|If you scroll down to the bottom line you will find that tomato juice is not the only high lycopene tomato product.|
Why? Well if 30 non-obese women lose 1.02 cm off their already relatively slim waists within 8 weeks, while reducing the serum levels of cholesterol, monocyte chemoattractant protein-1 (MCP-1), and thiobarbituric reactive substances and increasing the levels of adiponectin by the mere ingestion of 280 ml of the aforementioned tomato juice, I'd call that intriguing, but in and out of itself still nothing that would make tomato juice a "weight loss miracle".
In contrast to the food intake, which was controlled carefully and shows, as you can see in Figure 1 that the overall intake increased (!) due to the tomato juice, the absence of a control group on an isocaloric beverage is a major downside of the study I would like to mention right away to make sure you don't get overly excited.
|Figure 1: The weight loss was not a result of a simple reduction in energy intake. In fact, the 280ml of tomato juice (39kcal/day) were not the only thing the subjects ate more during the 2 months supplementation phase (Li. 2014).|
|Tomato juices are more than a healthy beverage for the biggest losers. They would also qualify as a highly effective and healthy intra-workout beverage - at least that's what a previously discussed study by Tsitsimpikou. 2013) some of you may remember would suggest | learn more.|
|Figure 2: Changes in waist circumference, body fat (%), cholesterol levels, leptin levels and MCP levels in young (20-30 years) female study participants stratified by "responders" and "non-responders" (Li. 2014)|
"Another unexpected result was that for serum triglyceride levels, which were significantly increased by supplementation, and this effect was seen in responders (body fat change <0), but not non-responders (body fat change ≥ 0)." (Li. 2014)As Li et al. point out, this effect has previously been observed only in subjects with already high triglyceride levels. The levels of the subjects in the study at hand were yet all way below the critical range of >150mg/dL at the beginning and end of the study.
|Figure 3: It's commonly overlooked that activated macrophages (~inflammation) can trigger lipolysis in the adipose tissue (Samuel. 2012).|
Now, the greater reduction in MCP levels in the non-responders suggests that the macrophage activating monocyte chemoattractant protein-1 (MCP-1) was significantly more affected by the provision tomato juice in those subjects who did not lose body weight. Whether this actually is the reason for the lack of fat loss in the non-responders and/or what is behind this difference is yet speculative and not even deal with in Li et al.'s discussion of the results.
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