Sodium Selenite
200µg Capsules

Highly Bioactive

High-dose selenium in the form of ultra pure and highly bioactive sodium selenite. 200µg elemental selenium per capsule. Premium ingredient in pharmaceutical quality. Fibre-rich sprouted buckwheat powder used as a filler. Vegan, free from PEG and carrageenans, no additives. 120 capsules
  • 200µg elemental selenium per capsule
  • Inorganic selenium in the form of sodium selenite
  • Highly bioactive form of selenium
  • Fully available for selenium enzymes
  • Ultra pure pharmaceutical quality
  • No accumulation in the body
  • Fibre-rich sprouted buckwheat powder used as a nutritious filler
120 capsules

Delivery : 1–3 business days

Incl. VAT, excl. Shipping

€334.46 / 1kg
In stock

Premium Bioactive Ingredients

  • 200µg elemental selenium per capsule
  • Ultra pure pharmaceutical quality
  • Inorganic selenium in the form of sodium selenite
  • Highly bioactive form of selenium
  • Fully available for selenium enzymes
  • No accumulation in the body
  • Fibre-rich sprouted buckwheat powder used as a nutritious filler


How are we different?

Unlike organic forms of selenium, some of which are incorporated into bodily proteins and are not directly available for selenium metabolism, sodium selenite is incorporated directly into selenoproteins, which are special proteins regulated through selenium metabolism, preventing it from accumulating in the body. In contrast, the incorporation of organic selenium into proteins is not regulated, which can lead to very high selenium levels if intake is consistent. Taken as recommended, sodium selenite is a very safe form of selenium which is directly bioavailable.

Our sodium selenite is an ultra-pure, pharmaceutical grade compound. Since sodium selenite does not exist as a pure compound, we have chosen to combine it with calcium carbonate. This is one of the most widely used compounds in the world, functions as a source of calcium and is also approved for use as organic foodstuff.

The filler, which is made of premium acacia fibre grown without pesticides, is the only additive. In contrast to microcrystalline cellulose, which is often synthetic and high in nanoparticles, we use a 100% natural and fibre-rich food as a filler. Our acacia fibre comes from sustainable, climate-neutral, resource-conserving and fair cultivation.

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



Selenium is a vital essential trace element and an integral component of more than 25 enzymes. It is involved in several important bodily functions including maintaining normal immune system function, protecting cells from oxidative damage, thyroid function and keeping hair and nails healthy.

Health Benefits of Selenium according to the European Food Safety Authority (EFSA)

Selenium contributes to:

  • Protection of cells against oxidative stress
  • Normal function of the immune system (physical defense)
  • Normal thyroid function
  • Normal spermatogenesis (formation of sperm cells)
  • Maintenance of normal hair
  • Maintenance of normal nails


Recommended Dosage

Take 1 capsule (200µg selenium) daily with 200ml water.

Daily Requirements

To avoid developing a deficiency, the official daily requirement for selenium according to the German Nutrition Society (DGE) corresponds to 30µg-70µg (NRV: 55µg).


While vitamin C in small amounts (about 200mg) is beneficial for selenium absorption, high doses of vitamin C (over 1g) have an inhibitory effect on selenium intake. In such cases, an intake interval of 1 hour is recommended.

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: Sodium Selenite, Calcium Ascorbate, Acacia Fibre.
Capsule shells: Hydroxypropyl Methylcellulose.
Contains: 120 capsules

Ingredients / Capsule   NRV%*
Sodium Selenite 460µg -**
  of which selenium 200µg 364

* % Nutrient Reference Value 
** no reference available

Per capsule: 200µg Selenium
In total: 24,000µg Selenium / jar

Product Details

German Pharmaceutical Number (PZN): 16130064
Origin Synthetic active ingredient in pharmaceutical quality. Sodium selenite cannot be derived from natural sources
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

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.

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