I have a creative piece about my visit home to Hawaii in the works, but while that’s in the editing phase, a few photos of awesome goodies from the gardens of Leeward’s Senior Citizen Bowling Crew…
It’s papaya season in da aina and my Gramma’s trees outside are pretty “full on,” as we’d say in Hawaii. They’re much sweeter and softer than the Thai or Indian varieties, and the fact that they grow just outside is pretty damn special. Here are a few more reasons to grind a papaya in the mornings (From WH Foods):
Papayas offer not only the luscious taste and sunlit color of the tropics, but are rich sources of antioxidant nutrients such as carotenes, vitamin C and flavonoids; the B vitamins, folate and pantothenic acid; and the minerals, potassium and magnesium; and fiber. Together, these nutrients promote the health of the cardiovascular system and also provide protection against colon cancer. In addition, papaya contains the digestive enzyme, papain, which is used like bromelain, a similar enzyme found in pineapple, to treat sports injuries, other causes of trauma, and allergies.
Protection Against Heart Disease
Papayas may be very helpful for the prevention of atherosclerosis and diabetic heart disease. Papayas are an excellent source of vitamin C as well as a good source of vitamin E and vitamin A (through their concentration of pro-vitamin A carotenoid phytonutrients), three very powerful antioxidants.
These nutrients help prevent the oxidation of cholesterol. Only when cholesterol becomes oxidized is it able to stick to and build up in blood vessel walls, forming dangerous plaques that can eventually cause heart attacks or strokes. One way in which dietary vitamin E and vitamin C may exert this effect is through their suggested association with a compound called paraoxonase, an enzyme that inhibits LDL cholesterol and HDL cholesterol oxidation.
Papayas are also a good source of fiber, which has been shown to lower high cholesterol levels. The folic acid found in papayas is needed for the conversion of a substance called homocysteine into benign amino acids such as cysteine or methionine. If unconverted, homocysteine can directly damage blood vessel walls and, if levels get too high, is considered a significant risk factor for a heart attack or stroke.
Promotes Digestive Health
The nutrients in papaya have also been shown to be helpful in the prevention of colon cancer. Papaya’s fiber is able to bind to cancer-causing toxins in the colon and keep them away from the healthy colon cells. In addition, papaya’s folate, vitamin C, beta-carotene, and vitamin E have each been associated with a reduced risk of colon cancer.
These nutrients provide synergistic protection for colon cells from free radical damage to their DNA. Increasing your intake of these nutrients by enjoying papaya is an especially good idea for individuals at risk of colon cancer.
Papaya contains several unique protein-digesting enzymes including papain and chymopapain. These enzymes have been shown to help lower inflammation and to improve healing from burns. In addition, the antioxidant nutrients found in papaya, including vitamin C, vitamin E, and beta-carotene, are also very good at reducing inflammation. This may explain why people with diseases that are worsened by inflammation, such as asthma, osteoarthritis, and rheumatoid arthritis, find that the severity of their condition is reduced when they get more of these nutrients.
Vitamin C and vitamin A, which is made in the body from the beta-carotene in papaya, are both needed for the proper function of a healthy immune system. Papaya may therefore be a healthy fruit choice for preventing such illnesses as recurrent ear infections, colds and flu.
Protection against Macular Degeneration
Your mother may have told you carrots would keep your eyes bright as a child, but as an adult, it looks like fruit is even more important for keeping your sight. Data reported in a study published in the Archives of Ophthalmology indicates that eating 3 or more servings of fruit per day may lower your risk of age-related macular degeneration (ARMD), the primary cause of vision loss in older adults, by 36%, compared to persons who consume less than 1.5 servings of fruit daily. In this study, which involved over 110,000 women and men, researchers evaluated the effect of study participants’ consumption of fruits; vegetables; the antioxidant vitamins A, C, and E; and carotenoids on the development of early ARMD or neovascular ARMD, a more severe form of the illness associated with vision loss. While, surprisingly, intakes of vegetables, antioxidant vitamins and carotenoids were not strongly related to incidence of either form of ARMD, fruit intake was definitely protective against the severe form of this vision-destroying disease. Three servings of fruit may sound like a lot to eat each day, but papaya can help you reach this goal. Add slices of fresh papaya to your morning cereal, lunch time yogurt or green salads. Cut a papaya in half and fill with cottage cheese, crab, shrimp or tuna salad. For an elegant meal, place slices of fresh papaya over any broiled fish.
Protection against Rheumatoid Arthritis
While one study suggests that high doses of supplemental vitamin C makes osteoarthritis, a type of degenerative arthritis that occurs with aging, worse in laboratory animals, another indicates that vitamin C-rich foods, such as papaya, provide humans with protection against inflammatory polyarthritis, a form of rheumatoid arthritis involving two or more joints.
