"How often should you drink/ingest it ? once a day or more ?"
I've been taking it twice a day, 1 tablespoon with 10 ounces of water. Once 1/2 hour before breakfast and once 1/2 hour before supper. I drink it from a straw to keep it away from my teeth to help protect tooth enamel. And then I swish my mouth with water afterwards. I take it as a digestive aid, but it definitely suppresses my appetite and I've lost weight. I think my skin looks better too. I've been using the Heinz brand from Walmart, which isn't processed so it still has the "mother", so shake the bottle before using it - $4.24 for a 32 oz. bottle. Don't get the cheap processed kind; you can tell it's processed because it's completely clear. Braggs uses organic apples so it is much more expensive.