Flaxseed - to grind or not to grind?

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My husband and I are trying to make a lifestyle change, We just incorporated several new foods that I don't know much about. I bought flaxseed, after I read about its many benefits, in whole seed form. I sprinkle it on many things. Since then, I've heard that there is no benefit in flaxseed unless it is completely ground. Is this true? If so, how do I grind the seeds I already have. Thoughts?