Omega-3 fatty acids can be found in wild salmon, grass fed meats, leafy greens, nuts, flax, and more. They are, essentially, the good fat.
Omega-3 has been shown to protect against inflammation of the arteries, lower levels of triglycerides and lower blood pressure.
Some work even suggests they may be beneficial in protecting against rheumatoid arthritis, cancer, ADHD, and dementia.
You can find them in:
Salmon and tuna (wild caught salmon, please--albacore tuna is best)
Grass fed meats