Example

An adult female applies a cream once daily to both arms. She uses 2.4 g in one day (2 arms x 3 fingertip units x 0.4 g = 2.4 g). This is 16.8 g per week (7 x 2.4 g).
A 30 g tube should last her two weeks. But if she applies it twice daily (4.8 g/day), the tube will be finished in less than a week (33.6 g/week).

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