Olestra (also known by its brand name Olean) is a fat substitute food additive that adds no metabolizable calories to products. It has been used in the preparation of otherwise high-fat foods, thereby lowering or eliminating their fat content.

The Food and Drug Administration (FDA) approved olestra for use in the US as a replacement for fats and oils in prepackaged ready-to-eat snacks in 1996,[2] concluding that such use "meets the safety standard for food additives, reasonable certainty of no harm".[3]: 46399  In the early 2000s, olestra lost popularity due to supposed side effects and is largely phased out, but products containing the ingredient are available in some countries.

Pluto (minor-planet designation: 134340 Pluto) is a dwarf planet in the Kuiper belt, a ring of bodies beyond the orbit of Neptune. It is the ninth-largest and tenth-most-massive known object to directly orbit the Sun. It is the largest known trans-Neptunian object by volume by a small margin, but is less massive than Eris. Like other Kuiper belt objects, Pluto is made primarily of ice and rock and is much smaller than the inner planets. Pluto has roughly one-sixth the mass of the Moon and one-third its volume. Originally considered a planet, its classification was changed when astronomers adopted a new definition of planet.

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