8. Flaxseed
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Flaxseed is a rich source of omega-3 fatty acid, and just two spoons of this seed you enough omega-3 for a week. Flaxseed contains more than enough omega-3 fatty acid you will need in a week.
Research carried out on flaxseed has shown that it can greatly decrease the causative agents of inflammation in the joints. This is a good source for vegetarians to get their omega-3 levels up.