PENTAKEEP- S is the one and only product in the world that 5-aminolevulinic acid. PENTAKEEP- S is a liquid nitrogen fertilizer to which 5-aminolevulinic acid has been added. This amino acid enhances the photosynthesis of the plant. 5-aminolevulinic acid is an important amino acid for the plant, it plays an important role in the formation of chlorophyll (leaf green). The fertilizer mix PENTAKEEP- S includes, inter alia, nitrogen, magnesium and trace elements. It is proved that these nutrients in conjunction with 5-aminolevulinic acid have an enhancing effect on the growth of plants. Pentakeep as the only fertilizer in the world the 5-aminolevulinic acid (ALA). ALA is present in a limited extent in every living organism. By adding to the plant increases photosynthesis and the production of sugars and dry matter. This is similar to the formula sunlight + CO2> sugar and oxygen. It is known that extra CO2 under light conditions, increases the production and that the process can go through longer because the absence of CO2, which would stop the reaction, is not at issue. Administration of Pentakeep manifests itself in more production and better quality. But not only benefit the production of the extra dry matter. The crop is stronger and more vital. Because the plant is energized it will also be less susceptible to disease or pests.