Tannin extracts were prepared from barks of maritime pine (Pinus maritimus). aleppo pine (Pinus halepensis). Norway spruce (Picea abies) and from a mixture of barks of different pine species (Pinus spp. namely 20% black pine (Pinus thunbergii)+ 30% Scots pine (Pinus sylvestris) + 20% maritime pine (Pinus maritimus) + 10% Aleppo Pine (Pinus halepensis) + 5% Douglas fir (Pseudotsuga men... https://parisnaturalfoodes.shop/product-category/ps-300-phosphatidylserine/