What substances weaken our bones?

This migraine wont go away and i dont feel safe taking any more medicine for the next few hours

When a freind is not tellig you everything you should a: bug them till they tell you b: ask them polietly to tell you c; stay silent your whole life d leave them they will tell you on there own time

Hot5, endomondo, gympact, and runkeeper are popular a.) energy drinks b.) vigorous-intensity exercise c.) fitness apps d.) moderate-intensity exercise e.) fitness tests