The findings, presented in the Annals of the Rheumatic Diseases were drawn from a study of more than 20,000 subjects and focused on subjects who developed inflammatory polyarthritis and similar subjects who remained arthritis-free during the follow-up period. Subjects who consumed the lowest amounts of vitamin C-rich foods were more than three times more likely to develop arthritis than those who consumed the highest amounts.
Promote Lung Health
If you or someone you love is a smoker, or if you are frequently exposed to secondhand smoke, then making vitamin A-rich foods, such as papaya, part of your healthy way of eating may save your life, suggests research conducted at Kansas State University.
While studying the relationship between vitamin A, lung inflammation, and emphysema, Richard Baybutt, associate professor of nutrition at Kansas State, made a surprising discovery: a common carcinogen in cigarette smoke, benzo(a)pyrene, induces vitamin A deficiency.
Baybutt’s earlier research had shown that laboratory animals fed a vitamin A-deficient diet developed emphysema. His latest animal studies indicate that not only does the benzo(a)pyrene in cigarette smoke cause vitamin A deficiency, but that a diet rich in vitamin A can help counter this effect, thus greatly reducing emphysema.
Baybutt believes vitamin A’s protective effects may help explain why some smokers do not develop emphysema. “There are a lot of people who live to be 90 years old and are smokers,” he said. “Why? Probably because of their diet. The implications are that those who start smoking at an early age are more likely to become vitamin A deficient and develop complications associated with cancer and emphysema. And if they have a poor diet, forget it.” If you or someone you love smokes, or if your work necessitates exposure to second hand smoke, protect yourself by making sure that at least one of the World’s Healthiest Foods that are rich in vitamin A, such as papaya, is a daily part of your healthy way of eating.
And part two of this Homegrown Treats special, the biggest avocado I have ever seen:
Ze health benefits of avocados (again, from WH Foods):
What’s New and Beneficial about Avocados
- Consider adding avocado to salads, and not only on account of taste! Recent research has shown that absorption of two key carotenoid antioxidants—lycopene and beta-carotene—increases significantly when fresh avocado (or avocado oil) is added to an otherwise avocado-free salad. One cup of fresh avocado (150 grams) added to a salad of romaine lettuce, spinach, and carrots increased absorption of carotenoids from this salad between 200-400%. This research result makes perfect sense to us because carotenoids are fat-soluble and would be provided with the fat they need for absorption from the addition of avocado. Avocado oil added to a salad accomplished this same result. Interestingly, both avocado oil and fresh avocado added to salsa increased carotenoid absorption from the salsa as well. That’s even more reason for you to try our 15-Minute Halibut with Avocado Salsaa great-tasting recipe that can help optimize your carotenoid health benefits.
- The method you use to peel an avocado can make a difference to your health. Research has shown that the greatest concentration of carotenoids in avocado occurs in the dark green flesh that lies just beneath the skin. You don’t want to slice into that dark green portion any more than necessary when you are peeling an avocado. For this reason, the best method is what the California Avocado Commission has called the “nick and peel” method. In this method, you actually end up peeling the avocado with your hands in the same way that you would peel a banana. The first step in the nick-and-peel method is to cut into the avocado lengthwise, producing two long avocado halves that are still connected in the middle by the seed. Next you take hold of both halves and twist them in opposite directions until they naturally separate. At this point, remove the seed and cut each of the halves lengthwise to produce long quartered sections of the avocado. You can use your thumb and index finger to grip the edge of the skin on each quarter and peel it off, just as you would do with a banana skin. The final result is a peeled avocado that contains most of that dark green outermost flesh so rich in carotenoid antioxidants!
- We tend to think about carotenoids as most concentrated in bright orange or red vegetables like carrots or tomatoes. While these vegetables are fantastic sources of carotenoids, avocado—despite its dark green skin and largely greenish inner pulp—is now known to contain a spectacular array of carotenoids. Researchers believe that avocado’s amazing carotenoid diversity is a key factor in the anti-inflammatory properties of this vegetable. The list of carotenoids found in avocado include well-known carotenoids like beta-carotene, alpha-carotene and lutein, but also many lesser known carotenoids including neochrome, neoxanthin, chrysanthemaxanthin, beta-cryptoxanthin, zeaxanthin, and violaxanthin.
