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    • Eat Right and Keep You Cool

      LOS ANGELES, Jun 30, 2010 (BUSINESS WIRE)

      The Herbalife Family Foundation (HFF) has established a Casa Herbalife program in Taloe, a rural city in the Krasnoyarsk region of Russia, to help an orphanage renovate its kitchen and serve healthier meals to the 20 children in its care.

      Taloe Orphanage was established in 2002 to providechildren in the rural area with safety, security, educational services and

      the opportunity for social rehabilitation. Since it opened, more than 100 children have been adopted.

      This is the 20th Casa Herbalife program to open in Herbalife's EMEA (Europe, Middle East and Africa) region and the 53rd program worldwide. After an initial grant from HFF, local Herbalife independent distributors and employees will support the program through volunteerism and fundraising. In 2009, HFF helped feed more than 14,000 children around the world through its global family of Casa Herbalife programs.

       
      Breakfast of Champions
      By Susan Bowerman, MS, RD, CSSD

      While most people wouldn’t consider skipping lunch or dinner very often, a lot of us in fact think nothing of trying to power through the morning on an empty stomach. People skip breakfast for a variety of reasons – they claim they’re not hungry, they don’t have time, they don’t like breakfast foods, or they’re trying to lose weight. If you’re a breakfast-skipper and still not convinced that it’s important, read on.

      It’s true that some people just aren’t that hungry in the morning.  Many people feel like their stomachs take a while to ‘wake up’.  Even though your stomach may not send you strong signals in the morning, if you skip breakfast, your muscles and brain will certainly protest.  Working muscles and an active mind require plenty of healthy carbohydrates to keep them functioning properly.

      Our bodies require the right carbs – fruits, vegetables and whole grains - as our primary fuel source.  Taking in these ‘good’ carbs in the morning can help keep blood sugar levels from lagging and fuel the activity of your brain and muscles.  And the right proteins in the morning give the meal staying power and help you stay alert and productive until lunch.

      A breakfast consisting of only refined carbohydrates and little protein– like gimbab for example– is short on  the ‘good carbs’ that fruits, vegetables and whole grains provide and doesn’t provide enough protein to keep you fueled for very long.   If you’re not that hungry in the morning, try something like a dish of yogurt and some fruit, or a protein shake made with milk or soy milk, protein powder and fruit.  Or, have a glass of milk and a piece of fruit with your gimbab.  The carbs in the milk and fruit will fuel your muscles and brain, and the protein will keep you satisfied until lunch.

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      With all the quick breakfast options out there, lack of time shouldn’t stop you from eating in the morning.  Try to avoid a drive-through detour or a grabbing something at your local coffee house – most of the time the food choices there are limited, and are likely to be high in fat and sugar as well as low in fiber.  Instant whole grain hot cereals, protein-packed energy bars or smoothies that can be eaten at your desk are all good options if you’re rushed.   Make a point to carry fruit with you or keep some at work to round out the meal.

      If you don’t like breakfast foods, then eat whatever appeals to you.  There’s no rule that says you can’t eat last night’s leftovers for breakfast.  Try a turkey sandwich packed with vegetables on whole grain bread or some leftover chicken, brown rice and veggies – both meals will provide a good balance of protein and carbohydrate.  Add a piece of fruit (or save for mid-morning) and have a glass of nonfat milk and you’ll be good to go until noon.

      Think skipping breakfast will help you lose weight?  Think again.  People who skip meals tend to get very hungry and over-indulge at the next meal, so there’s really no overall reduction in calories over the day.  You’ll be much better off if you spread your calories out over a few small meals and one or two healthy snacks.  Have some protein each time you eat – egg whites, fish, poultry breast, nonfat dairy products and soy products are good choices – so you’ll feel fuller longer.  And try to include foods that have a high water content – like whole fruits, veggies, salads and vegetable-based soups – they’re nutrient-rich and can help fill you up, not out.

      If time is an issue – and even if it’s not – a protein-rich meal replacement shake is also one of the best ways to start the day.  The combination of protein powder, calcium-rich milk or soy milk plus fruit is a quick and nutritious way to start to the day.

      And here’s a message for those who grab a muffin and a coffee drink on the way to work: a nutrient-packed meal replacement drink made with milk and fruit has less than 250 calories, but a sweetened coffee drink and a muffin could cost you more than 1,000 calories.   A detour to the drive-through for a breakfast sandwich could easily set you back 500 calories and dump more than two tablespoons of grease into your system.

