If you want to know more, you should understand what the ingredients do before you make your decision.
(1) Yerba mate
Mate contains xanthines, which are alkaloids in the same family as caffeine, theophylline, and theobromine, well-known stimulants also found in coffee and chocolate. Mate also contains elements such as potassium, magnesium and manganese. Caffeine content varies between 0.3% and 1.7% of dry weight (compare this to 2.5??“4.5% for tea leaves, and 1.5% for ground coffee).
...yerba mate does contain caffeine, but some people seem to tolerate a mate drink better than coffee or tea. This is expected since mate contains different chemicals (other than caffeine) from tea or coffee.
It is used in popular medicine and employed in commercial herbal preparations as a stimulant to the central nervous system, a diuretic, and an antirheumatic.
Reference
> http://en.wikipedia.org/wiki/Yerba_mate
> http://www.noborders.net/mate/what.html
(2) Cherry stem (stalk)
The cherry stalk is your body's best friend because it is known to help elimination and reduce water retention! It's your dieting companion and an ideal aid for the first phase of any diet. What's more its fruity-woody flavour is a real treat.
Reference
> http://cosmetics.yves-rocher.co.uk/Body-...
(3) Meadowsweet
The whole plant is a traditional remedy for an acidic stomach and the fresh root is often used in homeopathic preparations. It is effective on its own the treatment of diarrhoea. The flowers, when made into a tea, are a comfort to flu victems. Dried, the flowers make a lovely potpourris.
Reference
> http://en.wikipedia.org/wiki/Meadowsweet
(4) Guava
Guavas are extremely rich in vitamin C and are useful sources of calcium, nicotinic acid, phosphorous, and soluble fiber. They are very good for the immune system and are beneficial in reducing cholesterol and protecting the heart.
Guava has been studied as an ingredient in diabetic diets. Protein tyrosine phosphatase 1B (PTP1B) is a potential therapeutic target in the treatment of type 2 diabetes. Leaf extracts of P. guajava inhibited the activity of PTP1B in animal models.
Aqueous extracts from P. guajava have antioxidant or radical-scavenging activity. Most of the activity is associated with the polyphenols however, the guava extracts also contain antioxidants such as ascorbic acid and carotenoids.
Reference
> http://www.drugs.com/npp/guava.html
(5) Black Radish
Its high content of fiber increase peristaltic movements. In addition, it contains large amounts of water. Both water and fiber help our transit and people who suffer from constipation may benefit from this vegetable.
It contains a variety of chemicals that increase the flow of bile which play an important role in the digestion process. Radish help maintain a healthy gallbladder.
Reference
> http://www.dietobio.com/aliments/en/radi...
(6) CLA
CLA has quite pronounced effects on fat loss. This effect has been seen in mice, hamsters, rats, chickens, dogs, and pigs, and in several of these models body fat loss is seen regardless of the type or quantity of dietary fat. However, the degree varies depending on species, strain, age, gender, dosage, duration, and most importantly CLA isomer composition. In a study in mice, 1.5 g/kg resulted in 10% body weight reduction and 70% body fat reduction relative to placebo. Additionally, in mice, it was found that the fat reduction occurs regardless of food intake or fat level, indicating that CLA may be effective even in lean individuals or those in a hypercaloric state.
Reference
> http://www.1fast400.com/i28_CLA.html
I don't think it's dangerous to take them. But please note that it's for you to lose weight not fat. To lose unwanted fat, you still have to do some exercise, eat well with a lot of vegetables and fruit, no junk food, and sleep well.
If in doubt, always ask your doctor FIRST.
^_^ good luck

This is incredibly dangerous and i highly recomend that you do NOT use this product.