Traditionally juice diets have been used for detoxification purposes, the principles behind this are straight forward and do make sense, but are only designed for a short period; 2-3 days maximum (often called a juice fast).
By only consuming fresh juices for a period of time you naturally abstain from fats, processed carbohydrates and sugars and substances like coffee and alcohol, as a result, this is extremely beneficial for cleansing the liver and kidneys.
It is believed to that by giving the digestive system a ‘rest’ from the fiber; digestion is easier and nutrients are able to be absorbed more efficiently. Recently many bold claims have been made about prolonged juice fastings, such as disease-fighting, free radical destroying, fat burning, and pain alleviating results. However, these claims are as yet to be supported by any reliable research.
Juice fasting exclusively as a weight loss measure is a short-term solution for a long-term problem that can in some situations complicate matters.
The term ‘juicing’ pretty much means drinking your food, primarily fruits, vegetables, and herbs. Incorporated into a healthy diet juicing is a great way to boost energy levels and consume extra nutrients – my personal favorite is beetroot, celery, carrot, apple, ginger, and mint; perfect for a morning ‘pick me up’.
Weight will certainly be lost when ‘juicing’ however it is unlikely any actual fat will be burnt. Instead, you actually risk losing muscle mass due to the absence of protein in the diet. You also run the risk of slowing your metabolism, meaning when you resume a normal diet, less energy will be burnt and potentially more fat will be stored.
These problems may be combatted by consuming juice more frequently (every 2-3 hours) and balancing your juices by adding protein, either in the form of powder supplements or natural sources such as almond milk or Greek yogurt. Juices can also be surprisingly calorie dense, especially when predominantly fruit. The actual process of juicing fruit and vegetables can also remove some of their natural benefits; of particular concern is the absence of fiber.
If viewed as a short term revitalizing and cleansing fast, juicing can be an extremely positive part of a healthy lifestyle, especially when combined with a balanced diet and regular physical exercise. As a long-term weight loss solution, however, it is a fad diet that cannot and should not be sustained for long periods.
Initial dramatic weight loss may indeed occur, however, little will be done for long-term weight maintenance.
If you do decide to try a juice fast you should consult your healthcare professional first and discuss any individual potential risks. Juicing is not recommended for people suffering diabetes and heart disease nor is it suitable for pregnant or breastfeeding women. Always include a wide selection of fruits and vegetables, washed thoroughly before use and where possible choose organic produce to eliminate concentrated consumption of pesticides, herbicides and fertilizers (particularly in leafy greens).