       
      8 Ways to Make your Diet Better – Today!
      By Susan Bowerman, MS, RD, CSSD

      If your diet is filled with fast food, devoid of fruits and veggies, or composed of a series of unplanned quick meals or snacks, it’s in serious need of an overhaul. But where do you start?

       When your diet isn’t as good as it could be, it can be overwhelming to think about how to make all the changes you know you should.  But a few small changes over the course of the day can make a huge difference in the overall quality of your diet.

      Think about your typical diet – the foods you eat day in and day out - and target just one change.  Just ditching soda in favor of water at one meal, for example, can cut at least 150 calories and about 10 teaspoons of sugar out of your day.

      The goal is to base your diet on lean proteins, fruits, veggies and whole grains, and to find healthier items to replace the high-fat, high-sugar stuff.  Here are eight simple things you can do – today– to vastly improve your diet.  Practice these changes long enough, and they’ll soon become a part of your regular routine.

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      • Have a piece of fruit for dessert – If you crave something sweet at the end of a meal, lose the cakes and cookies and reach for a piece of fresh fruit instead.  Fruits are loaded with fiber and antioxidants - not to mention a host of vitamins and minerals – and are satisfyingly sweet and juicy.
      • Switch from white bread to 100% whole grain.  Try some whole grain bread instead of the usual white bread for sandwiches or toast – it’s an easy way to up your fiber intake.  Most restaurants and sandwich shops offer whole grain breads, too.
      • Eat breakfast.  Skipping breakfast can leave you lagging in the morning, and studies show that breakfast eaters have an easier time maintaining their weight than those who skip.  If you’re on the go,  try a protein shake, a single-serve yogurt or cottage cheese, or a stick of lowfat mozzarella cheese and a slice of whole grain toast.  Add a piece of fruit and you’ll be good to go until lunch time.
      • Double up your veggies at dinner.  At home, fill at least half your plate with veggies and salads.  When you’re in a restaurant, ask if you can swap the starch for an extra serving of veggies, or have extras added to a sandwich.  Vegetables are ‘nutrient dense’ – providing tons of nutrition at a very low calorie cost.
      • Snack on a handful of walnuts, almonds or soy nuts.   Chips and pretzels may satisfy your craving for something crunchy and salty, but they offer little nutritional value.  Get a dose of healthy fat and some hunger-fighting protein from a handful of nuts or soy nuts instead. @@@
      • Drink water with lunch and dinner.  Sugary beverages like soda, sweetened tea or lemonade dump a lot of calories into your system.  Try having plain or mineral water instead.  A squeeze of lemon or lime adds refreshing flavor.
      • Have one calcium-rich food – whether it’s a glass of nonfat milk, a scoop of cottage cheese, a carton of yogurt or a stick of string cheese, dairy products are great sources of bone-building calcium.  Can’t tolerate milk products?  Many soy milks, cheeses and yogurts are calcium-fortified.
      • Try some seafood.  Fish contains healthy omega-3 fats, yet it’s low in calories and high in protein.  Canned tuna can be mixed with mashed avocado for a healthy sandwich spread, or tossed over some prewashed salad greens for a quick meal.  If you lean towards red meat or chicken when you eat out, next time try some grilled fish or shellfish instead.
       
      Phytonutrients: Good for the Plant, Good for You
      By Susan Bowerman, MS, RD, CSSD

      Mother nature knows that we use all of our senses to select our foods – her bounty provides us with an incredible array of beautiful, fragrant and tasty foods and herbs. In times past, this was a way that nature ensured that our hunter-gatherer ancestors would get enough to eat – by making nutrient-rich plants as appealing as possible.

      We’re still naturally drawn to bright colors, delicious flavors and wonderful aromas found in an appealing plate of food or an aromatic cup of tea. But beyond their sensory appeal, foods and herbs contain thousands of phytonutrients - natural plant compounds that have far-reaching effects on our health.

      These phytonutrients come in many forms. Some are the natural pigments that give plant foods their beautiful hues, while others– like sulfur compounds in onions or garlic – are responsible for strong odors and flavors.

      While these phytonutrients make plants pretty to look at or delightful for us to eat, many of them serve to protect the plant from heat, sunlight or pests. When we consume fruits, vegetables and herbs, the phytonutrients they contain then work to help keep us healthy, too.

      Many phytonutrients act as powerful antioxidants. Oxidation is a process that occurs in the body naturally - as part of everyday metabolism and exposure to air and sunlight. Oxidation needs to be kept in check, since too much oxidative stress on the body can cause damage to body cells and tissues.

