Major FeroSul Red vs Green: What’s the Difference?
Table of Contents
- Major FeroSul Red vs Green: What Should You Buy?
- Quick Answer: Major FeroSul Red vs Green
- Red vs Green Major FeroSul Tablets: Ingredient Comparison
- What Is FeroSul?
- Is FeroSul the Same as Ferrous Sulfate?
- What Is the Difference Between Red and Green Iron Pills?
- Inactive Ingredients in FeroSul Red vs Green Tablets
- Does FeroSul Green Contain Tartrazine?
- Which Is Better: Red or Green FeroSul?
- Major FeroSul Green Product Options
- Major FeroSul Red Product Options
- Other FeroSul and Ferrous Sulfate Alternatives
- What If Regular FeroSul Bothers Your Stomach?
- Related Iron Guides
- Bottom Line: Major FeroSul Red vs Green
- About Xeteor
- Frequently Asked Questions
If you are comparing Major FeroSul red vs green tablets, the main difference is the coating and inactive dye ingredients — not the iron strength. Both Major FeroSul Red and Major FeroSul Green contain ferrous sulfate 325 mg, which provides 65 mg of elemental iron per tablet.
The key label difference is that the green FeroSul tablet contains FD&C Yellow #5 Lake, also known as tartrazine, while the red version does not list Yellow #5 on the label we reviewed. For most shoppers, the choice comes down to availability, tablet color preference, and whether you are avoiding certain inactive color additives.
⚠️ July 2026 Update: FeroSul Red, FeroSul Green & Generic Iron Supply Status
We are monitoring the supply of Major FeroSul red tablets, Major FeroSul green tablets, regular ferrous sulfate 325 mg alternatives, liquid iron, and slow-release iron. Here is the current availability for the main iron options discussed in this guide:
Geri-Care Ferrous Sulfate 325 mg (200 Tablets): ✅ Stable Supply
Major FeroSul Green Ferrous Sulfate 325 mg (100 Tablets): ✅ Stable Supply
Major FeroSul Ferrous Sulfate 325 mg (1,000 Tablets): ✅ Stable Supply
Geri-Care Liquid Ferrous Sulfate 220 mg / 5 mL (16 fl oz): ✅ Stable Supply
GoodSense Slow Release Iron (60 Tablets): ✅ Stable Supply
Reliable 1 Ferrous Sulfate 325 mg (100 Tablets): ⚠️ Intermittent Supply
Major FeroSul Red Ferrous Sulfate 325 mg (100 Tablets): ⚠️ Intermittent Supply
Major FeroSul Red vs Green: What Should You Buy?
| If you want... | Best option | Why |
|---|---|---|
| Major FeroSul Green | Major FeroSul Green 100 Tablets | Best if you are specifically looking for the green FeroSul tablet version. |
| Bulk Major FeroSul Green | Major FeroSul Green 24-Pack | Best for facilities, caregivers, clinics, or long-term high-volume iron supply. |
| Regular ferrous sulfate 325 mg | Geri-Care Ferrous Sulfate 325 mg | Good alternative if the brand matters less than the standard 325 mg ferrous sulfate strength. |
| Large bottle regular FeroSul | Major FeroSul 325 mg - 1,000 Tablets | Best if you want a single large bottle instead of multiple smaller bottles. |
| Liquid iron | Geri-Care Liquid Ferrous Sulfate 220 mg / 5 mL | Best if you need a liquid ferrous sulfate option or have trouble swallowing tablets. |
| Red FeroSul tablets | Major FeroSul Red 100 Tablets | Best if you prefer the red tablet version or are replacing a previous red FeroSul bottle. |
| Avoiding Yellow #5 / tartrazine | Major FeroSul Red | The green version contains FD&C Yellow #5 Lake; the red version label we reviewed does not list Yellow #5. |
| Gentler slow-release iron | GoodSense Slow Release Iron 2-Pack | Best if you were told to use slow-release iron or want to compare regular iron with Slow FE-style options. |
Quick Answer: Major FeroSul Red vs Green
Major FeroSul Red and Major FeroSul Green have the same active iron strength. Both contain ferrous sulfate 325 mg, which provides 65 mg elemental iron per tablet.
