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The Layer Add Metformin bottle, blue label, 60 capsules
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Concerns · Metformin

Layer Add Metformin

Reference MT01

1,000 µg of vitamin B12 as methylcobalamin, every day.

4,7 358 reviews

36,90 €

That's €1.23 per day · 60 capsules, 30 days

1 box36,90 € 2 boxes33,90 € 3 and +29,90 €

Price per box. The count is based on the cart total, all references combined.

  • Shipped within 24 business hours from France
  • Shipping €4.90, free from two boxes
  • Made in France · plant-based capsule
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A blood glucose meter on a light table

1,000 µg of vitamin B12, every day of the month.

What's in the box

White and pink capsules, macro photography

01

A thousand micrograms, not two

1,000 µg of vitamin B12 per capsule, as methylcobalamin. Most off-the-shelf multivitamins stop at 2.5 µg, a general-coverage dose that has nothing to do with what you're taking here. We aimed high, on purpose.

A blood glucose meter and a test strip

02

Three nutrients, a single action

B12 as methylcobalamin, folate as 5-MTHF, thiamine as hydrochloride: three nutrients combined in a single capsule. Vitamin B12 supports your energy metabolism and the normal functioning of your nervous system, with nothing for you to add up.

A weekly pill organiser being filled

03

It slips into an already full routine

You already have a tablet morning and evening, a meter, appointments. The capsule is taken at a meal, at the same time as the rest. Nothing to shift, nothing to space out, nothing to watch.

Composition

What one capsule contains

SubstanceForm used Quantity% NRV
Vitamin B12Methylcobalamin1,000 µg40 000 %
Folate5-MTHF glucosamine salt100 µg50 %
ThiamineThiamine hydrochloride50 mg4 545 %

NRV: the reference intake for an adult over one day. n.e.: not established.

Capsule shell: hydroxypropyl methylcellulose of plant origin. Nothing else. No titanium dioxide, no colouring, no flavouring.

White and pink capsules, macro photography
A glass of water filled at the kitchen tap

Directions for use

One capsule a day, with a meal

  1. 1 capsule, with a glass of water, during a meal.
  2. Every day. In case of increased need for vitamin B12.
  3. 60 capsules per bottle, i.e. thirty full days.

No timing gap to observe with your treatment, unless stated otherwise below. Store away from heat and moisture.

  • Do not change your treatment without medical advice.
  • A blood test for vitamin B12 is a matter for your doctor.

Do not exceed the stated daily dose. Does not replace a varied and balanced diet or a healthy lifestyle. Keep out of the reach of young children.

Customer reviews

4.7 out of 5, 358 reviews

Portrait of Christine

Christine

18 June 2026 · Verified purchase

Type 2 diabetes for nine years, metformin morning and evening from day one. I ordered after talking to my GP, who looked at the formula and found nothing to object to. Second box.

Layer Add Metformin

Portrait of Alain

Alain

1 June 2026 · Verified purchase

The B12 dose really is the one advertised, methylcobalamin form, it's written on the bottle and not only on the site. I compared with three brands, none goes as far at this price.

Layer Add Metformin

Portrait of Sylvie

Sylvie

22 May 2026 · Verified purchase

Good product, fast delivery. I give four stars because I would have liked a three-month size as standard rather than having to order three separate boxes.

Layer Add Metformin

Portrait of Rachid

Rachid

6 May 2026 · Verified purchase

I switched to the subscription after the second box. Ten percent off, free shipping, and I don't think about it anymore. It's exactly what I wanted.

Layer Add Metformin

Frequently asked questions

What people ask us about this reference

Why such a high dose?

Methylcobalamin is only very partially absorbed orally beyond a few micrograms. High doses are the norm for this form: you're compensating for a low yield, not a need for 1,000 µg.

Methylcobalamin or cyanocobalamin?

We chose methylcobalamin, the active form, without the cyanide radical of cyanocobalamin. It costs more by the tonne. It's on the label, spelled out in full.

Can I take it with my metformin?

Yes, during the same meal. No delay to observe between the two.

Should I have my B12 levels tested?

That's a decision for your doctor. Talk to them about the box at your next appointment, and they'll tell you whether a test is worthwhile in your situation.

And if I take a fixed combination?

Metformin-based combinations, with a gliptin, a gliflozin or a sulfonylurea, fall within the same scope. The product doesn't change.

The rest of the range

Another treatment at home?

The discount counts boxes, not references. Two different references already means €33.90 each.

Concerns · Statins

Reference ST01

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50 mg of Kaneka QH™ ubiquinol per day, on top of your statin.

4,8 412 reviews

Ubiquinol 50 mg · Riboflavin 4.2 mg

36,90 € · 30 days

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Concerns · Proton pump inhibitors

Reference IP01

Layer Add PPI

B12, vitamin C, D3 and magnesium bisglycinate, four nutrients in one capsule.

4,6 296 reviews

B12 500 µg · Vitamin C 180 mg · D3 20 µg · Magnesium 100 mg

36,90 € · 30 days

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Concerns · Oral contraception

Reference CO01

Layer Add Contraception

B6, folate, B2, B12, the complete B group, one capsule a day.

4,8 507 reviews

B6 10 mg · Folate 250 µg · B2 4.2 mg · B12 50 µg

36,90 € · 30 days

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Concerns · Beta-blockers

Reference BB01

Layer Add Beta-Blockers

1 mg of melatonin for the evening, magnesium and B6 for the day.

4,7 214 reviews

Melatonin 1 mg · Magnesium 100 mg · B6 1.4 mg

36,90 € · 30 days

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Volume pricing

Three boxes, €29.90 each

The count is based on the total number of boxes in the cart, all references combined. Two different boxes count as two boxes. Three different references place you at the three-box price.

The subscription takes off another 10% and includes free shipping from two boxes. No commitment: postponable, skippable, cancellable in two clicks.

Unit price by number of boxes
BoxesSingle unit With subscriptionShipping
136,90 €33,21 €4,90 €
233,90 €30,51 €Free
3 and more29,90 € 26,91 €Free