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Top 8 Best Slow Release Iron Supplement

Written by Andrew Le, MD

UpdatedOctober 23, 2024

Iron is considered an important mineral for the normal functioning of the human organism. It is involved with the synthesis of hemoglobin, iron-containing protein in red blood cells responsible for transportation of oxygen in the body. Iron deficiency has been known to cause too much tiredness and also weak immune system resulting to anemia. Thus, a normal diet can satisfy the demand for iron; however, some people may need supplements to do so.

Slow-release supplements are thought to be superior to quickly absorbed ones when it comes to iron supplementation. The types of iron supplements that the recommended are the slow-release iron supplements These releases the iron in your body slowly and gradually thus minimizing the chances of side effects like constipation, nausea and stomach upsets. Second, slow-release iron supplements absorbs better in the body than the fast-release products which makes the slow-release products better.

We have devoted several hours to reearch and analyze different slow-release iron supplements before defining which ones are the most effective and at the same time, easy on the stomach.

Top 3 Best Slow Release Iron Supplements

  1. Slow Fe Iron Supplement
  2. 21st Century Slow Release Iron Tablets
  3. Slow Fe 45mg Iron Supplement

In this article, we are providing the list of slow release iron supplements which is available on Amazon. Our analysis was based on quality, effectiveness, and customer based evaluation, so that you can be in a position to make the right analysis, before you decide on the right supplement to go for.


Slow Fe Iron Supplement

Editor's Choice

Slow Fe Iron Supplement

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Slow Fe 45mg Iron Supplement is one of those rare iron supplements that are formulated with a high potency while at the same time being very gentle on your stomach.

Pros

  • Easy-to-swallow tablets
  • It releases the iron gradually hence resulting into few side effects affecting the digestive system.
  • Iron tablets for the deficiency of iron were recommended by more than one doctor.

Cons

  • Some users complained of mild nausea or stomach discomfort
  • May cause constipation in some individuals

We have been taking Slow Fe Iron Supplement for few months now and believe me it really works. The slow release system releases it in a gradual manner and we have not suffered from the digestion complaints, which are usually associated with most types of iron supplements that we have used in the past.

Slow Fe is the first doctor recommended iron supplement for iron deficiency, this makes us have faith that what we are taking is quality and what we need. In addition, the medication in the form of tablets is easy enough to swallow, which can be considered an advantage.

However, we felt a slight nausea and stomach upset after taking the supplement. Others have also noted cases of constipation but we have not personally come across this.


21st Century Slow Release Iron Tablets

21st Century Slow Release Iron Tablets

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For those people looking for a very potent iron supplement that does not easily upset the stomach 21st Century Slow Release Iron Tablets would be very useful.

Pros

  • Gluten-free formula
  • Gentle on your system
  • High potency

Cons

  • Contains artificial colors
  • May cause stomach upset in some users

We have used 21st Century Slow Release Iron Tablets and we can now confirm that taking the tablets increases the level of iron and does not produce heavy side effects. This slow-release formula is very effective as it allows the irregular release of the iron and less chances of upsetting the stomach and causing constipation.

It is a gluten-free product, and does not contain sugar, salt, yeast, or products used for preservation. High potency formula create the assure that you will get the maximum benefit from every tablure that you take.

However, the tablets are large and may be problematic to swallow for some of the patients. Also, it has artificial colours, hence may not be suitable to those who wish to avoid this ingredient.


Slow Fe 45mg Iron Supplement

Slow Fe 45mg Iron Supplement

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If you are particular with the kind of iron supplement you are going to take or give to someone you know, the Slow Fe 45mg Iron Supplement is the best one to take.

Pros

  • Doctors highly advise this when it comes to iron deficiency.
  • An iron supplement with an especially great capacity for your body that’s easy on the stomach.
  • Slow-release system which is to minimize pain.

Cons

  • May cause digestive side effects in some people
  • May not be ideal for individual with certain medical conditions

Slow Fe 45mg Iron Supplement is something we have been taking for some time now and the changes we have experienced are marvellous. I have not had any problem with it; it does not stick to the throat nor cause constipation, which had been the issue with some iron supplements we have used before. We also wanted to address that it is very important for people with anemia as it is quite good for the health, recommended by doctors for iron deficiency.

The slow release system is another great function of this supplement that has surprised me. This gets the iron supply to the body slowly and this cuts down stocking digestive side effects. We have established that after intake of Slow Fe 45mg Iron Supplement, we do not feel nauseas or have upset stomachs as is customarly felt when undergoing other forms of Iron supplements that we have previously taken.

However, only the iron content is in this supplement and no other vitamin or mineral. If you want something that could provide more coverage in terms of multivitamin, then perhaps you should go for a better brand. Moreover, if you intend to use this supplement, you should first discuss with your doctor especially if you have any health complication or are under any medication.


Carlyle Slow Release Iron Supplement

Carlyle Slow Release Iron Supplement

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The Carlyle Slow Release Iron Supplement i ideal for those looking for a high-quality iron supplement that is easy to absorb and gentle on the stomach.