The difference is the coating and inactive dye ingredients:
- Major FeroSul Red: Red tablet coating; does not list FD&C Yellow #5 Lake on the label we reviewed.
- Major FeroSul Green: Green tablet coating; contains FD&C Yellow #5 Lake, also known as tartrazine.
If your doctor recommended ferrous sulfate 325 mg, the red and green versions are the same active iron strength. If you are sensitive to certain food dyes or are trying to avoid tartrazine, the inactive ingredients matter more.
Red vs Green Major FeroSul Tablets: Ingredient Comparison
| Tablet Color | Active Ingredient | Elemental Iron | Key Color Additive Difference |
|---|---|---|---|
| Red | Ferrous Sulfate 325 mg | 65 mg | Does not list FD&C Yellow #5 Lake on the reviewed label. |
| Green | Ferrous Sulfate 325 mg | 65 mg | Contains FD&C Yellow #5 Lake, also known as tartrazine. |
What Is FeroSul?
FeroSul is a ferrous sulfate iron supplement. The standard Major FeroSul tablet contains ferrous sulfate 325 mg, which provides 65 mg of elemental iron.
This label can be confusing because iron supplements often show two different numbers:
- 325 mg ferrous sulfate = the iron compound
- 65 mg elemental iron = the actual amount of iron supplied by the tablet
So if you see searches like FeroSul 325, ferrous sulfate 325 mg tab, FeroSul iron supplement, or 65 mg elemental iron, they are usually referring to the same regular ferrous sulfate tablet category.
Is FeroSul the Same as Ferrous Sulfate?
FeroSul is a brand name for ferrous sulfate iron tablets. Ferrous sulfate is the active iron ingredient. FeroSul is one brand that sells it.
In plain English, FeroSul is the product name, while ferrous sulfate is the ingredient. A standard FeroSul 325 mg tablet provides ferrous sulfate 325 mg and 65 mg elemental iron.
What Is the Difference Between Red and Green Iron Pills?
For Major FeroSul red vs green, the difference is the tablet coating and inactive dye ingredients. The iron strength is the same.
- Both versions: Ferrous sulfate 325 mg / 65 mg elemental iron.
- Red version: Red coating and red/blue color additives.
- Green version: Green coating with FD&C Yellow #5 Lake, FD&C Blue #1 Lake, and FD&C Red #40 Lake listed on the label.
That means the green tablet is not “stronger” than the red tablet. The difference is the coating, not the amount of iron.
Inactive Ingredients in FeroSul Red vs Green Tablets
The inactive ingredients are where the red and green versions differ. These ingredients are used for tablet structure, coating, color, and manufacturing. They do not change the 65 mg elemental iron strength.
FeroSul Red tablets may include color additives such as:
- FD&C Red #40 Lake
- FD&C Blue #2 Lake
FeroSul Green tablets may include color additives such as:
- FD&C Red #40 Lake
- FD&C Blue #1 Lake
- FD&C Yellow #5 Lake
Why this matters: FD&C Yellow #5 Lake is also called tartrazine. Some customers specifically avoid Yellow #5 due to sensitivities, allergy concerns, or personal preference. If that applies to you, check the label carefully before choosing the green version.
Does FeroSul Green Contain Tartrazine?
Yes. The Major FeroSul Green label lists FD&C Yellow #5 Lake, which is also known as tartrazine.
This does not change the active iron strength. The green tablet still provides ferrous sulfate 325 mg and 65 mg elemental iron. But if you are specifically avoiding tartrazine or Yellow #5, that inactive ingredient difference may affect your choice.
Which Is Better: Red or Green FeroSul?
