I need to lose 20lbs in 4 weeks can you tell me how i can do this thanks?

Plan, Wt Daily, HFLC: Quantity food always 1st issue. Fats: least likely to store as fat, Protein 2nd, Carbs (esp. simple sugars/Fructose) are most rapidly converted to triglyceride fats by liver & stored. Thus plan & track weight daily to 0.1 lb (e.g. Conair WW39), after up & toilet, to see results of previous day while you can remember & review what eaten. Stay active, but food choices & quantities are key. Study!

Weight loss: Unfortunately, it is not realistic to lose 20 pounds in 4 weeks. Over the counter drugs or diet plans promoting this type of rapid weight loss are often associated with compounds that either cause excess fluid loss or removing residual stool from the colon. Effective weight loss is considered to be about 3-5 pounds per month.