|Here it is: Scientific evidence caffeine is the among the healthiest addictions known to man.|
If you take a look at the study design, you will see that we are dealing with a five-months study with three four-week washout periods, a crossover and two different types of coffee that was tested on two groups.
This sounds more complicated that it actually is. If you take a closer look at the illustration in Figure 1 you will soon realize that there is absolutely no witchcraft involved, here. In fact, the only thing that's magic, were the effects the coffee consumption had on body fat, food intake, satiety and the integrity of the DNA of their 84 healthy, non-smoking, drug-free 20- to 44-year-old male and female (non-pregnant), volunteers with (BMI of 19-26 kg/m²).
|Figure 1: Graphical overview of the study design (Bakuradze. 2014); adherence was controlled by urine essays.|
Regardless of the type of coffee and/or study period, subjects were instructed to prepare their three coffees à day with two of the 7.5 g coffee pods and to consume their freshly brewed coffee in 250ml portions spread relatively evenly across the day ... which yielded the already mentioned benefits (see Figure 1):
|Figure 2: Rel. changes in body fat, fat free mass (incl. bone), serotonine and active grehlin levels (hunger) after 4 weeks on the different coffee brands; data from A |
Ah, and before I forget to tell you. In contrast to what the title of the paper, i.e. "Four weeks coffee consumption affects energy intake, satiety regulation, body fat, and protects DNA integrity" would suggest, there was no significant reduction in energy intake that could explain the fat loss, let alone body-recompositioning effects you can see in Figure 2 (left).
- Haleem, Darakhshan J., et al. "24h withdrawal following repeated administration of caffeine attenuates brain serotonin but not tryptophan in rat brain: Implications for caffeine-induced depression." Life sciences 57.19 (1995): PL285-PL292.