@Liquidxlax and anyone else who's never seen a Stat Seed. In J-RPG's there are items that raise base stats like HP, MP, ATK, DEX etc by +1 (more recently ive seen games do +10 or so for HP and MP though so it depends on the dev's preference) .They started out as seeds since a seed "grows" by being nurtured with dedication, and stats are "grown" from hard work and dedication- so eating a magic seed
obviously means you absorb all the "growth" it would have done! In more recent titles it could be anything so long as its a consumable item, i've gone and had to eat sausages to get more HP for petes sake xd. The difference with a Stat Seed vs a Restorative Potion,etc, is that said potion only restores used HP/MP up to you HP pool / MP pool 's maximum while a Stat Seed PERMANENTLY RAISES the Max Amount of the corresponding pool. That also means it is not a "Buff" since "Buff"'s are temporary. So if you ever find one, make sure you have the most suited character consume it, since those things are fukin rare!
ps. (I just remembered i could link this(https://bulbapedia.bulbagarden.net/wiki/Vitamin) in the middle of typing all that and instead have said "The seed he ate is like a PP-Up in Pokemon.")