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Patch-Test & New Product Log
Three days on your arm before one day on your face, with the spacing between new products enforced rather than remembered.
Set your spacing rule once: the number of days you leave between introducing new products so that a reaction stays attributable to something. Then one row per new product, with the site picked from a list and Day 1, Day 2 and Day 3 logged from dropdowns. Anything other than Fine and the row says stop and reassess.
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SPACING
The spacing column catches the second new product arriving too soon after the first. That is the failure that wastes a month of everyone's time: two things introduced four days apart, skin objects, and now neither can be blamed or cleared. The sheet flags it while the second product is still in the box. What a reaction means is between you and your dermatologist; this file only ever reports what you logged.
Pairs with

