I am 30 years old, is it good if i start to take omega 3+squalene daily as daily supplement? thank you

NO: It's a waste of your money. Just eat a balanced, nutritious diet and get some exercise each day and you'll be doing yourself a better service. Check this out: http://www.Nhlbi.Nih.Gov/health/public/heart/obesity/lose_wt/calories.Htm.

Why take either?: If your lipids are normal, i doubt either of these substances are helpful. The are no clinical studies to my knowledge supporting any benefit of squalene is humans. There was also a recent study which is open to criticism that suggests omega-3 increases the risk of prostate cancer.