Nutritionists are aware of the benefits of feeding organic selenium (Se) to animals instead of inorganic, mineral sources. However, when it comes to selecting the best organic Se source, it can be tricky. There are more and more options on the market with different specifications and price, and nutritionists can find themselves in the middle of a real jungle where it can be difficult to decide which solution might bring the best price-to-performance ratio. This article aims to give an overview of the organic Se sources available in the market and bring some tips on assessment criteria.