What's Actually in the FabU Range? A Pharmacist's Guide to the Ingredients

The most common question I'm asked across the counter at Chemco Pharmacy is a simple one: "I've seen FabU everywhere — but do these ingredients actually work?" It's a fair question, and you deserve a clear, evidence-based answer rather than marketing jargon. This guide explains exactly what's inside each FabU supplement, what the ingredients do, and — just as importantly — where the science is strongest and where it's still emerging. Written from a pharmacist's point of view, with no overclaiming.

At Chemco Pharmacy, our pharmacist team reviews supplement choices every day for customers who are unsure what suits them best — especially where medicines, pregnancy, cholesterol treatment or multiple supplements are involved.

Below, I go through each ingredient in turn. But if you prefer to scan, here's the whole range side by side:

First, why are there mushrooms in a supplement?

Most of the FabU range is built around what are often called "functional" or "medicinal" mushrooms — chiefly Lion's Mane, with Cordyceps and Chaga appearing in the immune formula. These aren't the mushrooms you'd put in a stir-fry. They're species that have been used in East Asian traditional practice for centuries and have, in the last decade or so, become the subject of genuine scientific interest in the West.

The reason they're interesting to a pharmacist is that they contain specific bioactive compounds — particularly a group of carbohydrates called beta-glucans, plus species-specific molecules — that appear to interact with the body in measurable ways. Beta-glucans, for example, are recognised to interact with immune cells: they bind to receptors (such as Dectin-1) on cells like macrophages and natural killer cells, which is the mechanism most often cited for the "immune support" associated with mushrooms like Chaga.

The honest caveat, which we'll repeat throughout: a lot of the most exciting mushroom research is still preclinical — done in cells or animals rather than large human trials. That doesn't mean it's worthless; it means the sensible position is "promising, supportive, worth including in a healthy lifestyle" rather than "miracle cure." Anyone telling you a mushroom capsule treats a disease is overstating the evidence.

Lion's Mane (Hericium erinaceus) — the hero ingredient

Evidence: Emerging but promising

Lion's Mane is the single most-used active across the FabU range — it appears in Focus Brain, Meno & Peri, R&R Relax, Gut Culture and Andropause for Men. So it's worth understanding properly.

Lion's Mane is a distinctive, shaggy white mushroom that contains two families of compounds of particular interest: hericenones (in the fruiting body) and erinacines (in the mycelium). In laboratory studies these compounds have been shown to stimulate the production of nerve growth factor (NGF) — a protein that supports the growth, maintenance and survival of nerve cells. That NGF mechanism is the scientific rationale behind Lion's Mane being associated with cognition, focus and nervous-system support.

Here's the pharmacist's nuance, because it matters. The NGF-stimulating effect is well-documented in the laboratory. The human clinical trials — looking at whether that translates into measurable improvements in memory, focus or mood in real people — are smaller, shorter, and have produced mixed results. The overall evidence base is best described as early and developing: promising, but not yet definitive.

So how should you think about it? Lion's Mane is a reasonable, well-tolerated ingredient to include if you want daily nutritional support for focus and mental clarity — which is exactly how FabU positions it. It is not a treatment for any cognitive condition, and we'd never present it as one.

Cordyceps & Chaga — the immune and energy mushrooms

Evidence: Mechanism plausible, human data limited

These two appear together in FabU Shrooms Active & Immune, alongside vitamins C and D3, zinc and copper.

Cordyceps is traditionally associated with energy, stamina and endurance. Its signature compound is cordycepin, an adenosine analogue thought to play a role in cellular energy (ATP) pathways — which is the rationale for its "active" positioning. A small number of clinical trials have looked at exercise performance and oxygen utilisation, with modest results; it's an ingredient with a plausible mechanism and a long traditional history rather than a deep clinical evidence base.

