Izinkinga zokulala, i-melatonin iba yisixazululo Ngokuphila okusheshayo kanye nomsebenzi ocindezelayo emphakathini wanamuhla, abantu babhekana nezinkinga ezengeziwe ebuthongweni. Izinkinga zokulala seziyinkinga evamile emhlabeni wonke, futhi i-melatonin, njenge-hormone yemvelo, ibhekwa njengendlela ephumelelayo ...
Funda kabanzi