additional Nutrients: B vitamins, Vitamin C, Zinc, D3
#10
7.5 score
Designs for Health Ferrochel Chelated Iron - Highly-Absorbable Iron Supplement for Women & Men as Ferrous Bisglycinate Chelate - Iron Pills Safe for Pregnant Women & Teens (120 Vegan Iron Capsules)
Designs for Health Ferrochel Chelated Iron - Highly-Absorbable Iron Supplement for Women & Men as Ferrous Bisglycinate Chelate - Iron Pills Safe for Pregnant Women & Teens (120 Vegan Iron Capsules)
Type of Iron: Iron bisglycinate
Dosage: 27 mg per capsule
Form: Capsule
Side Effects: Reduced risk of constipation
Absorption Rate: High absorption rate
How do we rank products for you?
Our technology thoroughly searches through the online shopping world, reviewing hundreds of sites. We then process and analyze this information, updating in real-time to bring you the latest top-rated products. This way, you always get the best and most current options available.
Buying Guide for the Best Iron Supplements
Choosing the right iron supplement can be crucial for addressing iron deficiency and improving overall health. Iron supplements come in various forms and strengths, and selecting the right one depends on your specific needs, health conditions, and preferences. Here are some key specifications to consider when choosing an iron supplement, along with explanations to help you make an informed decision.Type of IronIron supplements come in different forms, such as ferrous sulfate, ferrous gluconate, and ferrous fumarate. The type of iron is important because it affects how well the supplement is absorbed and tolerated by your body. Ferrous sulfate is the most commonly used and is generally well-absorbed, but it can cause gastrointestinal side effects. Ferrous gluconate and ferrous fumarate are alternatives that may be gentler on the stomach. Choose the type that best suits your digestive tolerance and absorption needs.
DosageThe dosage of iron in supplements is measured in milligrams (mg) and indicates the amount of elemental iron you will be consuming. This is important because taking too little may not correct the deficiency, while taking too much can cause toxicity. Dosages typically range from 18 mg to 65 mg per tablet. Your healthcare provider can help determine the right dosage based on your iron levels and overall health. If you have mild deficiency, a lower dose may be sufficient, while more severe deficiencies may require higher doses.
FormIron supplements are available in various forms, including tablets, capsules, liquid, and chewable. The form is important because it can affect ease of use and absorption. Tablets and capsules are convenient and have a longer shelf life, but some people may find them hard to swallow. Liquid forms are easier to ingest and can be better absorbed, but they may have an unpleasant taste. Chewable forms are a good option for those who have difficulty swallowing pills. Choose the form that you find easiest to take consistently.
Additional NutrientsSome iron supplements include additional nutrients like vitamin C, folic acid, or vitamin B12. These nutrients can enhance iron absorption and provide other health benefits. Vitamin C, for example, significantly improves iron absorption, while folic acid and vitamin B12 are important for overall blood health. If you have specific nutritional needs or deficiencies, look for a supplement that includes these additional nutrients to maximize the benefits.
Side EffectsIron supplements can cause side effects such as constipation, nausea, and stomach cramps. The likelihood and severity of side effects can vary depending on the type and dosage of iron. It's important to consider how your body reacts to different supplements. If you experience significant side effects, you may need to try a different type or form of iron, or adjust the dosage. Your healthcare provider can help you find a supplement that minimizes side effects while effectively addressing your iron deficiency.
Absorption RateThe absorption rate of an iron supplement refers to how well your body can take in and use the iron. This is important because better absorption means more effective treatment of iron deficiency. Factors that affect absorption include the type of iron, the presence of other nutrients, and whether the supplement is taken with food. Generally, ferrous forms of iron are better absorbed than ferric forms. To maximize absorption, consider taking your supplement on an empty stomach or with vitamin C, and avoid taking it with calcium-rich foods or beverages.