Walnut Oil: Alternative to Flax?

I picked up a bottle of walnut oil the other night because I was out of flax oil. Now I know walnut oil is high in Omega-3, but is it a good alternative to flax oil??

I know flax oil contains organic compounds called lignans, that may act as estrogen blockers. Aside from this, are there any other nutritional components I’d be missing if I used walnut oil instead of flax oil??

Thanks,

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