How to access plant extracts based products in 5 steps with Fitek method?

The evolutions of the worldwide regulatory frameworks pushing for the global reduction of the use of antimicrobial substance in animal nutrition have highlighted the interest for phytomolecules and by consequence, have also increased the amount of available information to users. Phytomolecules benefits are described everywhere in the media and any providers has its own and distinct vocabulary to explain their advantages. Some manufacturers talk about “the effects of essential oils”, some others “of the benefits of phytogenics”, or “the use of plant extracts”. As a final user of these additives (feed manufacturers, premixers, integrators…), how to differentiate products between them and how to assess their quality and efficacy?