Chaga (Inonotus obliquus) is prized mainly as an antioxidant mushroom — it's one of the richest natural sources of certain antioxidant compounds, and it carries the beta-glucans associated with immune-cell activation described above. Again, most of the Chaga evidence is preclinical, so the honest framing is "antioxidant and immune-supporting compounds" rather than specific health outcomes.

Crucially, in this product the permitted, evidence-backed immune claims come from the vitamins and minerals, not the mushrooms — and that's an important distinction we'll come back to. Vitamin C, vitamin D, zinc and copper all have EFSA-authorised claims for contributing to the normal function of the immune system. The mushrooms are the traditional, supportive layer on top of that nutritional foundation.

The gut ingredients: probiotics, prebiotic inulin & postbiotics

Evidence: Strong for inulin's prebiotic effect

FabU Gut Culture is built on a three-part idea: probiotics (live beneficial bacteria), prebiotics (fibre that feeds them) and postbiotics (beneficial compounds bacteria produce). The standout ingredient here, from an evidence point of view, is the prebiotic: chicory root inulin.

This is one of the better-evidenced ingredients in the entire FabU range. A 2022 systematic review and meta-analysis pooling 50 randomised controlled trials (nearly 2,500 participants across all age groups) confirmed that chicory-derived inulin-type fructans selectively increase Bifidobacteria — beneficial gut bacteria — from intakes of around 3g per day, and improve bowel regularity. That's a robust level of evidence, and it's why inulin carries recognised digestive-health support behind it.

The "probiotic" and "postbiotic" elements add to the formula, and Lion's Mane is included here too, tying into the much-discussed "gut–brain axis." It's a sensible, broad daily gut-wellbeing supplement.

The vitamins & minerals doing the heavy lifting

Evidence: Strong — EFSA-authorised claims

Here's something a lot of people miss about supplements like these. While the mushrooms get the attention on the label, much of the legally permitted, scientifically substantiated benefit comes from the vitamins and minerals — because these have official EFSA-authorised health claims behind them. These are the claims a pharmacist can stand over without hesitation:

• Magnesium — contributes to normal muscle function, normal nervous system function, normal energy-yielding metabolism, and the reduction of tiredness and fatigue. (In Meno & Peri, R&R Relax and Andropause.)
• Vitamin B6 — contributes to normal psychological function, the regulation of hormonal activity, and the reduction of tiredness and fatigue.
• Vitamin B12 — contributes to normal neurological and psychological function and normal energy metabolism — which is why it's central to the focus and energy formulas.
• Vitamin D3 — contributes to the maintenance of normal bones and muscle function, and to normal immune function.
• Vitamin K2 — contributes to the maintenance of normal bones (it works alongside D3 — a sensible pairing in Meno & Peri and Joint & Bone).
• Chromium — contributes to the maintenance of normal blood glucose levels.
• Zinc — contributes to the maintenance of normal testosterone levels in the blood (the basis for its inclusion in Andropause for Men), plus normal immune function.
• Copper & Vitamin C — both contribute to normal immune function (in Active & Immune).

This is the part of the formula with the firmest scientific footing. When we say a FabU product "supports energy" or "supports bone health," it's these nutrients — with their authorised claims — that justify the statement. The mushrooms are the traditional, complementary layer.

Skin, Hair & Nails Glow — a collagen-building amino acid complex

Evidence: Sound nutritional rationale

The FabU Skin Hair Nails Glow formula deserves a closer look, because its ingredient story is more interesting than a typical "beauty multivitamin." The hero here isn't a single vitamin — it's a collagen-building amino acid complex paired with Reishi mushroom.

Collagen is the structural protein that gives skin its firmness, hair its strength and nails their resilience. Your body builds collagen from specific amino acids arranged in a triple-helix structure — and the formula supplies exactly those building blocks. Per two-capsule serving it provides L-proline, glycine and L-hydroxyproline (the three amino acids most central to the collagen molecule), plus L-lysine and L-leucine, at 160mg each. Rather than giving you pre-formed collagen, this approach supplies the raw materials your own body uses to make it.