Neither version is automatically “better” for everyone. The right choice depends on what you are trying to match, avoid, or replace.
| Choose this option | When it makes sense |
|---|---|
| FeroSul Red | You used the red bottle/tablet before, prefer the red version, or want to avoid Yellow #5 based on the reviewed label. |
| FeroSul Green | You are looking specifically for the green FeroSul tablet version or need a currently available Major FeroSul Green supply option. |
| Geri-Care Ferrous Sulfate 325 mg | You mainly need regular ferrous sulfate 325 mg and are flexible on brand or tablet color. |
| Reliable 1 Ferrous Sulfate 325 mg | You want another regular ferrous sulfate 325 mg option when supply is available. |
| Geri-Care Liquid Ferrous Sulfate | You need a liquid iron option or have trouble swallowing tablets. |
| GoodSense Slow Release Iron | You were told to use slow-release iron or want to compare standard ferrous sulfate with a Slow FE-style option. |
Major FeroSul Green Ferrous Sulfate 325 mg – 100 Tablets | Compare to Feosol®
$9.99
Major FeroSul Green Ferrous Sulfate 325 mg – 100 Tablets | Compare to Feosol® Daily Iron Supplement for Iron Deficiency Support Major FeroSul Green Ferrous...… read more
View ProductMajor FeroSul Green Product Options
If you are specifically looking for Major FeroSul Green, Xeteor currently carries both a single-bottle option and a 24-pack bulk case.
- Major FeroSul Green Ferrous Sulfate 325 mg - 100 Tablets – Best if you only need one bottle or want to try the green tablet version first.
- Major FeroSul Green Ferrous Sulfate 325 mg - 24-Pack Bulk Case – Best bulk value for facilities, caregivers, clinics, or high-volume supply.
Major FeroSul Ferrous Sulfate 325 mg - 1000 Tablets | Feosol
$21.99
Major FeroSul Ferrous Sulfate 325 mg – 1000 Tablets | Compare to Feosol® Bulk Nutritional Support for Iron Deficiency and Anemia Major FeroSul Ferrous Sulfate...… read more
View ProductMajor FeroSul Red Product Options
If you prefer the red tablet version, these Major FeroSul Red options may be useful when available.
- Major FeroSul Red - Single Bottle, 100 Tablets – Standard red FeroSul option with ferrous sulfate 325 mg.
- Major FeroSul Red - 2-Pack, 200 Tablets – Free-shipping bundle for regular users.
- Major FeroSul Red - 1000-Tablet Bulk Bottle – Larger bottle for long-term or institutional-style supply.
Geri-Care Iron Ferrous Sulfate 325 mg - 200 Tablets | Compare to Feosol (3 Pack)
$25.99
Geri-Care Ferrous Sulfate 325 mg (65 mg Elemental Iron) – 600 Tablets Total (3-Pack Bundle) | Compare to Feosol® Original Essential Mineral Support for Red...… read more
View ProductGeri-Care Iron Supplement Liquid Ferrous Sulfate 220 mg / 5 mL - 16 fl oz | Compare to Feosol
$11.99
Geri-Care Iron Supplement Liquid, Ferrous Sulfate 220 mg/5 mL – 16 fl oz | Compare to Feosol Liquid Support for Iron Deficiency and Anemia Geri-Care...… read more
View ProductOther FeroSul and Ferrous Sulfate Alternatives
If you do not specifically need Major FeroSul, there are other ferrous sulfate and iron supplement options that may work depending on your preferred format, bottle size, and supply availability.
