
rubyni® Selenium
Selenium – not only essential for the thyroid gland
Has your hair been looking thinner lately, are your nails brittle? Do you feel tired and exhausted quickly or do you lack the right appetite when eating? Then your body may be lacking a certain trace element: selenium.
Selenium plays an important role in the health of your hair and nails. It is also essential for your thyroid gland: if it does not have enough selenium available, this can lead to hypothyroidism. Last but not least, your body needs the vital substance to protect its cells and keep your immune system strong.
With rubyni® selenium you can specifically prevent an undersupply of this important trace element – vegan, well tolerated and from a natural source.

rubyni® Selenium: An important building block for your body
- Contributes to normal thyroid function1,2,3
- Keeps hair and nails healthy5
- Helps to protect the body’s cells from oxidative stress as a building block1,2,3
- Is a basic element for a good immune system1,2,4
- 100 % vegetable selenium from sunflower seeds
- naturally bound selenium that is readily available to the body
- Only 1 capsule provides 55 µg selenium
- Vegan, lactose- and gluten-free, 100% organic
rubyni® selenium can help you to cover your daily requirement of this vital substance from a natural and purely plant-based source – with the power of sunflower seeds. We have made sure that your body can absorb the selenium in our capsules particularly well.


How much selenium does your body need?
Selenium is a trace element. This means that your body only needs small amounts of the vital substance – but these are essential and must be supplied regularly. But what quantities are involved?
The German Nutrition Society (DGE) gives certain estimated values for selenium. This means that it assumes that the human body is sufficiently supplied with the trace element at this level. According to the DGE, women need 60 micrograms (µg) of selenium per day. For men, it is 70 micrograms per day. Those who are breastfeeding should consume 75 micrograms of selenium per day.3
The European Union (EU) recommends the same amount of selenium for both sexes: 55 micrograms per day. This is the so-called nutrient reference value (NRV for short). This is used as a guide in the manufacture of food supplements when it comes to the dosage of vitamins and minerals.6
Important: Just like an undersupply, an oversupply of selenium can also have a negative effect on your health. Possible symptoms include nausea or nerve disorders.2
But how much selenium does the population actually consume? The European Food Safety Authority (EFSA) has calculated this. It looked at the average intake in various European countries – and came up with an amount of between 31 and 66 micrograms of selenium per day for adults.2 This means that the recommended amount is often not reached.
Well supplied with rubyni® selenium
One rubyni® selenium capsule provides you with 55 micrograms of this important trace element. The amount corresponds to exactly 100% of the daily selenium requirement according to the nutrient reference value (NRV*).
Recommended intake: Take one capsule daily with plenty of water and without chewing.
Note: Do not exceed the recommended daily intake.
*Nutrient reference value (for adults according to the Food Information Regulation (FIR))
rubyni® selenium at a glance: What’s in our capsules
rubyni® Selenium is a dietary supplement with vegan selenium that guarantees you the highest quality from a natural source.
Ingredients:
- Organic sunflower seed extract (from Helianthus annuus, 0.5% selenium)
- Organic carrot powder
- Coating agent hydroxypropyl methylcellulose (plant-based capsule shell),
The selenium in our capsules is naturally bound. This means that the trace element is embedded in a plant matrix that contains other natural components.7 The main form is selenomethionine. It is considered to be particularly easy to utilize.7 It is said to have good bioavailability, which means that your body can absorb it optimally.
Pack size: 90 capsules – in a tin made from recycled PET.
Note: Food supplements should not be used as a substitute for a balanced and varied diet or to replace a healthy lifestyle.


