Title says all. Plant cells are covered by cell wall made of cellulose. The human body doesn’t have the enzyme cellulase to digest it, so why do we eat them? Do they just pass through us? If so, why are they ‘healthy’?
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They contain other forms of energy as well. Cellulose is pretty low in energy, so to live off it we’d need to eat lots of it and slow down digestion. We favor more efficient nutrients like sugar, starch, fat and protein, luckily many plants include them too. (The plant stores energy in that form for example)
The cellulose just passes through us, and that is actually also not a bad thing, we know it as “fibre” wich helps our body flush stuff through our digestive tract.
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