Pros

  • Has 45mg of iron (elemental) in the tablet which is 250 % of daily requirements.
  • With slow-release formula, it guarantees that the nutrients in the supplements will be properly absorbed by the body.
  • Organically, there is no gluten, GMO or preservative involved in the production of the food.

Cons

  • Some users may experience mild stomach upset
  • Tablets are on the larger side

I have been using the Carlyle Slow Release Iron Supplement for some weeks now and I have realized there is a big boost in my energy. The slow-release formula has also prevented nausea and stomach aches that accompany iron supplements’ consumption. Iron in amounts of 45 mg is provided by each tablet, and it should be a suitable dosage for most people.

However, this supplement can not be used for those who do not require taking iron. To determine whether you need iron supplements or not in cases which you are in doubt, it is advised to consult your doctor. Furthermore, unlike some multivitamins you can need to take it for several weeks before seeing the changes.

All in all, for those who are looking for a slow release iron tablet that is relatively easy of the stomach, Spring Valley Slow-Release Iron Tablets Dietary Supplement, 45 mg, 30 Count is a good choice.


Spring Valley Slow-Release Iron Tablets Dietary Supplement, 45 mg, 30 Count

Spring Valley Slow-Release Iron Tablets Dietary Supplement, 45 mg, 30 Count

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If you want to take a slow release iron supplement, Spring Valley Slow-Release Iron Tablets Dietary Supplement, 45 mg, 30 Count is one of the best options.

Pros

  • This nutritional supplement might help to maintain proper red blood cell synthesis.
  • The amount of supplementary iron provided in each tablet is 45 mg of elemental iron (dry ferrous sulfate 144 mg).
  • The steady, slow liberation of the mineral might help come across gastrointestinal side effects.

Cons

  • Results may take time to be noticeable
  • It may cause constipation or diarrhea in some users

We have been using this supplement for a few weeks now and we have realized there is a big boost in our energy. The slow-release formula has also prevented nausea and stomach aches that accompany iron supplements’ consumption. Iron in amounts of 45 mg is provided by each tablet, and it should be a suitable dosage for most people.

However, this supplement can not be used for those who do not require taking iron. To determine whether you need iron supplements or not in cases which you are in doubt, it is advised to consult your doctor. Furthermore, unlike some multivitamins you can need to take it for several weeks before seeing the changes.

All in all, for those who are looking for a slow release iron tablet that is relatively easy of the stomach, Spring Valley Slow-Release Iron Tablets Dietary Supplement, 45 mg, 30 Count is a good choice.


Mason Natural Slow Release Iron

Mason Natural Slow Release Iron

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For an iron supplement that's gentle on your stomach, count on Mason Natural Slow Release Iron.

Pros

  • Contains a potent amount of iron that can aid in reducing blood formation.
  • The differential advantage of slow release tablets could be that they do not upset the stomach as easily.
  • Fulfilling the promise of being free of sugar, starch, sodium, yeast, soy, corn, wheat, dairy, fish, tree nuts, peanuts, egg, fragrance, artificial flavors, and preservatives.

Cons

  • May cause constipation if taken in excess.
  • Not ideal for individuals with severe iron deficiency.

We've been using Mason Natural Slow Release Iron for a few weeks now and have observed significant changes in the increase of our energy level. The tablets are mild, small and does not have a nauseating smell as most other medicines have. These we understand as being purposely manufactured not to cause any irritation to our stomachs, something that is usually associated with most Iron supplements.

However, it is vital to appreciate that if you are severally iron deficient, then these supplements will not be adequate to attend to your predicament. It is always wise to discuss any new supplement with your doctor.

Therefore, those looking for a milder yet efficient iron product should go for Mason Natural Slow Release Iron.


Slow Fe Slow Release Iron, 60 Tablets (Pack of 2)

Slow Fe Slow Release Iron, 60 Tablets (Pack of 2)

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If you are in search of a product that gives you a potent, slow release iron supplement then Slow Fe is the right product for you.

Pros

  • It is convenient to take once a day dosage hence making it easy to re-mind one self of the dosage.
  • The slow release formula will help to eliminate some of the GI side effects.
  • Easy to swallow tablets

Cons

  • Packaging can be difficult to open
  • May not be suitable for individuals who require a higher iron dosage

We've been using Slow Fe for several months and we have noticed an increase in our level of iron. It has a once a day dose which is easy to manage and the slow release formula has stopped the Stomach upsets we used to have when using other iron supplements. These tablets can be swallowed and we acknowledge that they are small.

However, each pill comes in its own aluminum foil wrapper, which are not very convenient if you are, for instance, on a business trip. The package can also be hard to open sometime or at certain times. Besides, if you need a substantial dose of iron, then this supplement may not work for you.

All in all, we recommend Slow Fe to anyone in need of a slow release iron supplement. It’s potent, readily absorbed through the stomach and causes less change to the normal condition in the body.


