I mentioned in a comment yesterday that I've been taking two or three charcoal capsules a day since I became ill on Thursday. Here's what they look like. These particular ones, which I think I bought at the pharmacy, contain equal amounts of powdered charcoal (charbon) and brewer's yeast (levure).
Supposedly, the charcoal prevents the absorption of toxins into the body by absorbing them first. The charcoal is recommended to relieve the symptoms of food poisoning and also to prevent flatulences, bloating, and heartburn. I really don't know how effective the charcoal is, but it's been recommended to me by friends and pharmacists, so I take it.
There's an article in English here about this kind of "activated charcoal" product. The label on the product I'm taking (photo above) is that the instructions say to take two capsules a day, either before or after a meal, with a large glass of water.
The suspicious thing is that it goes on to say you that to prevent gas you can take as many as 10 capsules 30 minutes before and after a meal. I don't know if that means you can take a total of 10 capsules, or 20. The it advises you not to exceed the prescribed daily dosage. Comprend qui peut. On this page in French, toward the bottom, I read that « Pour contrer une gastro-entérite : 4 à 8 gélules par jour, jusqu'à disparition complète des troubles intestinaux. » I'm not taking that many, but then my troubles intestinaux are still with me.
I'm doing better than I was a couple of days ago, but I'm still experiencing some symptoms of the oyster contamination. I ate three small meals yesterday — including a small bowl of grits (polenta) for breakfast. I had a bowl of turkey-barley soup for supper. All of it went down well and stayed down. I haven't been out of the house since last Wednesday.