How low can your oxygen level go before you die according to the health experts?

Well, talking about this, we can say that the normal oxygen levels of a healthy person should be somewhere around 95. But, if you have lung disease or some other problem, your levels may go down to 90. But, if we talk about how low can your oxygen level go before you die, then to answer this, if your oxygen levels drop to 70, you will start feeling unwell, and if such is the case, you should then consult a doctor immediately.