10 Best Ferrous Sulfate 325 Mg Supplements in 2026

A 180-day supply means you only need to think about your iron protocol twice a year, which is a significant convenience for anyone managing a long-term deficiency. This is combined with the USP verification stamp, a concrete benchmark for purity and accurate dosing. Together, these features make it a reliable, set-it-and-forget-it foundation. It’s straightforward, from a brand pharmacists frequently point to, and it delivers the standard 65 mg elemental iron dose without extra frills. That is exactly what you want when bloodwork confirms you need consistent, basic supplementation.

The trade-off is in the formulation’s simplicity. It’s just ferrous sulfate, so if you’re someone whose stomach rebels against this form, you’ll need to pair it with a meal as instructed and may still experience discomfort. For a more stomach-friendly approach without taking two separate pills, you’d look at something like NutraHarmony’s capsules which include a slow-release design and complementary vitamins. But for pure, verified, no-nonsense iron delivery backed by a trusted name, this bottle’s six-month supply removes a lot of guesswork and bottle-swapping from your routine.

A single tablet delivers 65 mg of elemental iron from ferrous sulfate, a straightforward dose for someone focused on supporting cellular energy and red blood cell production as outlined on the label. This makes it a sensible pick for individuals, particularly women, whose needs are increased by menstruation or pregnancy and who want a simple, one-pill-daily routine from a familiar name in the supplement aisle.

Nature’s Bounty Iron 65mg Tablets provide a 100-tablet supply, offering a straightforward daily supplement from a brand with decades of research behind it. The count is lower than some alternatives, like Nature Made’s 180-tablet bottle, which means refills are needed more frequently. These gluten-free, vegetarian tablets deliver ferrous sulfate without additional active ingredients, focusing solely on iron’s role in red blood cell production and energy utilization.

Each Feosol tablet delivers a high-potency dose of 65 mg iron, which directly targets significant deficiency. This, combined with its use of the straightforward ferrous sulfate form, is precisely why it’s the type of iron supplement you’ll find on a prescription pad. It’s a logical pick for someone with confirmed low levels who needs a no-frills, potent rebuild of their iron stores and red blood cell production.

This potency is overkill for general maintenance, and the formula lacks supporting nutrients like vitamin C, which some competitors include to aid uptake. Compared to something like the Vitamatic Ferrous Sulfate with Vitamin C, Feosol is a purist’s tool, utterly effective for its singular purpose, but you’re handling the full biochemical logistics yourself. It assumes you and your doctor are managing the protocol.

The inclusion of 100 mg of Vitamin C with each 65 mg dose of elemental iron is the central feature here, directly addressing a common absorption hurdle. This makes it a straightforward choice for someone whose primary focus is ensuring they get the most from a basic ferrous sulfate formula, without the need to coordinate a separate ascorbic acid supplement. It’s for the buyer who values that specific, synergistic combination in a single tablet from a US-made, clean-label product.

Vitamatic Ferrous Sulfate provides a targeted formula focused on delivering a 65 mg iron dose, and it includes 100 mg of Vitamin C to aid absorption. This contrasts with combination supplements like NutraHarmony, which add vitamins such as B12 and folate. The product is designed for those seeking a high-potency iron supplement without additional supporting nutrients.

The central feature here is a 65 mg iron dose delivered through a slow-release capsule, designed to bypass the stomach and dissolve in the intestines. This approach directly targets the common complaints of heaviness and constipation that derail many iron regimens. For anyone whose previous attempts at supplementation have been cut short by digestive revolt, this specific engineering makes it a compelling option. The added vitamins C, B12, and D3 aren’t just filler; they’re there to support the iron’s role in energy and cognitive function, which is a thoughtful touch for those managing low-level fatigue.

The 60-capsule bottle provides a 60-day supply, so you will need a new one every two months. This is a shorter duration than the 180-count bottles offered by brands like Nature Made or Horbäach. The formulation uses a slow-release technology designed to improve tolerance by releasing iron gradually in the intestines, which can help reduce common digestive discomfort.

A bottle of 240 tablets provides a several-month supply, which reduces how often you need to restock. Each serving delivers 65 mg of iron as ferrous sulfate, a straightforward formulation for those with a long-term need. The product is made without gluten, artificial colors, or preservatives, aligning with a clean supplement choice from a brand that emphasizes transparency.

You’re getting elemental iron and little else, with no vitamin C to aid uptake and no special coating to ease digestion. Compared to something like the NutraHarmony capsules which bundle supporting nutrients, this is a focused, foundational option. The bottle itself is also one of the taller ones here, so it will command more shelf space. For the individual who has their supplementation protocol dialed in and just needs a reliable, high-quantity source of iron, this fits. If you’re still figuring out stomach tolerance or want a more comprehensive blend, another pick might serve better.

Each Horbäach tablet provides a 65 mg iron dose, which meets 361% of the daily value, making it a high-potency option for addressing a deficiency. The product is laboratory tested and formulated without gluten, wheat, yeast, milk, lactose, artificial flavors, or artificial colors. This combination suits someone who needs a straightforward, high-dose iron supplement from a brand that highlights its testing and exclusion of common ingredients.

This high dose means the product is intended for targeted nutritional support rather than casual maintenance. The tablet uses a coated ferrous sulfate format without additional nutrients, unlike blends such as NutraHarmony which include vitamins like C and B12. Horbäach’s bottle dimensions are 2.0 by 2.0 by 3.4 inches, similar in size to offerings from brands like Nature Made and Nature’s Truth.

A 65 mg dose of elemental iron delivers over twice the daily value in a single tablet, making it a straightforward choice for someone with a confirmed deficiency needing a high-potency protocol. This is for the person who has run the bloodwork, discussed it with their doctor, and needs a no-frills, high-strength formula to aggressively address low levels. The 200-tablet count means you’re set for a long course without frequent reordering.

These iron tablets are naturally gray because they contain no artificial colors, so the shade can vary from one pill to the next. It’s a purely functional design focused on the supplement itself. The bottle is 3.5 inches long, which is a bit larger than some competitors like Feosol, but it holds 200 tablets for a long-term supply.

The enteric coating on these 324 mg ferrous sulfate tablets is the main event. It’s designed to pass through the stomach before dissolving, which can be a straightforward solution for anyone whose previous iron supplements have caused significant gastric distress. This makes it a logical pick for those prioritizing gastrointestinal comfort above all else when addressing a deficiency.

This is a bare-bones formulation. Unlike options like Vitamatic Ferrous Sulfate with Vitamin C, it lacks ascorbic acid to enhance iron uptake, and it doesn’t bundle in other supportive nutrients. You’re getting a targeted, stomach-friendly delivery method for a standard dose of iron, which simplifies the protocol but might require a separate vitamin C supplement if optimal absorption is a concern.

This bulk approach suits anyone who has confirmed through bloodwork that they need long-term iron supplementation and prefers to minimize reordering. The dose is the standard 325mg ferrous sulfate, delivering 65mg of elemental iron, so it’s a straightforward workhorse without extra vitamins or specialized coatings.

You get three bottles totaling 0.4 pounds, which creates a larger storage footprint than keeping a single bottle of Feosol Original on hand. Compared to the single 180-tablet bottle from Nature Made, this three-pack offers more total tablets but in a less space-efficient format. It’s a simple, no-frills stock-up option for a confirmed need.