The properties of Rumex, or common garden rhubarb, are various:
Rhubarb root has powerful medicinal properties. The dried rhizome can be used in treating certain intestinal problems and constipation. It has also been used in combination with other remedies for treating cancer: most probably because it is quick and effective in cleaning out the intestines.
Remember that the leaves are extremely poisonous, and must never be used at all. Rhubarb leaves are high in oxalic acid which leaches out calcium and other minerals from the body, leading to bone pain and arthritis in small doses, and perhaps death in larger doses such as might occur from eating just one rhubarb leaf.
Natural Laxative: However, the stems of the rhubarb plant are edible, providing a herbal remedy of a mild laxative nature, and a delicious dessert, while the root of the plant, when dried and powdered, produces a powerful laxative and vermifuge.
Important: Ask your health practitioner or doctor before using rhubarb root. It may not combine with some medicines and so should be used with caution.
Dose For Dried Rhubarb Constipation and Worm Remedy: The dose for the dried rhubarb remedy is very small: you need only take a pinch or two at a time. I find about a 1/4 small teaspoon is perfect, taken just once in the morning, before breakfast, preferably, followed by a cup of coffee or tea or orange juice. It is best to start with a dose even smaller and build up the dose slightly larger in a couple of days if the first effort produces no result.
Note: The rhubarb root remedy should not be used frequently. One dose is usually sufficient, but this could be followed with a second dose if need be within two or three days. Then lay off the rhubarb remedy for at least a week, and take again only when necessary.
To prepare your rhubarb remedy: Wash the freshly dug rhizome carefully. Do not use the rhubarb rhizome if any poisons or weedkillers have been used in the garden, and also be mindful of other contaminants which could be in the soil, such as lead, mercury, asbestos, DDT, or arsenic. If your soil is sick with toxic matter, these poisons will be stored in the rhubarb root.
Rhubarb stems are usually stewed up with chopped apple to make a tasty dessert. Apple and rhubarb crumble is a favourite with my family. (note that arthritis sufferers are advised to avoid rhubarb dessert, as even the edible stems of the plant contain fairly high amounts of oxalic acid.
Generally speaking, it is a good idea when making rhubarb-stem desserts to use high calcium foods, soya milk, dairy milk, and fats such as butter and olive oil, with the dessert. These foods can help reduce the calcium-leaching effect of oxalic acid.