Silica 350mg
Organic Silicon

36% Silicon

Diatomaceous earth with 350mg of organically bound silicon (silica) and 163.5mg of elemental silicon per capsule. From the original sediment of the only natural diatom reservoir in Central Europe, in the north of Hungary. Standardized to a full 77% silica and a full 36% elemental silicon. Ultra-pure, vegan capsule shells, free of carrageenan and PEG. Free of chemical solvents and carriers such as maltodextrin. Gluten-free, lactose-free, non-GMO, additive-free. 120 capsules
  • 100% natural silicon from fossilized shells of diatom.
  • Per capsule: Full 350mg of silica, of which 163.5mg is elemental silicon
  • 100% natural source: Fossilized diatom shells
  • Silicon: building block of connective tissue, blood vessels, tendons, ligaments, bones, cartilage, hair and nails
  • High content of organically bound silicon with 77%, of which 36% is pure silicon
  • From diatoms origin in the north of Hungary
  • The only diatom reservoir in Central Europe
  • Standardized to 77% natural silica, of which 36% is pure silicon
  • Without additives and anti-caking agents (e.g. magnesium stearate), without genetic engineering

120 capsules

Delivery : 1–3 business days

Incl. VAT, excl. Shipping

€129.36 / 1kg
In stock

Premium Bioactive Ingredients

  • Diatomaceous earth with 77% silica
  • 350mg silica per capsule
  • 163.5mg silicon per capsule
  • Fossilised diatom shells from a natural diatomite deposit
  • Sourced from Northern Hungary, the only reservoir of fossilised diatoms in Europe
  • Standardised to 77% silica, of which 36% is pure silicon
  • Silica: component of connective tissue, blood vessels, tendons, ligaments, bones, cartilage, hair and nails

How are we different?

The diatom soil for our silica capsules comes from the original sediment of a freshwater reservoir that dried up millions of years ago and extended over 25 km² in Central Europe, more precisely in northern Hungary. Due to the disappearance of the once existing lake, countless unicellular diatoms died and their silica shells enriched the sediment there.

Over millions of years, a 10-meter-thick diatom layer thus developed, from which mining has been going on since the 1950s. The deposit is the only one of its kind in Central Europe. The diatom soil extracted there, enriched with silicic acid, serves as a valuable raw material for our silicic acid capsules.

The natural silicic acid contained comes from the fossilized diatom shells and is standardized to a full 77% organically bound silicon (silicic acid) with a full 36% bioavailable elemental silicon.

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 jars.


  • 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


Diatomaceous earth consists of the fossilised remains of diatoms, microscopic unicellular microalgae, whose shells contain particularly high amounts of silica. They live in freshwater and marine environments and have the ability to absorb silicic acid from seawater and convert it into silica for their own shells. For this reason, diatomite deposits are often found in areas close to volcanoes. There, the microalgae have access to easily soluble silicic acid from the volcanic rock.

During their life, they lose their shells and thus enrich the soil with their silicic acid-containing cell envelopes. If their biotope changes due to the drying out of a lake or other environmental influences, they can even die off en masse. The diatom soil that then develops is deposited and sometimes forms metre-high layers that contain particularly high amounts of silicic acid.


This mineral's name comes from the Latin word "silex", meaning hard stone. Silicon, at 28%, is the second most abundant element in the earth's crust. For every kilogram of body weight in the human body, approximately 20mg is silicon, although this value seems to decrease with age. It is found in connective tissue, blood vessels, tendons and ligaments as well as bones, cartilage, hair and nails. Whole grains (brown millet and oats, in particular), as well as horsetail, bamboo shoots and diatoms, are good sources of silicon.

Organic Silicon

Silica is present in plants and other organisms in the form of orthosilicic acid, a compound which is not fully bioavailable in the presence of certain dietary fibres. Our diatomaceous earth capsules, standardised to 77% silica, contain 350mg of silica and provide 163.5mg of elemental silicon.

General Silicon Requirements

Silicon is one of the potentially essential trace elements, so it does not yet have an official recommended intake (NRV). The daily amount excreted in the urine is between 10 and 40 mg.


Recommended Dosage

Take 1 capsule daily with 200ml of water before a meal.


Not suitable for use during pregnancy.

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: Diatomaceous Earth.
Capsule shells: Hydroxypropyl Methylcellulose.
Contains: 120 capsules

Ingredients / Capsule % NRV*
Diatomaceous Earth 455mg -**
     of which silica 350mg -**
     of which silicon 163.5mg -**

* % Nutrient Reference Value
** no reference available

Per capsule: 455mg diatomaceous earth; 350mg silica; 163.5mg silicon
In total: 54.6g diatomaceous earth; 42g silica; 19.62g silicon/jar


Product Details

German Pharmaceutical Number (PZN) 17566591
Origin Diatomaceous earth sourced from a natural diatomite deposit in Northern Hungary.
Production 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.

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.

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