FIR rays are biologically active and transfer heat to the center of materials evenly without decomposing the molecules on material’s surface. FIR may capable to cleave covalent bonds and release some bound- antioxidants such as flavonoids, carotene, tannin, ascorbate, flavoprotein, or polyphenols from polymers. Effects of processing methods on bioactive
compounds of plant samples could vary from no change to significant losses, or even enhancement in bioactive compounds and antioxidant activities