- Avocado has sometimes received a “bad rap” as a vegetable too high in fat. While it is true that avocado is a high-fat food (about 85% of its calories come from fat), the fat contained in avocado is unusual and provides research-based health benefits. The unusual nature of avocado fat is threefold. First are the phytosterols that account for a major portion of avocado fats. These phytosterols include beta-sitosterol, campesterol, and stigmasterol and they are key supporters of our inflammatory system that help keep inflammation under control. The anti-inflammatory benefits of these avocado fats are particularly well-documented with problems involving arthritis. Second are avocado’s polyhydroxylated fatty alcohols (PFAs). PFAs are widely present in ocean plants but fairly unique among land plants—making the avocado tree (and its fruit) unusual in this regard. Like the avocado’s phytosterols, its PFAs also provide us with anti-inflammatory benefits. Third is the unusually high amount of a fatty acid called oleic acid in avocado. Over half of the total fat in avocado is provided in the form of oleic acid—a situation very similar to the fat composition of olives and olive oil. Oleic acid helps our digestive tract form transport molecules for fat that can increase our absorption of fat-soluble nutrients like carotenoids. As a monounsaturated fatty acid, it has also been shown to help lower our risk of heart disease. So don’t be fooled by avocado’s bad rap as a high-fat food. Like other high-fat plant foods (for example, walnuts and flaxseeds), avocado can provide us with unique health benefits precisely because of its unusual fat composition.
This chart graphically details the %DV that a serving of Avocados provides for each of the nutrients of which it is a good, very good, or excellent source according to our Food Rating System. Additional information about the amount of these nutrients provided by Avocados can be found in the Food Rating System Chart. A link that takes you to the In-Depth Nutritional Profile for Avocados, featuring information over 80 nutrients, can be found under the Food Rating System Chart.
- Health Benefits
- How to Select and Store
- How to Enjoy
- Individual Concerns
- Nutritional Profile
Health BenefitsPromote Heart Health
Before reviewing special health areas in which avocados truly shine in terms of their health benefits, it’s worth remembering the big picture. That’s exactly what Victor Fulgoni and his fellow researchers at Nutrition Impact, LLC did when they reviewed data from the federal government’s National Health and Nutrition Examination Study (NHANES 2001-2006) and the dietary intake of 14,484 U.S. adults. Amazingly, only 273 adults participating in this study reported consumption of avocado within the last 24 hours. Amongst the 273 participants who reported recent consumption of avocado, however, nutrient intake was found to be significant higher than other participants for several vitamins (vitamin E and vitamin K), several minerals (potassium and magnesium), and at least one desirable macronutrient (total dietary fiber). Avocado consumers were also determined to be lower in weight and lower in body mass index than non-consumers. Total fat intake, total monounsaturated fat intake, and total polyunsaturated fat intake was higher in consumers of avocado, even though their overall calorie intake was not significantly different from non-consumers of avocado. This nationwide comparison of avocado consumers and non-consumers doesn’t prove that avocado consumers get health advantages from avocado. Nor does it prove that avocado consumption makes us lower in weight. But it does point us in the general direction of viewing avocado as a health supportive food that may give us a “leg up” in terms of health and nourishment.
Wide-Ranging Anti-Inflammatory Benefits
The ability of avocado to help prevent unwanted inflammation is absolutely unquestionable in the world of health research. The term “anti-inflammatory” is a term that truly applies to this delicious food. Avocado’s anti-inflammatory nutrients fall into five basic categories:
- phytosterols, including beta-sitosterol, stigmasterol, and campesterol
- carotenoid antioxidants, including lutein, neoxanthin, neochrome, chrysanthemaxanthin, beta-cryptoxanthin, zeaxanthin, violaxanthin , beta-carotene and alpha-carotene
- other (non-carotenoid) antioxidants, including the flavonoids epicatechin and epigallocatechin 3-0-gallate, vitamins C and E, and the minerals manganese, selenium, and zinc
- omega-3 fatty acids, in the form of alpha-linolenic acid (approximately 160 milligrams per cup of sliced avocado)
- polyhydroxylated fatty alcohols (PSA)s
Arthritis—including both osteoarthritis and rheumatoid arthritis—are health problems that have received special research attention with respect to dietary intake of avocado. All categories of anti-inflammatory nutrients listed above are likely to be involved in avocado’s ability to help prevent osteoarthritis and rheumatoid arthritis. One especially interesting prevention mechanism, however, appear to involve avocado’s phytosterols (stigmasterol, campesterol, and beta-sitosterol) and the prevention of too much pro-inflammatory PGE2 (prostaglandin E2) synthesis by the connective tissue.
Optimized Absorption of Carotenoids
No single category of nutrients in avocado is more impressive than carotenoids. Here’s a list that summarizes key carotenoid antioxidants provided by avocado:
Optimal absorption of these fat-soluble phytonutrients requires just the right amount and combination of dietary fats—and that is exactly the combination that is provided by avocado! Included within avocado are generous amounts of oleic acid, a monounsaturated fatty acid that makes it easier for the digestive tract to form transport molecules (chylomicrons) that can carry carotenoids up into the body. This great match between avocado’s fat content and its carotenoids also extends to the relationship between avocado and other foods. Consider, for example, a simple salad composed of romaine lettuce, spinach, and carrots. This simple salad is rich in carotenoids, and when we eat it, we definitely get important carotenoid benefits. But recent research has shown that if one cup of avocado (150 grams) is added to this salad, absorption of carotenoids will be increased by 200-400%! This improvement in carotenoid absorption has also been shown in the case of salsa made with and without avocado. (That’s even more reason, we think, to try our recipe for 15-Minute Halibut with Avocado Salsa!)