| Alternative | Best for | Link |
|---|---|---|
| Geri-Care Ferrous Sulfate 325 mg | Customers who want regular ferrous sulfate 325 mg in a larger 200-count bottle. | Shop Geri-Care |
| Geri-Care Ferrous Sulfate 325 mg 3-Pack | Customers who want bulk regular ferrous sulfate with free shipping. | Shop Geri-Care 3-Pack |
| Reliable 1 Ferrous Sulfate 325 mg | Another regular ferrous sulfate 325 mg option when available. | Shop Reliable 1 |
| Major FeroSul Ferrous Sulfate 325 mg - 1,000 Tablets | Customers who want a single large bottle instead of multiple smaller bottles. | Shop Major FeroSul 1,000 Tablets |
| Geri-Care Liquid Ferrous Sulfate | Customers who need liquid iron or have trouble swallowing tablets. | Shop Liquid Iron |
| GoodSense Slow Release Iron | Customers comparing regular ferrous sulfate with Slow FE-style slow-release iron. | Shop GoodSense Slow Release Iron |
GoodSense Slow Release Iron - 60 Tablets | Compare to Slow FE
$7.99
GoodSense Slow Release Iron (45 mg Iron) – 60 Tablets | Compare to Slow FE® Gentle, Time-Release Iron Supplement for Sensitive Stomachs GoodSense® Slow Release...… read more
View ProductWhat If Regular FeroSul Bothers Your Stomach?
Regular ferrous sulfate tablets can cause digestive side effects for some people, including constipation, nausea, stomach upset, or dark stools. If regular FeroSul bothers your stomach, you may want to compare it with slow-release iron options.
Slow-release iron is not the same as FeroSul. It is a different iron format designed to release more gradually. For a deeper comparison, read our Feosol vs Slow FE Generic Iron Guide.
Slow-release iron option:
- GoodSense Slow Release Iron - 120 Count, 2-Pack Bundle – A Slow FE-style option for customers comparing regular ferrous sulfate with slow-release iron.
GoodSense Slow Release Iron - 60 Tablets | Compare to Slow FE (2 Pack)
$14.99
GoodSense Slow Release Iron (45 mg Iron) – 60 Tablets (2 Pack) | Compare to Slow FE® Stock Up & Save: Gentle, Time-Release Iron Supplement...… read more
View ProductRelated Iron Guides
Bottom Line: Major FeroSul Red vs Green
The bottom line on Major FeroSul red vs green is simple: the active iron strength is the same, but the inactive color ingredients are different.
Both red and green FeroSul tablets provide ferrous sulfate 325 mg and 65 mg elemental iron. The green version contains FD&C Yellow #5 Lake / tartrazine, while the red version label we reviewed does not list Yellow #5. If you are avoiding certain dyes, compare the label carefully. If you only need regular ferrous sulfate 325 mg, Geri-Care, Reliable 1, Major, and other ferrous sulfate options may also be worth comparing based on availability.
Geri-Care Iron Ferrous Sulfate 325 mg - 200 Tablets | Compare to Feosol
$9.99
Geri-Care Ferrous Sulfate 325 mg (65 mg Elemental Iron) – 200 Tablets | Compare to Feosol® Original Essential Mineral Support for Red Blood Cell Production...… read more
View ProductMajor FeroSul Green Ferrous Sulfate 325 mg – 100 Tablets | Compare to Feosol® (24 Pack)
$79.99
Major FeroSul Green Ferrous Sulfate 325 mg – 2400 Tablets Total (24-Pack Bulk Case) | Compare to Feosol® Daily Iron Supplement for Iron Deficiency Support...… read more
View ProductReliable 1 Ferrous Sulfate 325 mg - 100 Tablets | Compare to Feosol
$5.99
Reliable 1 Ferrous Sulfate 325 mg – 100 Tablets (Red) | Compare to Feosol® High-Potency Iron Supplement with a Mineral-Based Binder Support healthy red blood...… read more
View ProductReliable 1 Ferrous Sulfate 325 mg - 100 Tablets | Compare to Feosol (5 Pack)
$19.99
Reliable 1 Ferrous Sulfate 325 mg – 500 Tablets (5 Pack) | Compare to Feosol® Stock Up & Save: High-Potency Iron with a Clean Label...… read more
View ProductAbout Xeteor
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Our OTC generic portfolio includes:
- Tier 1 Premium Generics: GoodSense and Foster & Thrive.
- Tier 2 Standard Generics: Geri-Care, Reliable 1 Laboratories, Oncor Pharmaceuticals, and Health Star.
