2 slight clean up

# If the half life of Caffeine is ~6 hours, why Why do people consider itcaffeine ineffective after its half-life?

Assuming you take 200mg$$\pu{200mg}$$ of caffeine;caffeine, it's half life is ~6roughly 6 hours.

So after 6 hours there should still be 100mg$$\pu{100mg}$$ of caffeine in your body.

Then why is it generally said that after 6six hours caffeinescaffeine's effect should wear off? Shouldn't it only be diminished since there is still 100mg$$\pu{100mg}$$ of caffeine in your body?

# If the half life of Caffeine is ~6 hours, why do people consider it ineffective after its half-life?

Assuming you take 200mg of caffeine; it's half life is ~6 hours.

So after 6 hours there should still be 100mg of caffeine in your body.

Then why is it generally said that after 6 hours caffeines effect should wear off? Shouldn't it only be diminished since there is still 100mg of caffeine in your body?

# Why do people consider caffeine ineffective after its half-life?

Assuming you take $$\pu{200mg}$$ of caffeine, it's half life is roughly 6 hours. So after 6 hours there should still be $$\pu{100mg}$$ of caffeine in your body.

Then why is it generally said that after six hours caffeine's effect should wear off? Shouldn't it only be diminished since there is still $$\pu{100mg}$$ of caffeine in your body?

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# If the half life of Caffeine is ~6 hours, why do people consider it ineffective after its half-life?

Assuming you take 200mg of caffeine; it's half life is ~6 hours.

So after 6 hours there should still be 100mg of caffeine in your body.

Then why is it generally said that after 6 hours caffeines effect should wear off? Shouldn't it only be diminished since there is still 100mg of caffeine in your body?