Why is the consumption of dietary supplements considered risky? because they are not officially tested by the government for effectiveness because manufacturers label them as natural but put harmful substances in them because their use can cause mental problems such as paranoia and irritability

They may be risky because there may be several supplements in that one type of supplement, and you may not need one or more of the ingredients in that supplement. 

Hope this helps!

You did not show us the image of the burger, but i shall try to answer as best i can.  when purchasing food, always consider the ingredients as well as the person who prepared it. consider if they were hygienic people or not, in case the burger was infected with bacteria. no mortal should place an infected burger into their mouth.