Pharmaceutical Grade

High-dose inositol in the form of biologically active myo-inositol: an ideal form with optimal bioavailability. Premium, ultra-pure raw material. 500mg myo-inositol per capsule. Vegan, no additives. 120 capsules
  • High-dose myo-inositol: 500mg per capsule
  • Premium, ultra-pure raw material
  • Most common form of inositol in the body
  • Formerly known as vitamin B8, now classified as a conditionally essential nutrient (vitaminoid)
  • Endogenous compound involved in many metabolic processes
120 capsules

Delivery : 1–3 business days

Incl. VAT, excl. Shipping

€111.42 / 1kg
In stock

Premium Bioactive Ingredients

  • Inositol in the form of biologically active myo-inositol (formerly vitamin B8)
  • Most important form of inositol, involved in many metabolic processes
  • Ideal form with optimal availability
  • Premium vegan raw material
  • High-dose: 500mg myo-inositol per capsule

How are we different?

Inositol occurs in nine different forms, or isomers, which differ in their geometric structure and perform similar, yet different functions. The most important (and most common) form is myo-inositol. Our myo-inositol consists of an ultra-pure, premium vegan raw material.

For the capsule shells we use custom-made HPMC capsules that, unlike most other HPMC and pullulan capsules on the market, are 100% free from controversial additives such as carrageenans and PEG. We then package this product in environmentally friendly amber glass.


  • Premium active ingredients in their purest form
  • Sourced directly from the world’s best producers
  • Our select raw materials are the basis of all our formulations
  • Complete avoidance of all unnecessary additives and adjuvants
  • Exclusive use of valuable natural ingredients for additives
  • We voluntarily declare all ingredients
  • All extractions performed without the use of chemical solvents
  • Custom production when necessary, in order to achieve the highest possible level of purity
  • Independent laboratory testing available on product pages
  • Raw materials sourced only from premium suppliers who are committed to fair working conditions
  • Amber glass and compostable pouches used for packaging
  • Vegan capsule shells, free from PEG and carrageenans
  • Packaged in the EU according to HACCP, GMP and ISO 22000:2018 standards
  • Stored in non-toxic containers
  • Shipped in mineral oil-free boxes
  • All products guaranteed 100% free from magnesium stearate, silicon dioxide, nanoparticles (no legal opportunism), genetic engineering, artificial colours and flavours, titanium dioxide and added sugar & sweeteners



Inositol is a vitamin-like compound that was previously known as vitamin B8 until it was discovered that the human body can produce it from glucose. Though this means that inositol is no longer considered a vitamin, it is still vital for important functions in the body.

Inositol exists in the form of 9 different isomers. All inositol compounds differ only in the spatial arrangement of their atoms. The two best-known inositol forms are myo-inositol and D-chiro-inositol.


Recommended Dosage

Take 1 capsule (500mg myo-inositol) daily with 200ml water.

Daily Requirements

There are no official dietary guidelines for inositol. This compound can be synthesised by the body itself, so many people can completely cover their daily requirements endogenously. The following recommendation for dietary supplementation is stated in the literature:

Inositol: 2,000mg

Food Supplement

Do not exceed the recommended dose. Food supplements cannot replace a balanced and varied diet. Keep out of reach of children.


Store in a cool, dry place away from direct sunlight and heat.


Ingredients: Myo-Inositol.
Capsule shells: Hydroxypropyl Methylcellulose.
Contains: 120 capsules

Ingredients/Capsule % NRV*
Myo-Inositol 500mg --

* Nutrient Reference Value

Per capsule: 500mg myo-inositol
In total: 60g myo-inositol/jar


In addition to the eight essential B vitamins (B1, B2, B3, B5, B6, B7, B9, B12), there are vitamin-like compounds, or vitaminoids, that work closely with the B vitamins as cofactors and were therefore counted as B vitamins themselves until recently. In ideal conditions, these cofactors can be produced by the body itself. Particularly when taking high doses of B vitamins, it is important to ensure a parallel supply of these compounds to avoid nutritional imbalances:

  • Choline (formerly vitamin B4) is mainly found in the form of phosphatidylcholine (lecithin) and acetylcholine.
  • Betaine (in the form of trimethylglycine/TMG) is another activated form of choline which plays an important role in the methylation cycle as well as in homocysteine metabolism.
  • Inositol (formerly vitamin B8) is found primarily in the brain, liver and kidneys.
  • PABA (formerly vitamin B10) functions as a coenzyme and is involved in the formation of red blood cells via vitamin B9.

Product Details

German Pharmaceutical Number (PZN) 15423060
Production In-house production in Europe, bottling and encapsulation in the EU according to HACCP, GMP/ISO 22000:2018 standards
Finished products packaged in amber glass jars and stored in non-toxic containers
Shipping in mineral oil-free boxes
Capsules Plant-based cellulose (HPMC). Vegan
Premium HPMC quality: Free from controversial additives such as carrageenans and PEG
Packaging Amber glass jar to protect against light and oxidation (free from plasticisers and BPA)
To Reuse Remove product label by soaking the jar in warm water for 5 minutes. Glue residue can be removed with dish soap.

Laboratory Tests

The purity of our formulas is important to us. This is why we have both our raw ingredients as well as our finished products extensively tested by independent laboratories to confirm purity and active ingredient content. Here, we have provided the results of some of the tests carried out on this product.

Sunday Natural

Our Philosophy

For thousands of years, cultures all over the world have been using medicinal plants and nutritious foods to naturally foster and maintain vitality and good health.

With our products, we try to emulate this ancient wisdom as much as possible.

Consequently, our philosophy is simple: everything we do meets the highest standards of quality and purity; our focus is on organic and natural ingredients.

We follow this philosophy with meticulous care on all levels and down to every last detail.

Learn more.

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