First of all, the ad seems to appeal to people who want to loss weight by its choice of word and statistical data. The ad also has a bar graph that seems to refers to the phrase "Losing up to 58 pounds in 3 month". The ad didn't even seem to have a sample.
The advertisement claims that the product reduce calories by 50 percent or 1600 cals leading to an average of 3200 cals of an average human according to this advertisement. According to healthyeating.sfgate.com, the average caloric intake is 2,640 cals for men ages 19 and above and 1,785 cals for women the same age. Since average cals intake never even reach 3000 cals, this causes it to be biased.
According to zoeharcombe.com, 1 pound of fat is about 2,843-3,752 cals which leads to the fact that you need to lose about 164,894-217,616 cals to lose about 58 pounds. This contradicts with the phrase "1600 cals a day" since if you use this for 3 months, then you'll just lose about 144,000 cals. This proves that data is just to appeal to you.
Graph seems to missing the y-axis and a title. This makes the graph more inaccurate since its lacking alot of information needed. They never even told us how they got their data or what was their sample so this it could've been tested on anything like a dog, a cat, etc.
Let's have a recap, the advertisment have incorrect average, it was playing with words, no sample, and the graph had missing information or errors. Judging by the advertisment, I suggest you don't bother buying this product.
Sources:
http://www.directhealthpharmacy.com/phentramin-d.html
http://www.zoeharcombe.com/the-knowledge/1lb-does-not-equal-3500-calories/
http://healthyeating.sfgate.com/average-calorie-intake-human-per-day-versus-recommendation-1867.html
