Marionette lines are the grooves that develop around your nose to the outside of your lips, deepening as you age.
Flaxseed, it you can afford it, and the lines bother you, then go for it. I would ask around for a good reference to a clinic, and maybe ask for some before and after photos of previous work.
So many of us say we are not going to have anything done, and let nature take it's course, but some of us do end up with features that we really don't like. For me it is mid-cheek lines, from the inner corner of my eye to mid-cheek. They aren't quite proper eye-bags, but I'm afraid they will be in years to come! I would love laser tightening treatment, but I just can't justify spending the amount on myself. I do some face-yoga in the mornings to keep the muscles underneath stronger, but you can't stop time...