I say better that not taking it at all in most situations, but natural sources of vitamins and minerals is always more beneficial. For example D3 produced by our body from sun exposure vs D3 supplementation. I think there is likely a physiological benefit from the conversion process.
Discussion
What’s your favorite brand? I’m now interested
Of Natto? I get the ones on sale usually. My palate is not refined enough with natto to notice a difference in flavor. Just make sure to get one with a sauce packet, add japanese mustard or red pepper seasoning if its not enough flavor. My husband eats his with rice and seaweed because he doesn’t love the texture even with the egg.