Can furu products be used to supplement daily vitamin B12 requirements?

No. Although vitamin B12 has been reported to be present in ‘fermented tofu’ (furu), a traditional Chinese fermented tofu product, the levels are not high. Recent research indicates that grey furu has the highest vitamin B12 content (approximately 1.1 μg/100 g), whilst the levels in other products are all below 0.4 μg/100 g. Furthermore, only about 9% of the total vitamin B12 in grey furu is bioactive, with the remainder identified as inactive porphyrin compounds. Other products exhibit similar characteristics. These findings suggest that, although grey furu may provide small amounts of bioactive vitamin B12, commercially available furu products are not a reliable source of vitamin B12.

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