Chlorophyll
Chlorophylls (Greek chloros = light green; phyllon = leaf) are green pigments found in plants and are therefore known as “leaf green”. They have a crucial function in photosynthesis: for example, they can absorb light and pass on the energy taken up.
Chlorophyll content is highest in fresh grass and declines during hay-making due to exposure to sunlight, as well as during storage.
Since chlorophyll is similar in structure and properties to the red blood pigment haemoglobin, there is a discussion as to whether the buffering effect of rations rich in green feed (similar to the blood-buffering property of haemoglobin) can be attributed to chlorophyll (Goren, 2014). According to this, chlorophyll or rations rich in green fodder/hay have a positive effect on the DCAB (dietary cation-anion balance) and the acid-base balance of horses.