I don't know how you ever thought of this but I don't like the sound of it. You can make a cup of turmeric 'tea' -- 1/2 tsp turmeric in hot water. Drink that if you want something for health. Or add it to your rice -- it will be a pretty golden colour. Do things like that. Otherwise, if you really want to do put it in coffee, talk to a dietician or somebody who has the science.

I have several curcuma and globba gingers in pots due to armadillas digging stuff up. They like to eat my ginger bulbs. Anyhow, rihjt before our first freeze, I let the pots totally dry out and when the foliage dries up I clip it off and put the pots in a shed over the winter. It stays above freezing in the shed although Curcuma and Globbas can take some freezing temps. In late April, I take the pots out of the shed and set them in semi shade and water them. Pretty soon they start leafing out. You must just water them a little until they leaf out. You dont want the pots soggy or they will rot. Been doing it this way for about 5 years now :)

I think I found it. I must have gone out and bought some after the sample worked so well. The tube doesn't look familiar, but could easily be different from the way the sample tube looked. It's meant as a dishwasher additive to be used in conjunction with regular dishwashing detergent. The active ingredient listed is Benzoyl Peroxide. I know from unfortunate experience that Benzoyl Peroxide takes color out of lots of things. "Cascade Plastic booster. Plastic cleaning additive. Use regularly to: - Removes red stains and odors" Though turmeric isn't red, I would think this would work on other stains as well. I don't remember if I tried using it NOT in the dishwasher as well as in.

Fsal, that poultice works pretty good for oil stains. I tried it a few years ago on my carrara (before it was properly sealed). made the paste and covered it with a moistened paper towel, and then the plastic wrap. left it for a day or two. it does draw up the oil. you may have to repeat. They also sell these poultices ready-made (search "marble poultice") for stains. ILoveMod quartz is man-made. quartzite is natural. (quartzite is made of natural quartz but it's called quartzite). as for the resin, cheaper quality quartz may use a cheaper resin/materials. The most common yellow stains on any quartz brand countertop are the following; 1) General yellowing to the entire quartz surface due to build up of salts & surfactants 2) Around under mounted sinks - due to salts & surfactants in dish soaps. High pH 3) high use & cleaned area. 4) Under coffee machines 5) under pot plants on the quartz countertop 6) under dish mats or drying mats near the sink 7) under fish tanks. All of the above allow the salts & surfactants to form and generate the quartz countertops causing the yellow or light brown staining. As you will notice that UV light does not generate dish mats, under fish tanks and also pot plants. Whilst UV light can accelerate the yellow staining to white quartz countertops. IT IS NOT THE CAUSE! (they even mention high humidity and relation to salt water as contributing!) Scroll down and read the comment from Quartz Stonecare Cleaning and Restoring Experts https://www.houzz.com/discussions/2467192/quartz-yellowing