As it is high in the red pigment betanin, beetroot has a strong protective effect. The ancient Egyptians recognised the healing powers of the celery root. The Indians and Romans also valued the detoxifying effects of the strongly scented tuber. Celery found its way to Europe in the 8th century AD. Carrots contain more beta-carotene than any other vegetable. The body converts this into vitamin A, which has a strengthening effect on the eyes. This also protects the cells against free radicals. Two carrots a day are enough to meet your daily requirement.