- Tier 3 Value Generics: Major Pharmaceuticals and Rugby Laboratories.
Many customers also come to Xeteor.com for affordable cash-pay diabetic testing supplies, especially blood glucose test strips, meters, lancets, control solution, and related diabetes supplies. Explore our Diabetes Management Guides, including guides for CareSens Test Strips, True Metrix Test Strips, and Original Bayer Contour Test Strips.
Xeteor is top-rated across major platforms including Trustpilot, Google, eBay, Amazon, and Walmart, with over 10,000 customer reviews across major platforms. Our goal is to combine clear product guidance, reliable products, and real human support by phone, email, and text.
For more plain-English comparisons, visit the Xeteor OTC & Diabetes Guides.
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Disclaimer: This content is for informational purposes only and is not a substitute for professional medical advice. Always read and follow the product label. If you have a medical question, ask your doctor, pharmacist, or other qualified healthcare professional.
Important: Xeteor.com sells over-the-counter products, diabetic testing supplies, vitamins, and healthcare essentials. We do not sell, dispense, or fulfill prescription medications. OTC generic comparisons are based on factors such as active ingredient, strength, dosage form, package size, labeling, availability, and practical use case. Diabetes testing supplies must be compatible with the meter or device being used. Inactive ingredients, packaging, taste, texture, sourcing, expiration dating, and fulfillment path can vary.
Frequently Asked Questions
What’s the difference between Major FeroSul Red and Green Tablets?
The active iron strength is the same. Both Major FeroSul Red and Major FeroSul Green contain ferrous sulfate 325 mg and provide 65 mg elemental iron per tablet. The main difference is the tablet coating color and inactive dye ingredients.
Does Major FeroSul Green contain tartrazine?
Yes. The Major FeroSul Green label lists FD&C Yellow #5 Lake, also known as tartrazine. If you are sensitive to Yellow #5 or prefer to avoid it, compare the label carefully before choosing the green version.
Is FeroSul the same as ferrous sulfate?
FeroSul is a brand name for a ferrous sulfate iron supplement. Ferrous sulfate is the active ingredient. A standard FeroSul 325 mg tablet contains ferrous sulfate 325 mg and provides 65 mg elemental iron.
Is the green FeroSul tablet stronger than the red FeroSul tablet?
No. The green and red Major FeroSul tablets are the same active strength. Both provide ferrous sulfate 325 mg and 65 mg elemental iron per tablet.
What is a ferrous sulfate 325 mg green tablet?
A ferrous sulfate 325 mg green tablet is a green-coated iron supplement that provides 65 mg elemental iron. Major FeroSul Green is one example of a green ferrous sulfate 325 mg tablet.
Which FeroSul tablet should I buy?
If you specifically want the green version, choose Major FeroSul Green. If you prefer the red version or want to avoid Yellow #5 based on the reviewed label, choose the red version when available. If you mainly need regular ferrous sulfate 325 mg, compare Geri-Care, Reliable 1, Major, and other ferrous sulfate options based on current availability.
What is FeroSul used for?
FeroSul is an iron supplement used to support iron intake when iron supplementation has been recommended. Ask your doctor before starting iron, especially if you are pregnant, breastfeeding, taking medication, or unsure whether you need iron.
Can FeroSul cause side effects?
Like many iron supplements, FeroSul may cause constipation, nausea, stomach upset, or dark stools. Contact a healthcare provider if side effects are severe, persistent, or concerning.
Should I take FeroSul or slow-release iron?
FeroSul is a regular ferrous sulfate 325 mg tablet. Slow-release iron is a different format that releases iron more gradually. Some customers compare slow-release iron when standard ferrous sulfate bothers their stomach, but you should follow your healthcare provider's recommendation.
What is the most important safety warning for iron tablets?
Keep iron supplements out of reach of children. Accidental overdose of iron-containing products can be dangerous, especially for children under 6. In case of accidental overdose, call a doctor or Poison Control Center immediately.
