If you mean nutritious in the bait sense, these are the strongest matches. Parker Baits OG Fish Boilies – 1kg and Parker Baits OG Fish Boilies – 5kg are described as packed with intensely nutritious ingredients. Munch Baits King Crab Boilies 5kg is built around refined proteins and marine meals for a nutritious year-round food source. Poacher Baits Fruit Frenzy Boilies also calls out Robin Red as a nutritious attractor, while Hinders Baits Hinders Maple Peas are rich in vitamins and minerals and highly digestible.
Switch away from these if you want a more instant visual trigger bait, a surface presentation, or a predator lure. For carp, move to a different bait profile if fish are ignoring food baits or if you need a stronger single-hookbait scent/flavour match.