We know about the good foods, the fruit and vegetables, the grains and the greens that are supposed to fill our plates. And we try to eat them. But often it’s the same old apple, steamed broccoli and salad, meal after meal. That makes eating correctly a chore: it also means you’re denying yourself some remarkable treats. Here are some delectable foods that just happen to be potent medicine.
Asparagus
- A good low- kilojoule source of folate and potassium.
- Stalks are high in antioxidants.
Asparagus provides essential nutrients: six spears contain some 135 mcg (micrograms) of folate, almost half the adult RDI (recommended dietary intake), 545 mcg of beta carotene and 200 mg of potassium. Research suggest folate is key in taming homocysteine, a substance implicated in heart disease. Folate is also critical for pregnant mothers, since it protects against neural tube defects in babies.
Asparagus is low in kilojoules (around 80 in six spears) yet it gives you fibre and important antioxidants such as glutathione. Lightly boiled or steamed, asparagus makes a tasty and nutritious appetizer, salad ingredient or side dish.
Eat asparagus soon after picking. It spoils quickly, and if unrefrigerated it loses half its vitamin C and much of its flavour in just two or three days. If frozen quickly, asparagus retains most of its nutrients.
Grapefruit
- Pink and red varieties contain both beta carotene and lycopene, potent antioxidants.
- High in vitamin C
- Contains potassium
- Low in kilojoules.
- Contains bioflavonoids and other plant chemicals that protect agains cancer and heart disease.
A cup of freshly squeezed grape fruit juice has about 95mg of vitamin C, more than twice the RDI, and most of the other nutrients found in fresh fruit.
Grapefruit is especiallu high in pectin, a soluble fibre that helps reduce blood cholesterol. In addition, recent studies indicate that grapefruit contains other substances that prevent disease. Lycopene, the antioxidant found in pink and red grapefruit, appears to lower prostate-cancer risk. Researchers have not yet identified lycopene’s mechanism of action, but a six year Harvard study involving almost 48.000 doctors and other health professionals has linked ten servings of lycopene rich foods a week with a 45 per cent reduction in risk of prostate cancer.
Other protective plant chemicals found in grapefruit include phenolic acid, which inhibits the formation of cancer-causing nitrosamines; limonoids, terpenes and monoterpenes, which induce the production of enzymes that help prevent cancer; and bioflavonoids which inhibit the action of hormones that promote tumour growth. Some people with rheumatoid arthritis, lupus and other inflammatory disorders find that eating grapefruit daily seems to alleviate their symptoms. This may occur because plant chemicals block the prostaglandins that cause inflammation.
Ne careful though: just as these plant chemicals interact with natural but unwelcome processes in our bodies, they may also disrupt the action of popular medications. The Australian Adverse Drug Reactions Advisory Committee has warned that grapefruit amplifies the effects of common prescription medicines, including many drugs for blood pressure, high cholesterol, sedatives, immunosuppressants, anti-viral drugs and gut medications. Last year the authority upped previous warnings and advised that people taking particular medications should avoid grapefruit and its juice entirely. Please check with your doctor.
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