User can endlessly nourished to growth, perfect health, permanently re-energized, and be kept in good condition. Users can use any source of power or natural substances necessary to be indefinitely sustained.
Fae-Vampire Hybrids (True Blood); via Fae-Vampire blood
Shendu (Jackie Chan Adventures); Via Talismans
Hybrids (Twilight Saga)
Ultimate Mr. Fantastic (Marvel Comics)
Due to the Uranium-235 core that animates and powers his body, Adam (Buffy the Vampire Slayer) has a supply of energy that lasts "essentially forever", making him endlessly nourished without any need of food, water, or sleep.
Though he deeply enjoys eating regardless, Cerberus/Kero (Cardcaptor Sakura) draws his power from the sun and generates his own energy, sustaining him and making him independent of food to survive..
Androids 17 and 18 (Dragon Ball series) possess infinite energy generators that sustain them, making them independent of food or sleep.
Superman (DC Comics), as a Kryptonian, can be endlessly nourished by the sun making independent of eating and sleeping.
Shendu (Jackie Chan Adventures) relies on the Talismans not just for power but also for sustenance, in using the Dog, Horse and Rat talismans to keep him immortal, self-healing and animated, making him endlessly sustained.
Ultimate Mr. Fantastic's (Marvel Comics) organs have been replaced with a "bacterial stack" that generates energy to fuel his body, sustaining him and removing his need for food or water.
As a human-vampire hybrid, Renesmee Cullen (Twilight) has a beating heart that pumps blood in her system indefinitely sustaining her.