Around that sits Reishi mushroom (Ganoderma lucidum) — a 300mg fruiting-body extract — which contributes the antioxidant, triterpene and polysaccharide compounds the functional-mushroom section above describes. And then the supporting cast of vitamins and minerals, each carrying its own authorised EFSA claim relevant to skin, hair and nails:

• Zinc — contributes to the maintenance of normal skin, hair and nails, and to normal protein synthesis (the single most relevant mineral for this product).
• Vitamin A — has a role in the process of cell specialisation and contributes to the maintenance of normal skin.
• Vitamin B3 (niacin) — contributes to the maintenance of normal skin and mucous membranes.
• Vitamin C — contributes to normal collagen formation for the normal function of skin, and helps protect cells from oxidative stress.
• Vitamin E — contributes to the protection of cells from oxidative stress.
• Vitamin D3 — contributes to normal cell division.

It's a genuinely well-thought-out formula: the amino acids supply the collagen raw materials, vitamin C supports their assembly into collagen, zinc underpins skin/hair/nail maintenance, and the antioxidant vitamins protect the cells while they do it. A pharmacist's honest note on expectations: skin, hair and nails renew on their own biological timetable, so consistency matters — most people are advised to allow a few weeks for nails, around five to six weeks for skin, and up to three months for hair before judging the benefit. Take two capsules daily; suitable from 16 years up.

Joint, Bone & Muscle — an 11-ingredient mobility formula

Evidence: Sound, well-rounded formulation

The FabU Joint, Bone & Muscle supplement is the most ingredient-dense product in the range — 11 actives working across three areas: the joint and cartilage tissue, the surrounding connective tissue and muscle, and the bones. Conor Mahon MPSI, our musculoskeletal pharmacist, recommends it as a daily baseline for active adults.

The joint-targeting compounds are the familiar ones a pharmacist sees most: glucosamine (500mg), a natural building block of cartilage; MSM (400mg), a source of sulphur for connective tissue; and hyaluronic acid (20mg), which is naturally concentrated in joint fluid where it lubricates and cushions. These are joined by three botanicals — Reishi mushroom, turmeric (95% curcuminoids) and Boswellia serrata — included for their antioxidant plant compounds.

Then comes the part with the firmest evidence: the vitamins and minerals, each with an authorised claim. Vitamin C contributes to normal collagen formation for cartilage and bone; magnesium to muscle function and bone maintenance; manganese to connective tissue formation; and vitamins D3 and K2 to the maintenance of normal bones. A genuinely well-rounded "move better" formula. One pharmacist's note: the glucosamine here is shellfish-free, which suits the many people who want it but can't take the standard shellfish-derived form.

Cholesterol & Heart — plant sterols, the evidence-backed choice

Evidence: Strong — EFSA-authorised

The FabU Cholesterol & Heart formula is, from an evidence point of view, one of the most soundly-built products in the range — because its hero ingredient is plant sterols, which carry one of the few genuinely strong, EFSA-authorised cholesterol claims available to a food supplement.

Plant sterols (also called phytosterols) are naturally occurring compounds found in plants that are structurally similar to cholesterol. Because of that similarity, they compete with cholesterol for absorption in the small intestine — helping reduce cholesterol absorption in the gut. The evidence here is robust: plant sterols are recognised to help maintain normal blood cholesterol, with the beneficial effect obtained at a daily intake of 1.5–3g. Each three-tablet serving of this product provides a full 1.5g dose, so it's properly dosed rather than a token amount.

Alongside the sterols sit Shiitake mushroom (Lentinula edodes) — a functional mushroom rich in beta-glucans and antioxidants — and two B vitamins: Vitamin B1 (thiamine), which contributes to the normal function of the heart, and Vitamin B2 (riboflavin), which supports normal red blood cells and helps reduce tiredness and fatigue.

