Everyone does metabolize alcohol differently, and we all have different philosophies as to whether these things work and if we can trust them. For me, these test strips work consistently with how I have been drinking and how my body feels at the moment of the test.How it worked for me:- 2.5 glasses of wine (about 18 oz) drunken evenly over 1.5 hours (had some cheese and nuts); tested an hour after the last sip - test pad turned light yellow.- 1 glass of wine (about 7 oz) drunken evenly over 1 hour; tested an hour after the last sip - all clean.- 2 glasses of wine (about 15 oz) drunken evenly over 1 hour; tested immediately after - test pad turned brown.- 3 glasses of wine (about 24 oz) from 9:30pm-11:30pm; 1 mixed drink around 12:30am; half a shot around 2am; half a shot around 2:30am. Tested breastmilk around 7:30am - test pad showed scattered brownness; tested again around 10am - all clean.A few things to look out for:- A negative result does not mean that you have no alcohol in your blood/breastmilk; it only means that you have less than 13.1mg/dL of alcohol in your blood.- Read the result at exactly 2 minutes after you saturate the test pad. The result will be very different and invalid if you read it after 2 minutes, say an hour later. For example, one time the test pad turned brown when I was drinking wine, but the same test pad returned to its initial color after half a day.- Either expressing breastmilk onto test pad or saturating test pad in breastmilk will work, but if you choose the former, make sure your breastmilk cover the whole pad; 3-5 drops should work.- The instruction says ANY color change on the test pad indicates more than 13.1mg/dL alcohol in blood, but it didn't say whether a darker color indicates a higher level of alcohol in blood. However, personally, I observed that when I drank more and tested sooner, the test pad turned to a darker color. It could be coincidence, but just something for you to consider.
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