Iron supplements for energy and iron deficiency support

Iron deficiency is the most widespread nutritional deficiency globally, and in the UK it remains disproportionately common among women of reproductive age, pregnant women, vegetarians and vegans, and people with chronic conditions affecting absorption. When it comes to choosing a supplement, the shelf is full of options, but Floradix and Feroglobin consistently come up as the two most recommended liquid iron supplements in UK pharmacy practice.

The choice between them matters more than people often realize, because the form of iron used, the cofactors included, and the formulation approach all affect how well the supplement is absorbed and tolerated.

Pearl Chemist Group stocks the full Floradix and Feroglobin ranges. Browse our iron supplements by ingredient section for all available options.

Iron Bioavailability: Why the Form of Iron Matters

Not all iron supplements are equivalent. The key variable is bioavailability, meaning how much of the iron in a supplement is actually absorbed into circulation. Inorganic iron salts such as ferrous sulfate, which is the standard NHS-prescribed iron supplement, provide high elemental iron content but are frequently associated with gastrointestinal side effects including nausea, constipation, and abdominal cramping because unabsorbed iron in the colon is fermented by gut bacteria.

Both Floradix and Feroglobin use ferrous gluconate as their iron source, an organic iron salt that is generally better tolerated than ferrous sulfate. The bioavailability of ferrous gluconate is slightly lower than ferrous sulfate per milligram, but the improved tolerability means people are more likely to take it consistently, which in practice often produces better outcomes. Absorption of any non-haem iron (the form found in supplements and plant foods) is also significantly enhanced by simultaneous consumption of vitamin C, and both Floradix and Feroglobin factor this into their formulations.

The Floradix Range: Products Explained

Floradix is produced by Salus-Haus in Germany and has been formulated since the 1950s. Its base is a concentrated fruit juice and herbal extract blend that includes rosehip, carrot, spinach, and nettle extracts, ingredients traditionally associated with iron-rich or hematopoietic (blood-building) properties. The B vitamins included are not incidental additions: vitamin B12 and folate are essential cofactors for red blood cell production, and deficiencies of both can cause anemia that is clinically indistinguishable from iron deficiency anemia on initial presentation.

Floradix Formula Iron Extract 250 ml

The Floradix Formula Iron Extract 250 ml is the brand's entry-level liquid size, providing the full herbal-mineral formula in a compact bottle that is ideal for those trying Floradix for the first time or for occasional top-up supplementation. Each 10 ml serving delivers approximately 7.5 mg of elemental iron from ferrous gluconate alongside vitamins B1, B2, B6, B12, and vitamin C. The smaller size allows a practical commitment before purchasing the larger format, and it stores conveniently once opened, as it needs refrigerating after use. It is free from artificial preservatives, colorings, and lactose.

Floradix Liquid Iron Formula 500 ml

The Floradix Liquid Iron Formula 500ml is the most widely stocked format and the best-value option for those using Floradix as a regular supplement. It provides the same ferrous gluconate and B vitamin formula as the 250 ml version across a longer supply and includes a pump measure for convenient and hygienic daily dosing. At the standard dose of 10 ml twice daily, a 500 ml bottle provides approximately 25 days of supplementation. The pump format also reduces the risk of over-pouring and makes it easier to build the supplement into a morning and evening routine consistently.

Floradix Iron and Vitamin Tablets 84

The Floradix Iron and Vitamin Tablets 84 offer the same core nutritional profile as the liquid formula in a convenient tablet format, suited to those who find liquid supplements impractical for work or travel, or who simply prefer a tablet over a liquid. Each tablet delivers iron from ferrous gluconate alongside B vitamins and vitamin C. The tablet format is also naturally free from the fruit juice and herbal extract base of the liquid, making it a useful alternative for anyone who finds the distinctive Floradix taste difficult to manage. A pack of 84 tablets represents a full course at the recommended dose, making it a complete supplementation option rather than a short-term trial.

Floradix Kids Iron and Vitamin Formula 250 ml

The Floradix Kids Iron and Vitamin Formula 250 ml is specifically formulated for children, delivering a lower and age-appropriate dose of iron alongside B vitamins and vitamin C in a milder, more palatable flavor profile than the adult liquid. Iron deficiency is common in children, particularly fussy eaters, toddlers transitioning from milk-based diets, and children following vegetarian or vegan diets. The liquid format makes dose adjustment straightforward as children grow, and the absence of artificial preservatives, colorings, and lactose makes it suitable for a wide range of dietary requirements. Always consult a pharmacist or GP regarding appropriate dosing for a child's age and weight before starting supplementation.

The Feroglobin Range: Products Explained

Feroglobin is produced by Vitabiotics, one of the UK's most established supplement brands. The range is distinguished by its focus on combining ferrous gluconate with cofactors that support not just iron absorption but the full process of iron utilization and red blood cell synthesis, including copper, which is required for the mobilization of stored iron into circulation via the enzyme ceruloplasmin.

Feroglobin B12 Plus Liquid 200 ml

The Feroglobin B12 Plus Liquid 200 ml is the brand's flagship iron supplement, providing 14 mg of elemental iron per 20 ml serving from ferrous gluconate alongside vitamin B12, folic acid, vitamin C, and copper. The higher elemental iron dose compared to Floradix's liquid makes it a particularly relevant choice for individuals with a higher iron requirement, including those with confirmed mild deficiency or those with heavy menstrual periods. The 200ml bottle provides a 10-day supply at the standard dose, making it well suited to short-course use or as a first purchase before committing to a larger supply. The milder taste compared to Floradix is frequently cited as an advantage by users who find herbal-flavored iron supplements difficult to take consistently.

