How do you take raspberry ketones
Raspberry Ketone - Dangerous Slimming Agent From The Internet?
What's behind the raspberry ketone advertisement?
Products containing raspberry ketone are gaining popularity through clever online advertising. On the Internet, such products are mainly offered as "natural fat burners". This advertising claim was rejected at European level due to a lack of scientific evidence and is therefore not permitted.
According to studies mainly on mice, raspberry ketone is said to increase fat burning, reduce fat storage and counteract weight gain from a high-calorie diet. This is supposed to be triggered by the alleged activating effect of raspberry ketone on fat cells: fat cells form certain proteins, so-called adipokines. These influence, among other things. the energy metabolism and actively improve the effect of insulin. Some adipokines (e.g. adiponectin) are important in burning fat and regulating appetite.
Raspberry ketone is said to increase the formation of adiponectin and thus lead to weight loss. However, no reliable scientific evidence has been found that raspberry ketone stimulates adiponectin production in order to cause and explain weight loss in humans.
The chemical structure of raspberry ketone is similar to synephrine and capsaicin; the latter is found in chilli pods, for example. The two substances are known to speed up the metabolism. However, products with these ingredients can also have unpleasant to dangerous side effects such as high blood pressure, sleep disorders or palpitations or even heart attacks.
What should I look out for when using raspberry ketone products?
A health assessment of raspberry ketone (rheosmin) as an ingredient in food supplements is currently not possible. The range is very large in online shops. The daily recommendation used in the remedies (from 300 to 1500 mg raspberry ketone per day) is probably too low to achieve an effect, a higher dose would be potentially dangerous.
In the past, the European Rapid Alert System (RASFF) recorded food supplements with raspberry ketone that were classified as novel foods. These had to be taken off the market because they are not approved. The products came to Germany from the United States or the United Kingdom via Poland. Many products from the Internet offer have manufacturers based in the USA, the Netherlands or Belgium. Caution should therefore be exercised with products from the Internet or outside the EU; they shouldn't be taken.
What is raspberry ketone?
As the name suggests, this substance is among other things. contained in raspberries and responsible for the typical aroma of the fruit. However, it occurs naturally only in small quantities, so that it must be technologically produced for use in sports products and other dietary supplements. Raspberry ketone extracts (in a ratio of 1: 4 ethanol: water) with the chemical name 4- (4-hydroxyphenyl) -butan-2-one are only approved for flavoring foods such as confectionery.
The UK Food Standard Agency (FSA) found in 2014 that there were products on the market where the raspberry ketone extract did not meet the standard. Therefore, they were classified as a novel food. This means that they should only be sold after extensive safety investigations. Since these studies are not yet available, the sale of these dietary supplements is not allowed; since the health risk from the consumption of food supplements containing ketones cannot be assessed.
There are no concerns about aqueous extracts from raspberries.
What ingredients do raspberry ketone products contain?
There are many products that contain only raspberry ketone and some that have been fortified with additional ingredients (e.g. açai powder, green tea, green coffee beans, African mango).
How the raspberry ketone was obtained and what extract preparation the respective product is, is usually not stated on the product.
- "Natural" slimming products can be advertised well. However, it is neither certain that the respective raspberry ketone preparation is approved, nor has an appetite-suppressing or fat-burning effect on humans been proven.
- Instead, potentially dangerous side effects can occur.
Park KS. Raspberry ketone increases both lipolysis and fatty acid oxidation in 3T3-L1 adipocytes. Planta medica. 2010 Oct; 76 (15): 1654-8. PubMed PMID: 20425690. (Accessed on 29.09.2020)
Nigro E, Scudiero O, Monaco ML, Palmieri A, Mazzarella G, Costagliola C, et al. New Insight into Adiponectin Role in Obesity and Obesity-Related Diseases. BioMed research international. 2014; 2014: 658913. PubMed PMID: 25110685. (Accessed on 29.09.2020)
Morimoto C, Satoh Y, Hara M, Inoue S, Tsujita T, Okuda H. Anti-obese action of raspberry ketone. Life sciences. 2005 May 27; 77 (2): 194-204. PubMed PMID: 15862604. (Accessed on 29.09.2020)
Wang L, Meng X, Zhang F. Raspberry ketone protects rats fed high-fat diets against nonalcoholic steatohepatitis. Journal of medicinal food. 2012 May; 15 (5): 495-503. PubMed PMID: 22551412. Pubmed Central PMCID: 3338106. (Accessed on 29.09.2020)
Harada N, Okajima K, Narimatsu N, Kurihara H, Nakagata N. Effect of topical application of raspberry ketone on dermal production of insulin-like growth factor-I in mice and on hair growth and skin elasticity in humans. Growth hormone & IGF research: Official journal of the Growth Hormone Research Society and the International IGF Research Society. 2008 Aug; 18 (4): 335-44. PubMed PMID: 18321745. (Accessed on 29.09.2020)
Lopez H, Ziegenfuss T, Hofheins JE, Habowski S, Shawn M Arent, Joseph P Weir & Arny A Ferrando. Eight weeks of supplementation with a multi-ingredient weight loss product enhances body composition, reduces hip and waist girth, and increases energy levels in overweight men and women. Journal of the International Society of Sports Nutrition volume 10, Article number: 22 (2013). (Accessed on September 29, 2020)
https://www.aerzteblatt.de/archiv/44822/Adipokine-Moegliches-Bindeglied- between-Insulinresistenz-und-Adipositas (accessed on 29.09.2020)
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