A note on accuracy: some older listings described this product as containing "red yeast rice and CoQ10." The current FabU formula is built on plant sterols, Shiitake and B vitamins instead — which is actually a more reassuring formulation from a pharmacist's perspective, since plant sterols carry a clean, authorised cholesterol claim without the regulatory and statin-interaction complexities that surround red yeast rice.

The full FabU range — ingredient by ingredient

Here's a quick pharmacist's reference to what's in each product and the main ingredient story behind it:

Frequently asked questions

Can I take more than one FabU supplement at once?

In many cases, yes — many customers combine, for example, Meno & Peri with R&R Relax. The one thing to watch is overlapping ingredients: several products contain Lion's Mane, and a few share magnesium or zinc. These amounts are generally well tolerated, but if you're stacking two or three products it's worth having a pharmacist check the combined totals so you don't exceed recommended daily intakes of any single nutrient.

How long should I take a FabU supplement before judging whether it works?

As a rule of thumb, allow 8–12 weeks of consistent daily use. Some effects show sooner — digestive support from Gut Culture, or nail changes from Skin Glow, are often noticed within a few weeks — while skin and especially hair changes follow the body's natural renewal cycles and take around three months.

Are FabU supplements suitable during pregnancy or breastfeeding?

Several are not recommended during pregnancy or breastfeeding unless advised by a healthcare professional, and this varies by product. If you're pregnant, planning a pregnancy, or breastfeeding, check with your GP or pharmacist before starting any supplement — we can point you to what's appropriate.

Can I take FabU supplements alongside my medication?

Some ingredients can interact with prescription medicines — the clearest example is the Cholesterol & Heart plant sterols if you also take cholesterol medication. If you take any regular medication, ask a Chemco pharmacist to review it against the supplement before you start. It's a quick check and exactly what we're here for.

Are FabU supplements vegetarian or vegan?

This varies by product — for example, the Joint, Bone & Muscle glucosamine is shellfish-free and the capsule shells across the range are plant-based, but always check the individual product page or ask our team if a specific dietary requirement matters to you. Note too that the range is manufactured in a facility that also handles nuts, soy and fish.

The pharmacist's bottom line

The FabU range is a thoughtfully-built set of supplements that pairs traditional functional-mushroom ingredients with vitamins and minerals that carry genuine, authorised health claims. Our honest summary:

• The vitamins and minerals (magnesium, the B vitamins, D3, K2, zinc, chromium) are the firmly-evidenced backbone of every formula.
• Chicory inulin in Gut Culture is one of the best-evidenced ingredients in the range.
• Lion's Mane, Cordyceps and Chaga are promising, well-tolerated, traditionally-used ingredients with a developing — not yet definitive — clinical evidence base. Include them with realistic expectations.
• Plant sterols in the Cholesterol & Heart formula carry one of the strongest authorised cholesterol claims available to a supplement — properly dosed at 1.5g. Tell your doctor if you also take cholesterol medication.

At Chemco Pharmacy, we believe supplements should complement a healthy lifestyle rather than replace one. The FabU range pairs vitamins and minerals that carry established health claims with promising functional-mushroom ingredients — and the key is choosing the product that best matches your goals, then giving it enough time to work. If you're unsure where to start, our pharmacist team is always happy to help.

Browse the full FabU range →

This article is for general information and is not a substitute for individual medical or pharmacist advice. FabU products are food supplements and are not intended to diagnose, treat, cure or prevent any disease. Food supplements should not be used as a substitute for a varied and balanced diet and a healthy lifestyle. If you are pregnant, breastfeeding, taking medication or have a medical condition, consult your GP or pharmacist before starting any supplement. Ingredient information reflects the FabU formulations and EU regulatory positions current at the time of writing (June 2026) and may change. Written and reviewed by James Cloney MPSI, Pharmacist at Chemco Pharmacy.