Yarrow is an herb with some great health benefits.   We do have yarrow on our website so that you can see the health benefits.   This candle is made with organic soy wax,  lead free wick, and scented with cedarwood,  which is a great scent.   This is a 16 oz candle.  There are green advantage for choosing soy  wax, becasue it burns slower than paraffin wax, and last longer.  Soy wax also burns slow and produce less soot.  There are other reasons for using soy wax,  your health,  eco friendly,  scents stronger and scents better.   Follow your candle care guideline for the life of your candle