Supports Cardiovascular Health
Avocado’s support for heart and blood vessels might be surprising to some people who think about avocado as too high in fat for heart health. From a research standpoint, however, many metabolic aspects of heart health – including levels of inflammatory risk factors, levels of oxidative risk factors, and blood fat levels (including level of total cholesterol) – are improved by avocado. In addition, we know that heart health is improved by intake of oleic acid (the primary fatty acid in avocado) and by intake of omega-3 fatty acids (provided by avocado in the form of alpha-linolenic acid and in the amount of 160 milligrams per cup). Since elevated levels of homocysteine form a key risk factor for heart disease, and since B vitamins are very important for healthy regulation of homocysteine levels, avocado’s significant amounts of vitamin B-6 and folic acid provide another channel of heart support.
Research on avocado and heart disease remains in the preliminary stage, with studies mostly limited to lab studies on cells or animals fed avocado extracts. But we fully expect to see large-scale human studies confirming the heart health benefits of this unique food.
Promotes Blood Sugar Regulation
One of the most fascinating areas of avocado research—and one that may turn out to be the most unique for health support—involves carbohydrates and blood sugar regulation. Avocado is relatively low-carb food, with about 19% of its calories coming from carbs. It’s also a low-sugar food, containing less than 2 grams of total sugar per cup, and falls very low on the glycemic index. At the same time, one cup of avocado provides about 7-8 grams of dietary fiber, making it an important dietary source of this blood sugar-regulating nutrient. Given this overall carb profile, we would not expect avocado to be a problematic food for blood sugar unless it was eaten in excessive amounts (many cups per serving).
Within its relatively small carb content, however, avocado boasts some of the most unusual carb components in any food. When it is still on the tree, avocado contains about 60% of its carbs in the form of 7-carbon sugars. In sizable amounts, 7-carbon sugars (like mannoheptulose, the primary carb in unripened avocado) are rarely seen in foods. Because of their rare status, food scientists have been especially interested in the 7-carbon sugars (mannoheptulose, sedoheptulose, and related sugar alcohols like perseitol) found in avocado. The 7-carbon sugars like mannoheptulase may help regulate the way that blood sugar (glucose) is metabolized by blocking activity of an enzyme called hexokinase and changing the level of activity through a metabolic pathway called glycolysis. Research in this area is still a long way from determining potential health benefits for humans from dietary intake of these 7-carbon sugars. But it’s an exciting area of potential health benefit for avocado, especially since this food is already recognized as low glycemic index.
One final interesting observation comes from this research on avocado and its carbs: after five days of ripening (post-harvest, beginning with removal of the avocado from the tree), the carb profile of avocado changes significantly. The 7-carbon sugars change from being the predominant form of carbs in avocado (60%) to being an important but minority component (between 40-50% of total carbs). With ripening, the 5-carbon sugars—especially sucrose—become the predominant carbs. While it’s too early in the research process to draw health-oriented conclusions from this information, these findings may be encouraging us to consider degree of avocado ripeness as an important factor in its health benefits. We already know to stay away from an extremely overripe avocado that has become overly soft and has developed dark sunken spots on its skin. Perhaps off in the future, we’ll be able to zero in on exact amounts of avocado ripeness that offers different types of unique health benefits, including carb-related benefits.
The ability of avocado to help prevent the occurrence of cancers in the mouth, skin, and prostate gland has been studied in a preliminary way by health researchers, mostly through the use of lab studies on cancer cells or lab studies involving animals and their consumption of avocado extracts. But even though this anti-cancer research has been limited with respect to humans and diet, we believe that the preliminary results are impressive. The anti-cancer properties of avocado are definitely related to its unusual mix of anti-inflammatory and antioxidant nutrients. That relationship is to be expected since cancer risk factors almost always include excessive inflammation (related to lack of anti-inflammatory nutrients) and oxidative stress (related to lack of antioxidants). But here is where the avocado story gets especially interesting. In healthy cells, avocado works to improve inflammatory and oxidative stress levels. But in cancer cells, avocado works to increase oxidative stress and shift the cancer cells over into a programmed cell death cycle (apoptosis), lessening the cancer cell numbers. In other words, avocado appears to selectively push cancer cells “over the brink” in terms of oxidative stress and increase their likelihood of dying, while at the same time actively supporting the health of non-cancerous cells by increasing their supply antioxidant and anti-inflammatory nutrients. We look forward to large-scale studies in this area involving humans and dietary consumption of avocado.