⚡ One Capsule. Everything Your Body Actually Uses.
Most men are paying for vitamins their body can’t absorb. One A Day is different: chelated minerals your body recognises, active B-vitamins it can use immediately, and 11 UK-authorised health claims covering testosterone, energy, cognitive function, immunity and more — all in a single vegan capsule[1][2]. No iron you don’t need. No 6-pill stacks. No subscriptions. 60p a day. Sorted.
Jump to: What It Does | Who It’s For | vs Competitors | Timeline | FAQ
Supplements are foods, not medicines — they support normal health alongside a balanced lifestyle, not to diagnose, treat, prevent, or cure any medical condition.
How we evaluate: Mineral form quality, dose vs NRV, authorised health claims, and male-specific design. Sources listed in references.
See It in 28 Seconds
Who it’s for, why it’s different, and how one capsule covers your foundation.
Your Current Multivitamin Is Probably a Waste of Money
Here’s what nobody tells you: most high-street multivitamins use magnesium oxide and zinc oxide — mineral forms with lower bioavailability in many contexts[1][3]. That means a significant portion of what you swallow passes straight through. You’re paying for something your body can’t fully use.
It gets worse. Most generic formulas include iron — which most men already get enough of from diet. The NHS notes excessive iron intake can be harmful for men[4]. And they focus narrowly on “energy” while ignoring mental performance, cognitive function, and the nutrients men specifically need.
A typical budget multivitamin qualifies for 2–5 authorised health claims. MenTools One A Day qualifies for 11[2]. Same daily cost range. Different daily result.
The bottom line: If your multivitamin uses oxide minerals, synthetic B-vitamins and includes iron you don’t need — you’re not supplementing. You’re just spending. MenTools One A Day uses chelated bisglycinate minerals, active B-vitamin forms and 11 UK-authorised health claims in one capsule, at 60p a day.
What’s Inside — And What It Means for You
Every ingredient in One A Day was chosen for a reason. Chelated magnesium, zinc and copper as bisglycinate — bound to amino acids so your body absorbs them, unlike the cheap oxides most brands hide behind[1]. Active B-vitamins (methylcobalamin, P-5-P, 5-MTHF) that are ready to use with no conversion required. Vitamin D3 at 500% NRV from vegan lichen, paired with K2 MK-7 — the partner most multivitamins leave out entirely. No iron, no filler, no proprietary blends.
▶ 11 UK-authorised health claims covering energy, brain function, testosterone, immunity, bones, fertility and more — all from one capsule
▶ 100% vegan — HPMC capsule, no gelatin, no dairy, no soy, free from all UK 14 allergens[5]
▶ Every dose listed below — no hidden numbers, no guesswork
Full ingredient table with exact doses and NRV percentages below ↓
🔍 For the detail-oriented
Minerals — Chelated, Not Cheap Oxides
| Nutrient | Form | Dose | NRV% |
|---|---|---|---|
| Magnesium | Bisglycinate chelate | 100 mg | 27% |
| Zinc | Bisglycinate chelate | 10 mg | 100% |
| Copper | Bisglycinate chelate | 1 mg | 100% |
| Iodine | Potassium iodide | 150 µg | 100% |
| Selenium | L-selenomethionine | 55 µg | 100% |
Vitamins — Active Forms, Not Synthetic
| Nutrient | Form | Dose | NRV% |
|---|---|---|---|
| Vitamin D3 | Cholecalciferol (vegan, from lichen) | 25 µg / 1,000 IU | 500% |
| Vitamin K2 | MK-7 (all-trans) | 75 µg | 100% |
| Vitamin E | Natural d-α-tocopherol | 12 mg α-TE | 100% |
| Vitamin C | Ascorbic acid | 80 mg | 100% |
| Pantothenic acid (B5) | Calcium pantothenate | 10 mg | 167% |
| Vitamin B6 | P-5-P | 2 mg | 143% |
| Vitamin B12 | Methylcobalamin | 25 µg | 1,000% |
| Folate | 5-MTHF (Quatrefolic®) | 200 µg | 100% |
| Thiamine (B1) | Thiamine mononitrate | 1.2 mg | 109% |
| Riboflavin (B2) | Riboflavin | 1.4 mg | 100% |
| Niacin (B3) | Nicotinamide | 16 mg NE | 100% |
| Biotin (B7) | Biotin | 50 µg | 100% |
| Beta-carotene | Provitamin A | 1,000 µg eq | — |
Capsule: HPMC vegan (no titanium dioxide). Other: MCC, colloidal silica, vegetable magnesium stearate[5].
