A vitamin B12 food supplement combining three forms of vitamin B12 in one vegetarian capsule a day.
Three forms of vitamin B12
Each capsule provides 1,500µg vitamin B12 (60,000% NRV): 750µg methylcobalamin, 450µg adenosylcobalamin and 300µg cyanocobalamin. 60 capsules per pouch.
Nutrition and health claims
- Vitamin B12 contributes to the reduction of tiredness and fatigue
- Vitamin B12 contributes to normal energy-yielding metabolism
- Vitamin B12 contributes to normal functioning of the nervous system
- Vitamin B12 contributes to normal psychological function
- Vitamin B12 contributes to normal red blood cell formation
- Vitamin B12 contributes to normal homocysteine metabolism
- Vitamin B12 contributes to the normal function of the immune system
- Vitamin B12 has a role in the process of cell division
Who is it for?
Vitamin B12 is found naturally mainly in foods of animal origin, so it is a popular choice for people following a vegetarian diet.
How to take
Take 1 capsule daily with a meal. Do not exceed the recommended daily intake.
Good to know
Suitable for vegans and vegetarians. Made in the UK. Made in a factory that also handles milk, egg, fish and crustaceans. 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 under medical supervision, consult your doctor or pharmacist before use. Keep out of reach of children.
Bronze, Best Individual Vitamin – Wellness from Within Awards 2024
Formulation Comparison
Dr Marks Triple B12 vs Typical High-Street Supplement
60 vegan capsules · 1 a day · 28p/daySuitable for vegans & vegetarians
| What to look for | Dr Marks Triple B12 | Typical High-Street Supplement |
|---|---|---|
| B12 spectrum | Dr MarksAll 3 forms combined (750µg Methylcobalamin + 450µg Adenosylcobalamin + 300µg Cyanocobalamin) |
Typical High-StreetSingle-form cyanocobalamin only |
| Strength & format | Dr MarksHigh-strength 1,500µg total B12 in 1 small vegan capsule |
Typical High-StreetLow-dose 10–100µg compressed tablets |
| Award pedigree | Dr MarksWellness From Within 2024 Bronze Winner (Best Individual Vitamin) |
Typical High-StreetBasic single-form B12 |
| Excipients & coatings | Dr MarksNo titanium dioxide, talc, tablet glazes or artificial colours |
Typical High-StreetBulking agents, tablet glazes and artificial colours |
| Format & packaging | Dr MarksFlat, letterbox-friendly resealable pouch |
Typical High-StreetBulky plastic tubs or blister packs |
| Formulated by | Dr MarksPractising UK GPs |
Typical High-StreetGeneric mass-market contract formulas |
Compared against common single-form or standard A–Z high-street tablet formulations.Made in a UK factory that also handles milk, egg, fish and crustaceans.
A GP’s View on Supplement Timelines
Consistent Daily Use: What Happens in the Body
Many supplement brands print fixed charts promising you will “feel more energy in Week 2” or “see thicker hair in Month 2”. As practising UK GPs, we won’t do that. What happens when you take a supplement depends on whether you are topping up an everyday diet (where nutrients work quietly in the background and you may not “feel” a sudden change) or correcting a low level found on a GP blood test.
Days 1–7
Daily routine & digestive comfort
Take 1 capsule a day with a main meal and water. Taking your capsule with food is gentler on the stomach and helps fat-soluble vitamins absorb normally.
Weeks 2–6
Steady daily nutritional intake
Consistent daily intake helps top up your diet every day rather than in sporadic bursts. Water-soluble nutrients (such as B vitamins and vitamin C) are used daily and aren’t stored in large amounts, while fat-soluble nutrients (such as vitamin D) build up gradually with steady daily intake.
Weeks 8–12 (1–2 pouches)
Long-term maintenance & GP blood re-checks
Red blood cells turn over roughly every 90 to 120 days. When a GP treats a confirmed low level (such as vitamin B12 or vitamin D), NICE and NHS guidance typically schedules a clinical review or follow-up check around 3 months. For everyday dietary top-ups, steady ongoing habits matter most.
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Dr Marc CrutchleyMBChB MRCGP MSc BSc (Hons), Co-founder
Dr Mark WilshereMBChB MRCGP DCH BSc (Hons), Co-founder
GP-Formulated in the UK✓ GMC-Registered Practising UK GPs · 40+ Years Combined Experience
Meet the GPs behind Dr Marks
Formulated by Dr Marc Crutchley and Dr Mark Wilshere, practising UK GPs.
With over 40 years of combined clinical experience as GMC-registered UK GPs, we formulate every Dr Marks supplement using bioavailable nutrient forms at meaningful daily doses — in clean plant-based capsules with zero synthetic fillers or binders.
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