Great Question! SwellNoMore is a natural supplement and the ingredients have natural diuretic and anti-inflammatory properties that can help reduce swelling and inflammation fast. Many people see results within the first few days, first week or two of taking SwellNoMore. That is why SwellNoMore is the best supplement for edema. That being said, people can have different causes of swelling, so it really depends on the level of edema and/or swelling that is occurring, what is causing it, and how long it has been going on. While most people do see rapid results, we recommend you give it at least 3-4 weeks for maximum effect. People with severe edema or swelling may need to try the SwellNoMore supplement for up to 6 weeks.