Just throwing this out there, Google Chia seeds, very promising reports about this little gem. I may give them a try to see if I feel any different, but for the most part they seem promising and have been around a long time. Of course they aren't cheap.
Heart Doctors recommend Ground Flax seed. So lets compare per oz.
Flaxseed has vitamins C,E,K,B6,Thiamin, niacin, Folate, Pantothenic Acid. Chia seed has none of these.
Flaxseed has 6388 Omega 3 fatty acids and 1655 Omega 6 fatty acids.
Chia seed has 4915 Omega 3 Fatty acids and 1620 Omega 6 fatty acids.
Flaxseed has more Magnesium, Potassium, Zinc, Copper, Maganees and Selenium than Chia seed.
Chia seed wins the calcium score with 177mg compared to flaxseed's 71mg.
I do believe for heart disease Flaxseed wins because of the Omega 3 fatty acids which you need on a plant based diet.
However if you have a bone disease chia seeds with more calcium would be on top.
Flaxseed is also 1/3 of the cost of chia seed.
Source: nutritiondata.self.com