The best selenium in capsules - TOP 5 in 2025
Selenium, although present in the body in small amounts, is of great importance for its proper functioning. A deficiency of selenium in the diet can lead to serious health consequences. Increased risk of infection, weakened immunity and increased susceptibility to inflammation are just some of the problems associated with a deficiency of this element. Hair loss, thyroid dysfunction and mental deterioration can also be linked to too low a selenium content in the body. Adequate selenium supplementation can therefore be key to maintaining the health and well-being of the body. We have taken a look at selenium supplements and have selected 5 products that can help to correct selenium deficiencies.
The ranking factors we took into account were:
- Form of selenium
- Number of capsules per pack
- Easy dosage
- Bioavailability
- Safety
- Value for money
- Feedback
What qualities to look for in a good selenium supplement?
Bioavailability: it is important to choose a supplement that has a high bioavailability, meaning that it is easily absorbed by the body. Choosing selenium with L-selenomethionine can increase its bioavailability compared to inorganic selenium.
No artificial additives: avoid supplements that contain artificial colours and preservatives. A good supplement should be free of unnecessary substances.
Appropriate dosage: check that the supplement contains the correct dose of selenium as recommended by specialists. For adults, a dose of 55 to 200 microgrammes per day is usually recommended. This is very important as selenium can be overdosed.
Supporting ingredients: ingredients, such as vitamins or minerals, can support the effects of selenium. It is worth noting their presence and their potential health benefits.
Take a look at the ranking for the best selenium:
Nutridome Selenium is a dietary supplement in capsule form, which provides the body with an optimal dose of selenium in the form of L-selenomethionine. By using this form of selenium, the supplement guarantees better bioavailability compared to other forms of this element. Studies have shown that supplementation with L-selenomethionine effectively increases serum selenium levels, which translates into better results than traditional preparations with sodium selenite or selenocysteine. Nutridome Selenium, a simple formulation with no artificial colours or preservatives, guarantees effective support for the body. It supports the healthy appearance of hair, skin and nails. It contributes to the normal functioning of the thyroid gland and is a particular support for people with Hashimoto's disease. As an element with a key role in many biological processes, selenium helps to protect cells from oxidative stress while strengthening the immune system and thyroid gland. A pack of selenium from Nutridome lasts for 60 days of use.
Swanson Selenium SelenoExcell, is a dietary supplement containing a high dose of selenium. This valuable ingredient has been encapsulated in capsules that are suitable for adults as a supplement to their daily balanced diet. However, due to the gelatine encapsulation, it will not be suitable for vegans and vegetarians. The Swanson® brand supplement uses SelenoExcell®, a special selenium-enriched yeast with high bioavailability. Each capsule provides 200 µg of natural selenium, covering the daily requirement of this essential mineral by up to 364%. Among other things, selenium supports the proper functioning of the immune system and protects cells from oxidative stress. Swanson® SelenoExcell® Selenium only needs to be taken as little as 1 capsule per day to achieve the beneficial effects of the claimed action, although it is worth noting that it contains gelatine and fillers.
Formeds' Bicaps Selenium is a capsule that provides 300 μg of selenium. It contains the organic form of selenium, l-selenomethionine, which is formed by converting a sulphur molecule to a selenium molecule in methionine. This is a highly bioavailable form of selenium that is rapidly absorbed from the digestive system. Ensuring adequate selenium levels in the body is important for the proper functioning of the immune system and thyroid gland. ForMeds Selenium acts as an antioxidant, neutralising free radicals that are harmful to the body, and supports the proper functioning of the immune system and thyroid gland. Additionally, it supports the maintenance of healthy hair, skin and nails. Due to the high dose concentration in the capsule, it may be too high and the product is recommended for people with laboratory-confirmed high selenium deficiencies in the body.
Now Foods Selenium 200 mcg has been specially formulated for people who frequently experience infections and struggle with viral infections. The selenium contained in the supplement supports endurance and immunity. Selenium also has a positive effect on mood, eliminating feelings of fatigue and exhaustion. It also actively neutralises free radicals, delaying tissue degeneration and ageing processes. Thanks to its highly bioavailable form of selenium, the Now Foods Selenium 200 mcg dietary supplement strengthens the body's immunity, cleanses it of toxins and exhibits antiviral effects, while strengthening the circulatory system and stabilising the production of thyroid hormones. The only downside to the supplement is the capsules, which some may find too large and hard to swallow.
Biorythm Selenium is a dietary supplement that contains selenium in the form of L-selenomethionine, characterised by high bioavailability. The product is designed for people who care about the health and appearance of their skin, hair and nails. Biorythm Selenium also supports the proper functioning of the thyroid and the immune system, protecting the body's cells against oxidative stress. In addition, it contributes to normal spermatogenesis in men. The Biorythm™ line was created using a modern and unique technology on the dietary supplement market called SR (Sustained Release), which ensures prolonged release of active substances. This also translates into the fact that the supplement contains additional anti-caking agents, fillers and colour. The relatively low dose of selenium (100 mcg) places the product last in the list.