Sustainably grown, gently extracted
The selenium in our rubyni® selenium capsules comes from high-quality sunflower seeds that are grown sustainably and organically. Extraction is carried out gently using purely natural ingredients. This is the process by which the selenium is extracted from the seeds. This enables us to always offer you a high-quality product.
We have combined the trace element in our capsules with freshly harvested organic carrot powder from Germany. It is also sustainably grown and has raw food quality.
Good to know:
Selenium: For the thyroid, beautiful hair and healthy nails
What do you think of when someone tells you about an underactive thyroid gland (hypothyroidism)? The first thing that comes to mind for most people is iodine deficiency. What is less well known, however, is that a lack of selenium also prevents the thyroid gland from working properly. This is because the vital substance is necessary to activate important thyroid hormones.2
Selenium is also a basic building block for your immune system. But the vital substance is also essential for other functions in the body.2
Your hair and nails need selenium to grow and stay healthy. This is because thyroid hormones influence hair-forming cells, among other things. A deficiency can cause hair to grow more slowly, become thinner and dull or even fall out.8
Nails also grow more slowly with a selenium deficiency, become brittle and can split or break quickly. Transverse or longitudinal grooves may also appear on the nails.8 Larger white patches often appear.5,9
Selenium supports muscles and protects cells
Selenium also has an effect on your muscles. After all, skeletal muscles contain up to 50 percent of the amount found in your entire body.10 Do you exercise frequently? Then selenium can help your muscles to recover better after exercise.11 A selenium deficiency, on the other hand, can lead to muscle diseases.5
Selenium has an antioxidant effect – just like our berry extracts12 – and can protect body cells from damage caused by so-called free radicals. This protective effect also affects sperm, i.e. male sperm cells. Men who are unable to conceive usually have very low selenium levels.13 They often also lack zinc.14 Taking these two trace elements can help to improve the quantity and motility of sperm cells.15
Selenium-poor soils as a cause of deficiency
Selenium is found in both animal and plant foods. How much selenium is found in plant foods depends on the content of the soil. In Europe, soils are considered to be low in selenium. This means that plants grown in Germany, for example, contain comparatively little selenium.1,2
This is why people who eat a vegan diet in particular are at an increased risk of selenium deficiency. Unbalanced diets or inflammatory bowel diseases can also lead to an undersupply of this vital substance.5
rubyni® Selenium can help you to cover your daily requirement from a natural source. Just one capsule provides you with the recommended daily dose.
What are the health benefits of selenium?
The trace element is essential for various vital functions 16:
Selenium
- contributes to normal thyroid function
- contributes to the maintenance of normal hair
- contributes to the maintenance of normal nails
- contributes to the normal function of the immune system
- contributes to the protection of cells from oxidative stress
- contributes to normal sperm formation

