Why is the consumption of dietary supplements considered risky? a. because they are not officially tested by the government for effectiveness b. because manufacturers label them as natural but put harmful substances in them c. because their use can cause mental problems such as paranoia and irritabilitywhich describes a consequence of steriod abuse? a. javier notices his sense of balance is impaired. b.penny develops severe headaches twice a week. c.john, "mr. calm," starts getting into fights at school.