Feroglobin B12 Capsules 30

The Feroglobin B12 Capsules 30 deliver iron and B12 in a dry capsule format that suits those who prefer a non-liquid supplement or who need a portable option for supplementation during travel or at work. The capsule format contains ferrous gluconate, vitamin B12, and supporting micronutrients in a formulation that avoids the taste and texture considerations associated with liquid iron entirely. A pack of 30 capsules provides a one-month supply at the standard dose of one capsule daily, making it a convenient monthly purchase for those on a maintenance supplementation regime. The capsule format also tends to be better tolerated digestively for some individuals compared to liquid iron, though both liquid and capsule Feroglobin formulations use the same gentler ferrous gluconate base.

Vitabiotics Feroglobin Plus Liquid 200 ml

The Vitabiotics Feroglobin Plus Liquid 200 ml is an enhanced formulation within the Feroglobin range, providing iron alongside an extended micronutrient profile that includes zinc and a broader B vitamin complex in addition to the B12, folic acid, and copper found in the standard B12 Plus Liquid. Zinc is a cofactor for numerous enzymes involved in cellular metabolism and immune function, and its inclusion makes Feroglobin Plus particularly relevant for individuals whose fatigue and low energy may have multiple nutritional contributors rather than iron deficiency alone. It is produced by Vitabiotics under pharmaceutical-grade manufacturing standards and is suitable for adults, including those who are pregnant or breastfeeding, though confirmation with a healthcare professional is always advisable in these circumstances.

Key Differences at a Glance

Iron Dose

Feroglobin provides a higher elemental iron dose per serving (14 mg in the B12 Plus Liquid vs. approximately 7.5 mg in Floradix liquid). For individuals with confirmed mild deficiency, this higher dose may support faster repletion, though therapeutic anemia management should always involve a healthcare professional.

Cofactor Profile

Floradix emphasizes a broader B vitamin spectrum, including B1, B2, and B6 alongside B12. Feroglobin focuses on B12, folic acid, copper, and, in the Plus Liquid, zinc. The copper content of Feroglobin is a clinically meaningful differentiator, as copper deficiency can cause functional iron deficiency that does not respond to iron supplementation alone.

Format Choice

Both brands offer liquid and non-liquid formats. Floradix covers liquids in 250 ml and 500 ml sizes, tablets, and a dedicated children's formula. Feroglobin covers a 200 ml liquid in two formulations and a 30-capsule option. The breadth of Floradix's format range gives it a practical advantage for households with varying needs, particularly those with children.

Taste

Floradix has a distinctive sweet, herbal-fruity flavor from its fruit juice and plant extract base. Feroglobin's liquid is noticeably milder. Taste is a genuinely practical consideration for consistent daily supplementation, and for those who find the Floradix flavor challenging, the tablet or the Feroglobin liquid formats are sensible alternatives.

Browse both ranges alongside our full vitamins and supplements section. For energy-related supplementation options, visit our energy and wellbeing supplements page.

Frequently Asked Questions

What is the difference between Floradix 250 ml and 500 ml?

The Floradix Formula Iron Extract 250 ml and the Floradix Liquid Iron Formula 500 ml contain the same formula at the same concentration. The 250 ml is a practical starting size for first-time users or occasional supplementers. The 500 ml is the better-value option for regular daily use and comes with a pump measure for convenient dosing. Both should be refrigerated after opening and used within the stated period once open.

Which is better for children: Floradix Kids Formula or adult Floradix?

The Floradix Kids Iron and Vitamin Formula 250 ml is specifically formulated for children with an age-appropriate iron dose and a milder, more child-friendly flavor. The adult Floradix liquid provides a higher iron dose intended for adult requirements and is not appropriate for children without professional guidance on dose adjustment. For children with confirmed or suspected iron deficiency, the Kids Formula is the appropriate choice, alongside advice from a GP or pharmacist on suitability and dosing for the child's specific age and weight.

I've been told I'm borderline anemic. Should I use Floradix or Feroglobin, or do I need a prescription supplement?

For borderline or mild iron deficiency, both Floradix and Feroglobin are appropriate over-the-counter options. Feroglobin B12 Plus Liquid provides a higher elemental iron dose per serving, which may be preferable for confirmed mild deficiency. If your GP has confirmed iron deficiency anemia through blood tests, a prescription supplement with a higher elemental iron dose may be more appropriate initially to rebuild stores more quickly. Your pharmacist can help you interpret your blood results and choose the most suitable product.

Can iron supplements affect medication absorption?

Yes, and this is clinically important. Iron supplements can significantly reduce the absorption of certain medications, including levothyroxine (thyroid hormone), bisphosphonates, quinolone antibiotics, and levodopa. These medications should typically be taken at least two hours before or four hours after an iron supplement. This applies equally to Floradix liquid, Floradix tablets, Feroglobin liquid, and Feroglobin capsules. If you are on regular medication, always check for interactions with your pharmacist before starting any iron supplement.

How long does it take for iron supplements to work?

Hemoglobin levels in iron deficiency anemia typically begin to rise within two to four weeks of starting appropriate supplementation. However, replenishing iron stores (reflected in ferritin levels) takes considerably longer, usually three to six months of continued supplementation after hemoglobin normalizes. Stopping supplementation as soon as symptoms improve is a common mistake that leads to rapid relapse. This applies whether you are using Floradix, Feroglobin B12 Capsules, or any other ferrous gluconate-based supplement.