Quellen:
1) Netdoktor.de. Selen. Stand: 07.01.2025. Hrsg.: BurdaVerlag Publishing GmbH. https://www.netdoktor.de/laborwerte/selen/, zuletzt abgerufen am 26.05.2025
2) Deutsche Gesellschaft für Ernährung (DGE). Ausgewählte Fragen und Antworten zu Selen. Stand: 11.03.2024. https://www.dge.de/gesunde-ernaehrung/faq/selen/, zuletzt abgerufen am 26.05.2025
3) Deutsche Gesellschaft für Ernährung (DGE). Referenzwert: Selen. Stand: 2015. https://www.dge.de/wissenschaft/referenzwerte/selen/, zuletzt abgerufen am 26.05.2025
4) AOK.de. Selen – unverzichtbar fürs Immunsystem. Stand: 07.01.2021. https://www.aok.de/pk/magazin/ernaehrung/vitamine/selen-unverzichtbar-fuers-immunsystem/, zuletzt abgerufen am 26.05.2025
5) Netdoktor.de. Selenmangel. Stand: 07.01.2025. Hrsg.: BurdaVerlag Publishing GmbH. https://www.netdoktor.de/laborwerte/selen/mangel/, zuletzt abgerufen am 26.05.2025
6) Verordnung (EU) Nr. 1169/2011 des Europäischen Parlamente und des Rates vom 25. Oktober 2011. https://eur-lex.europa.eu/legal-content/DE/TXT/PDF/?uri=CELEX:32011R1169&from=EN, zuletzt abgerufen am 20.05.2025
7) verbraucherzentrale.de. Bio-Nahrungsergänzungsmittel. Stand: 12.07.2024. https://www.verbraucherzentrale.de/wissen/lebensmittel/kennzeichnung-und-inhaltsstoffe/bionahrungsergaenzungsmittel-27105, zuletzt abgerufen am 05.06.2025
8) Deutsches Schilddrüsenzentrum. Schilddrüsenunterfunktion (Hypothyreose). https://www.deutsches-schilddruesenzentrum.de/wissenswertes/schilddruesenerkrankungen/schilddruesenunterfunktion, zuletzt abgerufen am 05.06.2025
9) Stuttgarter-Nachrichten.de. Die wahre Ursache für weiße Flecken auf den Fingernägeln. Stand: 19.08.2021. https://www.stuttgarter-nachrichten.de/inhalt.weisse-flecken-fingernaegel-mhsd.d4663df1-a5a6-41d1-9800-258e3c59b5c3.html, zuletzt abgerufen am 05.06.2025
10) Bundesamt für Verbraucherschutz und Lebensmittelsicherheit. Gemeinsame Expertenkommission zur Einstufung von Stoffen: Stellungnahme zur Einstufung von selenhaltigen Produkten (Nr. 02/2021). https://www.bfarm.de/SharedDocs/Downloads/DE/Arzneimittel/Zulassung/ZulRelThemen/abgrenzung/Expertenkommission/stellungnahmen/2021-02.pdf?__blob=publicationFile, zuletzt abgerufen am 26.05.2025
11) Thieme Natürlich. Bedeutung von Selen für Sport und Muskelregeneration. Stand: 04.03.2025. https://natuerlich.thieme.de/therapieverfahren/naehrstofftherapie/detail/bedeutung-von-selen-fuer-sport-und-muskelregeneration-4100, zuletzt abgerufen am 27.05.2025.
12) Huang WY et al. Survey of antioxidant capacity and phenolic composition of blueberry, blackberry, and strawberry in Nanjing. J Zhejiang Univ Sci B. 2012 Feb; 13(2): 94–102. https://pmc.ncbi.nlm.nih.gov/articles/PMC3274736/
13) Yang D et al. Selenium homeostasis and male reproduction. Biochem Biophys Res Commun. 2025 Jun 8: 765: 151879. https://www.sciencedirect.com/science/article/abs/pii/S0006291X25005935
14) VitaminDoctor.com. Mikronährstoffe für Männer bei Kinderwunsch. Stand: 14.09.2023. https://www.vitamindoctor.com/gesund-bleiben/kinderwunsch/mann, zuletzt abgerufen am 05.06.2025
15) Kaltsas A. Oxidative Stress and Male Infertility: The Protective Role of Antioxidants. Medicina (Kaunas). 2023 Oct 4;59(10):1769. http://pmc.ncbi.nlm.nih.gov/articles/PMC10608597/
16) Verordnung (EU) Nr. 432/2012 der Kommission vom 16. Mai 2012 zur Festlegung einer Liste zulässiger anderer gesundheitsbezogener Angaben über Lebensmittel… Stand: 19.08.2024. https://eur-lex.europa.eu/legal-content/DE/TXT/PDF/?uri=CELEX:02012R0432-20240819, zuletzt abgerufen am 05.06.2025
convinced by rubyni®
As a former professional athlete and health-conscious person, my physical performance and well-being are extremely important to me. That's why I take rubyni® with elderberry - it's now part of my daily routine. I am convinced of the positive effects of elderberries on my immune system, my energy balance and my fitness, especially during regeneration after periods of stress

Tobias Angerer
Cross-country skier
I work as a nutrition and health consultant and am a trained phytotherapist. Transparency, sustainability, and quality are very important to me. And I have to say that rubyni® has completely convinced me as a brand. The capsules contain only extremely high-quality and natural ingredients whose effectiveness has been proven by studies and which supply the body with important nutrients. On my YouTube channel Ohlala & Solala I have published some videos about my personal rubyni® journey. There I share even more about what makes this supplement so special from my point of view.

Andrea Sokol
Phytotherapist | Nutrition and Health Consultant
As a biathlete, I have to be in top shape and perform to the letter. I had big problems with that in the past. My body was always weakened and I had to accept many setbacks. When I was looking for a solution to support my immune system permanently, I found elderberries as a superfood through my alternative practitioner. In the meantime, I take rubyni® with elderberries daily. The capsules are also super handy when I'm on the road in the World Cup. rubyni® is a valuable help for me in stressful competition phases and my immune system is finally back on top.

Hanna Kebinger
biathlete
For more than 25 years, my focus has been on holistic, naturopathic medicine, with a particular interest in nutritional and biological topics. During this time, I have intensively studied current research findings (e.g. on orthomolecular medicine, epigenetics, nutrigenomics, phytotherapy). I found rubyni's philosophy of using total extracts with the complete efficacy profile of the entire fruit matrix exciting and convincing from the very beginning. That's why I was happy to take on the task of developing new products that would contain rubyni , but at the same time - in the sense of a synergism of effects - other ingredients for a specific purpose. rubyni® Visio now contains carefully coordinated ingredients that are specially formulated to meet the specific needs of the eyes. Valuable plant extracts and micronutrients have been combined to form a high-quality dietary supplement. This helps to maintain eye health and support vision.

Prof. Dr. rer. nat. Michaela Döll