      @@@

      Just as humans can suffer from the sun’s damaging rays, plants need to protect themselves, too. As tomatoes ripen in the heat of the sun, for example, the fruit produces more and more lycopene – the pigment that not only gives tomatoes their deep red color, but also acts as an antioxidant to protect the plant from harmful ultraviolet rays. When humans eat tomatoes – or any other antioxidant-rich fruit and vegetable for that matter - they reap similar benefits. The lycopene and other antioxidant phytonutrients in the tomato help to protect the body’s cells by bolstering the body’s antioxidant defense system.

      Not all phytonutrients are colorful. Others have strong odors - like the strong-smelling glucosinolates that are found in cabbage family foods like broccoli, cauliflower and horseradish – that help keep the plant healthy by deterring pests. When we eat them, these same compounds keep us healthy by helping to break down and detoxify potentially harmful substances. Other fragrant plant foods – like herbs, spices and teas - are rich in phytonutrients, too.

      The diversity of plant foods - and the unique makeup of each herb, spice, tea, fruit or vegetable - supply us with literally thousands of these beneficial, health-promoting phytonutrients in the diet.  So it’s not just eating more servings that matters, but eating a wide range of plant foods, too.

      And, when you can, mix your plant foods together in the same dish or meal.  There is some evidence that when eaten together, combinations of plant foods -  like a mixed fruit salad or a spicy vegetable curry - might deliver an even a stronger antioxidant punch than when these foods are eaten alone.

       
      What Makes Us Overeat?
      Luigi Gratton, M.D., M.P.H.
      Vice President, Medical Affairs and Education
       
       
       
      Most of us would like to think that we’re in charge of how much we eat. We trust our bodies to tell us when we’re full, and that after we’re done, we have a good sense of how much we’ve eaten.
       

      If only it were true. “Research tells us that subtle cues in our environment can pressure us to dish up more than we need and eat more than we should,” said Luigi Gratton, M.D.,
      vice president of medical affairs at Herbalife. “Larger plates –  even larger serving utensils – can prompt over-consumption.” In a self-serve ice cream experiment1, people given large bowls and scoops doled out 57 percent more ice cream than those given smaller dishes and serving utensils.

      @@@

       
      So, how much we’re going to eat is generally decided before we even take that first mouthful. The reality is we pretty much eat whatever we’re served – whether it’s a little or a lot. From a supersized fast-food meal to a dainty portion in an upscale restaurant, we’re generally satisfied as long as we’ve polished off every morsel. Rather than letting our stomachs decide, we let an empty plate signal an end to the meal.
       

      Controlling how much you put on your plate really becomes the first step in controlling how much you put in your stomach. But other cues can trigger overeating, too. Just smelling or seeing food – anything from the smell of fresh-baked bread to the sight of stale donuts in the company lunchroom – can trigger your desire to eat, even if you’re not hungry.  Here are some ways to take charge:

      @@@

      • Think spoon, not shovel - It’s an old trick, but it really works - using smaller plates and tall, skinny glasses gives the illusion that there is more food on the dish and more to drink in the glass. Smaller serving utensils help keep you from loading up, too – think spoon, rather than shovel.
      • Single-serving sizes - As serving containers get larger, so do portions.  Those huge bargain-priced cereal boxes may be leaner on your wallet, but studies show you’ll pour yourself a lot more cereal– as much as 20 percent more – than you would from a regular-sized package.  Go for the single-serving sizes.
      • Out-of-reach sweets - Make it inconvenient to eat the unhealthy stuff. You may not make the effort to bake brownies from scratch when the mood strikes, but if you keep the microwavable version around you’ll have to constantly fight the urge. Get the candy dish off your desk and the cookie jar off the counter – set out a bowl of fruit instead.
      • Mix it up, but not too much - Studies show that the more variety on your plate, the more you’ll eat – all that stimulation keeps your taste buds in high gear. An array of low-cal fruits and veggies is fine, but when faced with a buffet or a dinner served family-style, limit yourself to just a couple of items on your plate at one time. 
      • Shake it up - Try a protein shake for breakfast or lunch. Made from a set amount of milk, protein powder and fruit, it’s a natural when it comes to portion control. Add some ice cubes, and whip it up to increase the volume without adding calories – and enjoy from a tall glass.
       