11 Things This Capsule Does for Your Body
Every single one authorised under the UK GB Register[6]. Attributed to the specific nutrient, not the product.
1
Mental Performance
Stay sharp when it matters.
“Pantothenic acid contributes to normal mental performance.”
2
Fatigue Reduction
Kill the 3pm crash.
“Vitamins B2, B3, B6, B12, vitamin C and magnesium contribute to the reduction of tiredness and fatigue.”
3
Testosterone Maintenance
Support what makes you, you.
“Zinc contributes to the maintenance of normal testosterone levels.”
4
Cognitive Function
Think clearer under pressure.
“Zinc and iodine contribute to normal cognitive function.”
5
Psychological Function
Keep your head right.
“Magnesium contributes to normal psychological function.”
6
Immune Function
Don’t let illness slow you down.
“Vitamin D, vitamin C, selenium and zinc contribute to the normal function of the immune system.”
7
Bone Health
Built to last.
“Vitamin D and vitamin K contribute to the maintenance of normal bones.”
8
Muscle Function
Train harder, recover smarter.
“Vitamin D contributes to normal muscle function.”
9
Male Fertility
Plan ahead with confidence.
“Selenium contributes to normal spermatogenesis.”
10
Antioxidant Protection
Defend at the cellular level.
“Vitamin C, vitamin E and selenium contribute to the protection of cells from oxidative stress.”
11
Hair & Skin
Look the part.
“Biotin contributes to the maintenance of normal hair and skin.”
Side by Side. Same Price Range. Different Formula.
Here’s what it looks like when you put One A Day next to what most men are currently taking:
| Feature | Budget Brands | Centrum Men | Wellman | MenTools One A Day |
|---|---|---|---|---|
| Mineral Forms | Oxides | Oxides | Oxides | Bisglycinate chelates |
| B-Vitamin Forms | Synthetic | Synthetic | Synthetic | Active (methylcobalamin, P-5-P, 5-MTHF) |
| Vitamin D3 | 10–15 µg | 10–15 µg | 10–15 µg | 25 µg (500% NRV) |
| K2 MK-7 | None | None | None | 75 µg |
| Iron | Often included | Often included | Often included | Iron-free (by design) |
| Authorised Claims | 2–4 | 3–5 | 5–7 | 11 |
| Price/Day | ~30–50p | ~35–50p | ~40–55p | 60p |
Competitor data from publicly available labels, March 2026. “Authorised Claims” per the UK GB Register[6].
Most Multivitamins Focus on price. We Focus on Men.
You know the feeling. It’s 3pm. Your focus drops. Your brain feels like it’s running on fumes. You reach for coffee but it doesn’t fix the problem — it just masks it for 45 minutes.
Six nutrients in this capsule qualify for authorised claims around mental performance, cognitive function, psychological function, and fatigue reduction[6]. That’s not marketing. That’s what men need.
What’s happening inside your body:
- ▶ Pantothenic acid (B5) contributes to normal mental performance — the nutrient behind sustained focus[6]
- ▶ Zinc + Iodine contribute to normal cognitive function — how you process, learn, and make decisions[6]
- ▶ Magnesium contributes to normal psychological function — mood, resilience, mental balance[6]
- ▶ B2, B3, B6, B12, Vitamin C + Magnesium contribute to the reduction of tiredness and fatigue — that’s 6 nutrients working on the same problem[6]
Most multivitamins give you one or two of these. One A Day covers all four authorised brain-related claims in a single capsule.
Engineered for Men 18+ Who Take Action
Different stage. Different priorities. Same daily foundation.
18–24
The Starters
University, first job, late nights, early starts. Your diet is inconsistent — your supplement shouldn’t be. Vitamins B2, B3, B6, B12, vitamin C and magnesium contribute to the reduction of tiredness and fatigue[6]. One capsule with breakfast. Sorted.
25–32
The Builders
Building a career, a business, or both. You don’t have time for a 6-pill stack. Pantothenic acid contributes to normal mental performance[6]. One capsule handles the foundation so you can handle everything else.
What to Expect — A Realistic Timeline
Week 1–2
B-Vitamin Stores Begin Replenishing
Water-soluble B-vitamins replenish relatively quickly with consistent daily intake[2].