Carlyle Iron Pills for Women

Carlyle Iron Pills for Women

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If you are interested in a very soft, but tasty iron supplement, Carlyle Iron Pills for Women might be yours.

Pros

  • Designed specifically for women
  • Slow-release formula supports correct and maximal assimilation of the iron by the organism.
  • These tablets do not contain any vegetable origin ingredients, are non-radiated, non-GMO, do not contain gluten, wheat, yeast, lactose, artificial sweeteners, and preservatives.

Cons

  • The tablets are too small and difficult to swallow.
  • The tablets contain food dye.

Carlyle Iron Pills for Women have improved my energy in the past few weeks and I have started to become involved in different activities again. There is no problem of digesting pains or constipation that is usually associated with the intake of iron supplements. The slow-release formula means that the iron being taken into the body is taken gradually which is actually healthier since the body does not experience a rush of iron at a time.

Carlyle is a renowned brand that deals with supplements, and as such, it offers the best supplements to its clients. It is good to note that these tablets are vegetarian, non-GMO and do not contain the most popular allergies. It has 200 tablets packed in the bottle and that is quite reasonable in terms of the price.

Overall, if you are looking for tender, sufficiently powerful and absolutely costless iron supplement, Carlyle Iron Pills for Women may turn to be all the same a worthy buy.

Buying Guide

Type of Iron

There are two main types of iron in supplements: The fat soluble and the water soluble vitamin, the latter of which can be divided into heme and non heme. There is heme and non-heme iron, heme iron being the iron that is gotten from animal produce and is said to be absorbed easily than the non-heme. Hem iron comes from animal products while non-hem iron comes from plant products and it is least absorbable. Nonetheless, slow release non-heme iron supplements are as effective as heme iron supplements because they supply the iron at a slow rate to enhance absorption.

Dosage

The dosage of the iron content in a supplement are also worth taking into consideration. Taking excessive iron content can be toxic while taking the required amount may not be very beneficial. This is why it is advised to adhere to usage instructions printed at the product’s packaging and to seek help from a doctor and/or a pharmacist, if there are any questions.

Form of Iron

Slow release iron supplements come in different forms, including tablets, capsules, chewable, and liquid. Tablets and capsules are easily transportable, and liquids are easier to gulp down especially by people with difficulties swallowing. carefully select a form that you can easily take and in a way that is less inconveniencing to you.

Additional Nutrients

Some slow release iron supplements may also contain other nutrients that can enhance absorption of iron such as Vitamin C. Due to this, it is important that one educates himself on the available supplements and their labels so that they can pick the ones that contain the nutrients which is important for them.

Frequently Asked Questions

What is the difference between Slow Fe and ferrous sulfate?

Slow Fe and ferrous sulfate are both considered to be iron supplements. However, Slow Fe is a slow release containing iron supplement that is expected to work slowly in releasing this vital mineral while ferrous sulfate is an immediate release containing iron supplement that works almost instantly to release the mineral. Slow Fe is normally advised to those who get side effects of their gastrointestinal system every time they take iron supplements in their immediate release form.

Which type of iron supplement is best absorbed by the body?

Heme iron is absorbed from food of animal origin, and non-heme one, originating from plant products and fortified meals, the first one being more efficient. However, for those who are unable to get adequate amounts of heme iron in their diets taking iron supplements can help in a great way. Iron and folic acid preparations are usually slow release preparations such as Slow Fe because these preparations are the least likely to precipitate gastrointestinal side effects and are better absorbed than the immediate release preparations.

What are the benefits of taking a slow release iron supplement?

Slow release iron supplements are preferred due to how they work, for instance Slow Fe can be used in increasing the amount of iron for people with low levels of iron. Slow Fe is usually advised because it is not as harsh on the stomach as other kinds of iron supplements that are rapidly absorbed. Furthermore, slow release iron supplements are more easily absorbed in the body this makes it possible for one to get the same amount of boost they would get from an immediate release iron supplement by taking less of it.

What are the side effects of Slow Fe iron supplement?

Like all other iron supplements Slow Fe has been known to cause some side effects on the gastrointestinal system such as constipation, diarrhea, and stomach upsets. Still, the slow-release iron supplements are at the lesser risk of having such side effects as compared to the immediate-release iron supplements. Any side effect that manifest itself when Slow Fe is consumed should prompt the user to consult their healthcare provider.

What are the best iron supplements for anemia?

The best iron supplements for anemia will depend on the patient’s unique condition and previous medical history. Slow release capsules of iron like Slow Fe are normally preferred because they do not have severe side effects like stomach upsets and are absorbed by the body more effectively than IR iron supplements. However, it is advisable to consult a doctor first before incorporating any new supplement to the body.

How can I maximize the absorption of iron supplements?

To enhance on the absorption of the iron supplements, they are supposed to be taken on an empty stomach with a glass of orange juice or vitamin C supplement. Also, it is essential to coordinate with the intake of iron supplements with other products as iron absorption is inhibited when iron supplements are taken alongside dairy products, calcium supplements, or antacids.

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