      肥胖的危害和饮食控制

      孙建琴教授,现任中国营养学会理事、老年营养分会主任委员、上海市营养学会副理事、临床营养专业主任委员、复旦大学附属华东医院临床营养中心主任,复旦大学医学院临床营养硕士研究生导师。主持国家自然科学基金、市科委、国际合作研究项目多项,在国内外杂志发表论文数十篇,参与编写营养专业书10多本。长期从事医学营养学的医疗-教学-科研-预防工作,主攻方向为营养与慢性病防治研究,包括糖尿病、肥胖、高血压、高脂血症、肿瘤等。擅长各类人群的营养与健康评估指导,营养不良与营养过剩的防治,各种疾病的营养治疗。
       
      众所周知,很多健康问题都与饮食息息相关,肥胖也不例外。产生肥胖呢的主要原因是饮食平衡被打破了——我们吃进去的能量比消耗的多,多余的能量就储存在身体当中,变成脂肪。而脂肪通常会储存在肚子、脸、手臂、腿等地方。
       
      肥胖对于健康有很多危害,可以说是万病之源。肥胖人群的糖尿病、高血压、高血脂等心脑血管疾病的得病率和因心脏问题猝死的几率要远高于正常人群,而患有两种或以上上述疾病的患者则可以被视为患有综合代谢症。内脏脂肪堆积以后,会放出一些危险的细胞因子,这些因子随循环系统遍布全身,导致糖尿病、高血压、高血脂等病症。另外,也会使我们的免疫功能变得越来越弱,从而削弱对传染性疾病的抵抗力。例如针对最近的H1N1甲流,就有专家指出,肥胖人群的感染率及致死率可能要高于普通人群。另外,国际研究表明,肥胖人群的预期寿命平均缩短3到7年。
      @@@
      如何判断是否肥胖?
      如果从客观指标来判断肥胖的话,体重是最好的判断方法之一。理想体重,即所谓的标准体重,就是身高减去105,加减10%内都是正常范围。超过10%视为超重,超过20%视为肥胖。所以肥胖和超重是有两个界限的。比如,身高160厘米,标准体重就应该是160减去105,即55公斤。浮动10%范围.也就是说55公斤减5.5公斤,就是49.5~60.5公斤以内。不是说胖一点的人都叫肥胖,只有脂肪超过一定的程度才叫肥胖。另一个可以判断的指标就是体质指数,也叫BMI。计算方法就是用你的体重(公斤)除以身高的平方(米),18.5~24的范围以内都是正常的。24~28是超重,大于28就是肥胖。
       
      常见的肥胖有两种类型:第一种叫梨型肥胖,就是上半身比较正常而下肢尤其是腿部、臀部壮硕;第二种肥胖叫苹果型肥胖,好像在肚子这里带了一个救生圈的样子,亚洲人的肥胖大多数都是这种肥胖。这两种肥胖中苹果型肥胖更危险。苹果型又叫中心型肥胖,体内脂肪堆积在腹部。它使慢性病发生的危险度增加,与心血管疾病、糖尿病、老年痴呆、肿瘤等等都有非常密切的关系。
       
      针对中心型肥胖,现在比较推行以腰围作为判断标准。以中国人的标准来算,男性保持在腰围在85公分以下,女性保持在80公分以下是一个比较理想的尺度。
      @@@
      减肥的全球策略
      肥胖已经是世界性的问题,一些西方国家已经意识到问题的严重性而采取措施加强控制,而在中国和印度这样经济快速增长的发展中国家,肥胖的趋势也在加速增长。在全球,预防肥胖的通行策略就是,少吃多动——“迈开腿,管住嘴”。多动可以燃烧脂肪,使胰岛素敏感性增加,血糖水平降低,也可以使血脂降低。少吃指的是少吃不良食品。比如:不要多喝碳酸饮料、含糖高的饮料、食品,多喝不含糖的水或茶。但知易行难,能够长期坚持就难上加难了。所以要从意识上去改变,从生活点滴改变。
       
