Raspberry ketone is a chemical from red raspberries, as well as kiwifruit, peaches, grapes, apples, other berries, vegetables such as rhubarb, and the bark of yew, maple, and pine trees. Raspberry ketone is a chemical from red raspberries that is thought to help with weight loss. Some research in animals or in test tubes shows that raspberry ketone might increase some measures of metabolism.
How Do Raspberry Ketones Work?
The molecular structure of ketones is very similar to two other molecules, capsaicin — found in chili pepper — and the stimulant synephrine.
Studies indicate that these molecules can boost metabolism. Therefore, researchers speculated that raspberry ketones could have the same effect.
In test-tube studies of fat cells in mice, raspberry ketones:
- Increased fat breakdown — primarily by making the cells more susceptible to the fat-burning hormone norepinephrine.
- Increased release of the hormone adiponectin.
Adiponectin is released by fat cells and may play a role in regulating metabolism and blood sugar levels.
People with normal weight have much higher levels of adiponectin than those who are overweight. Levels of this hormone increase when people lose weight.
Studies demonstrate that people with low adiponectin levels are at a higher risk of obesity, type 2 diabetes, fatty liver disease, and even heart disease.
Therefore, it seems that raising adiponectin levels could help people lose weight and lower the risk of many diseases.
However, even if raspberry ketones raise adiponectin in isolated fat cells from mice, this does not mean that the same effect will occur in a living organism.
Keep in mind that there are natural ways to increase adiponectin that do not involve raspberry ketones.
For example, exercise can increase adiponectin levels by 260% in as little as one week. Drinking coffee is also linked to higher levels.