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Three Dr Marks supplements: Triple Magnesium, Vitamin B Complex and Vitamin D3 + K2, together for less. Magnesium, riboflavin, niacin, pantothenic acid, vitamin B6, vitamin B12 and folate contribute to the reduction of tiredness and fatigue.
What's in the bundle
- Triple Magnesium Complex: 96mg magnesium per capsule (26% NRV); 2 capsules 192mg (51% NRV), from magnesium citrate, glycinate and malate. Vegetarian capsule.
- Vitamin B Complex: all eight B vitamins, including B6 as P5P 8mg (571% NRV), folate as 5-MTHF and B12 as methylcobalamin, plus choline and inositol.
- Vitamin D3 4,000 IU + K2: vitamin D3 100µg (4,000 IU) with vitamin K2 (MK-7) 100µg per capsule.
Key benefits
- Magnesium contributes to a reduction of tiredness and fatigue, normal energy-yielding metabolism and normal muscle function.
- Vitamins B2, B3, B5, B6 and B12 contribute to the reduction of tiredness and fatigue.
- Vitamins B1, B2, B3, B6, B12 and biotin contribute to normal energy-yielding metabolism; B1, B3, B6, B12 and biotin contribute to normal psychological function.
- Vitamin D contributes to the normal function of the immune system and the maintenance of normal bones and muscle function.
- Vitamin K contributes to the maintenance of normal bones.
Why Dr Marks?
Formulated by practising UK GPs, using active forms where it matters, formulated within UK EVM and European guidance levels when used as directed, and bundled so you can save compared with buying each product separately.
Directions
- Triple Magnesium Complex: One or two capsules daily with water.
- Vitamin B Complex: One capsule daily with food and water.
- Vitamin D3 4,000 IU + K2: One capsule daily with food.
Do not exceed the recommended dose of any product. All in plant-based capsules (suitable for vegetarians).
Cautions & interactions
- Do not take alongside other vitamin D supplements or multivitamins containing vitamin D. 100µg (4,000 IU) is the maximum daily amount of vitamin D for adults.
- Contains vitamin K. If you take anticoagulant medicine such as warfarin, speak to your GP or pharmacist before taking these products.
- Check with your GP or pharmacist first if you take anticoagulants such as warfarin or other medicines, or are pregnant or breastfeeding.
- If you take levothyroxine, bisphosphonates, or tetracycline/quinolone antibiotics, leave 2 to 4 hours between doses.
- Check with your GP or pharmacist if you take thiazide diuretics, digoxin, or have kidney disease.
- Vitamin B Complex contains biotin (200µg), which can interfere with some laboratory blood tests (such as thyroid hormone tests) — tell your doctor or clinic you take this supplement before having a blood test, and check with your GP or pharmacist if you take anticonvulsant medication or levodopa.
- Persistent tiredness has many causes, so see your GP if it does not improve.
Food supplements should not be used as a substitute for a varied and balanced diet and a healthy lifestyle. Keep out of reach of children.
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.
Not sure which one you need? Take the free 60-Second GP Nutrient Check
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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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