Raspberry ketones are the compound responsible for the fruit's distinctive aroma, and they've been studied in laboratory settings for a possible link to adiponectin and fat metabolism.
The human evidence behind this specific ingredient is thinner than for the others in this formula — it's a supporting ingredient, not one worth buying the product for on its own.
It's included as part of the six-ingredient blend rather than as a headline component.
Where it sits in the formula: one of six named ingredients on the LipoPeak label, alongside Green Tea Leaf Extract, Cayenne Pepper Fruit Extract, Gymnema Sylvestre.