Week 3–6
Mineral Status Normalises
Magnesium and zinc stores may begin normalising. Research associates adequate magnesium status with improved stress resilience[1].
Month 2–6
Longer-Term Markers
Studies on zinc supplementation in men with low zinc status have measured changes in testosterone markers after 3–6 months[3].
Results vary between individuals depending on baseline nutrient status, diet and lifestyle.
MenTools One A Day
Engineered for men. Built in the UK. One capsule. Done.
30-day supply — 60p per day. Less than a coffee.
No subscription required. No auto-renewal. Buy once.
What Men Are Saying
Answers: “Does it actually work?”
“Switched from a supermarket brand after reading about oxide vs chelate. Two months in — the afternoon wall has moved. The ingredient list is what sold me.”
— James, 29, Software Developer, London
Answers: “Is it worth the price?”
“60p a day for chelated minerals and active B-vitamins? My last multivitamin was 40p a day with oxide zinc and cyanocobalamin. I’d rather pay the extra 20p and know my body can actually use what I’m taking.”
— Dan, 24, PT, Manchester
Answers: “Can I trust this brand?”
“The fact every dose and ingredient form is listed on the label — no proprietary blends, no hidden numbers — that’s what convinced me. Most brands won’t show you what’s actually inside. MenTools do.”
— Mark, 36, Business Owner, Bristol
Placeholder reviews — replace with verified customer reviews post-launch. Results vary between individuals.
Questions Men Actually Ask
How simple is this — really?
One capsule. With breakfast. With water. That’s it. No timing protocols, no multi-pill stacks.
I’m plant-based — will this work for me?
Yes. HPMC vegan capsule, vitamin D3 from lichen (not lanolin), no animal-derived ingredients[5].
Wait, no iron? Isn’t that bad?
The opposite. Most men get adequate iron from food. The NHS notes excessive iron intake can be harmful for men[4]. Iron-free by design, not by oversight.
I’ve tried multivitamins before and they didn’t do anything.
Many disappointing experiences come from oxide-based formulas. If your previous multivitamin used magnesium oxide, zinc oxide, or cyanocobalamin, your body may not have absorbed much of what you paid for[1][3]. One A Day uses chelated bisglycinate minerals and active B-vitamin forms.
How long before I notice anything?
Individual responses vary. B-vitamins may replenish in weeks 1–2. Magnesium and zinc may normalise over weeks 3–6. A consistent 60-day period is a reasonable evaluation timeframe.
What if it doesn’t work for me?
14-day money-back guarantee. Contact us. Full refund. No hassle. No forms.
Is this a subscription trap?
No. Single purchase. No auto-renewal. No subscription required. Buy once, try it, reorder if you want to.
Can I take this alongside prescription medication?
Speak with your prescribing doctor before adding any supplement. MenTools products are nutritional supplements — not medicines.
Quality, Testing and Transparency
UK-Manufactured
Redrose Manufacturing Ltd (GMP, HACCP, ISO). GB Food Supplement Regulation 2003/4264[5].
Batch-Tested
Microbiology & heavy metals tested per UK GMP and FSA limits. All 11 claims authorised[6].
Full Transparency
Every ingredient, dose and form listed on the label. No proprietary blends. No hidden numbers[5].
30-day supply — 60p per day. Less than a coffee.
Last updated: 2026-03-12 v9.0
Medical Disclaimer: This guide is for informational purposes only and does not constitute medical advice. Always speak with your doctor or another qualified healthcare professional before starting any new supplement or programme if you have medical conditions or take prescription medication.
Supplement Notice: Food supplements should not be used as a substitute for a varied and balanced diet and a healthy lifestyle. Do not exceed the stated recommended daily dose. Keep out of reach of children.
References
- [1] Ates M, et al. Type of Magnesium Salt and Formulation/Solubility Determines Bioavailability. J Nutritional Health & Food Eng. 2019.
- [2] MenTools Ltd. Launch Pack — Brand, Formula, Claims. 2025.
- [3] Wegmüller R, et al. Zinc Absorption by Young Adults. J Nutrition. 2014;144(2):132–136.
- [4] NHS. Iron — Vitamins and Minerals. 2023. nhs.uk.
- [5] Redrose Manufacturing Ltd. Finished Product Constituent Parts. CPROD30395. 2025.
- [6] GB Nutrition and Health Claims Register. FSA. gov.uk.
- [7] Firoz M, Graber M. Bioavailability of US magnesium preparations. Magnesium Res. 2001;14(4):257–262.
