I feel like you are purposefully trying to leave me without information. Is it really that bad that I need to find out for myself?[/quote]
Some folks are like that. >_<
Marloss food has minor food value and is marginally unhealthy, but has a variety of (random roll) special effects on consumption. Can fully feed you, induce vomiting, mutate/purify, rarely purify-and-remove-radiation, or give you a weird fungalizer infestation that makes you spawn fungus (and likely more berries) every time you eat the matching variety. Get all three infestations and you can become a high-level fungal being.
*Folks have been known to nickname 'em “funberries”. 