STEP 1/7
After peeling the onion, put a drop or two of vinegar in water and soak it for 5 to 10 minutes.
If the onion skin doesn't peel well, soak it in water and peel it.
STEP 2/7
Remove moisture from onion skin by mixing it in an air fryer or frying pan
STEP 3/7
Wrap it in a kitchen towel and wrap and refrigerate it.
STEP 4/7
When the onion skin is dry, put it in a storage container and refrigerate it.
If you dry a large amount of onion skin, put it in a storage container and store it.
The skin of only three onions is enough to boil at a time, so you can boil it right away without having to store it.
STEP 5/7
When it boils with onion skin and water, lower it over low heat, cover it, and boil it for 30 minutes to an hour as if it is boiling.
STEP 6/7
Don't worry about the amount of water, and if it's too boiled down, you can add more water.
STEP 7/7
Pour hot water into the onion peel extract and drink it.
I boiled it for an hour without pouring water, and it tasted really strong and bitter, so I diluted it with hot water and drank it.
Quercetin tastes bitter. That's why quercetin comes out well when it tastes bitter.Make sure to boil for at least 30 minutes.