      体重控制主要通过饮食达到。一个总的原则就是我们吃进去的能量要等于或少于我们需要的,让我们身体把多余的脂肪转化作能量使用,这样我们才能减去多余的脂肪。所以要吃的少一点,动的多一点。但是,饮食控制减肥也要得法得当,一些常见的不正确的观念包括:减肥光吃蔬菜和水果,不吃饭;减少蛋白质的摄入以为能帮助减肥;认为冷藏食物、饮料要消耗热量;以为晚上节食,会加速减肥等,这些都是不正确的。减肥需要的是一种低能量、低脂肪、含丰富维生素和优质蛋白质的均衡营养饮食。
      @@@
      代餐减重的好处
      近年来,比较推荐的科学饮食控制法是膳食的替代,也叫代餐。在2005年《欧洲临床营养学杂志》上也综述了一些膳食替代的方法对减肥和糖尿病和心血管疾病的作用。膳食代餐确实是一个比较好的方法。在国际上也把代餐作为一个对抗全球肥胖的一个重要策略来施行。欧洲国家通过对四十位减肥者长达一年的研究发现,以代餐来减肥和传统的饮食计划来比较,代餐可以更有效地减轻体重,并且发生反弹的几率也比较小。
       
      代餐的来源选择广泛,比如粗制的谷物、大豆蛋白和乳清蛋白。目前国际上认可的以大豆蛋白为主的代餐是一个比较理想的选择。大豆本身就是一种健康食品,蛋白含量很高,膳食纤维很多,还含有抗氧化、保护心血管的物质。2003年《欧洲临床营养学杂志》刊登文章比较了大豆蛋白对于血脂的影响,发现用大豆蛋白代餐可以降低总的胆固醇和低密度脂蛋白(这两个胆固醇会导致动脉粥样硬化),同时腰围也显著地下降。
       
      另外,大豆当中的皂甙,可以促进脂肪的分解代谢,有益于减肥。大豆纤维,也是膳食纤维,可以软化粪便,促进排便通畅,缓解便秘,并减少肠道对脂肪和一些有害、有毒代谢产物的吸收。大豆本身含的有效成分很多,但是其中一大部分都是水溶性的。如果经过重重工序做成豆腐后,大部分都流失掉了,而在大豆蛋白粉当中保留得比较好,所以通过大豆蛋白粉这一类食品来补充大豆中的营养物质是一个很好的选择。
       @@@
      减肥也要注意速度
      健康的减肥应注意控制速度。快速减肥非常有害身体健康,会造成两方面的问题。一方面,不正确地减肥,短期中体重快速地下降可能是因为体内水分的流失。水分是血液和细胞内液重要的组成部分。体液大量流失会影响健康。另一方面,在减肥过程当中不科学的快速减肥,如果没结合健康的生活方式,比如适当运动、作息,反弹是很厉害的。事实上,减肥不一定马上要下降到理想体重,一般认为在半年左右减掉初始体重的5%到10%就可以了,最终目标是能够使你的健康得到改善。所以选择正确的饮食控制方法,结合健康的生活方式,才是健康减肥的根本。
      (本文章内容仅代表专家观点)
       
      益生元与人体健康

      赵法伋教授现任中国营养学会荣誉理事、顾问,上海市营养学会名誉理事长,上海市预防医学会名誉顾问,第二军医大学教授、博士生导师。

       

       

       

       

      随着人们生活水平的提高,越来越多的益生元和益生菌产品进入了我们的日常食品采购单。到底什么是益生元和益生菌?它们对健康到底有什么作用呢?中国营养学会顾问、上海市营养学会名誉理事长、第二军医大学赵法伋教授为大家揭开了益生元的神秘面纱。
      为让大家有清晰的认识,赵教授先从益生元生存的人体环境说起:“被喻为‘生命通道’的肠道内栖息着总数约100兆个、种类在100种以上、重达1公斤的各种细菌,其中包含着很多能促进健康的益生菌。而益生元(prebiotic)、益生菌(probiotic)、合生元(symbiotic)都是微生态制剂,可以调节肠道内菌群平衡,维护肠道健康。肠道健康还对增强免疫、预防多种慢性病,乃至延缓衰老等都有重要作用。”
      @@@
      不是所有的肠道菌群都是有益菌,赵教授进一步指出,根据对人体的影响,细菌可分为有益菌、有害菌和中性菌三大类。有害细菌包括能致病和能产生有害物质的细菌,如大肠杆菌、变形杆菌等。有益细菌以双歧杆菌和乳酸菌为主。如果人体肠道内有益菌占优势,人体就会表现出健康状态,特别是胃肠道就会处于一种舒适状态。双歧杆菌是人和动物肠道内的有益菌,能形成一个具有保护作用的生物膜屏障,阻止有害菌的入侵与定植,从而抑制外源致病菌和肠内固有的腐败细菌的生长繁殖,改善肠道内菌群结构与环境,具有提高免疫力、预防和治疗便秘及腹泻、降血脂、抑制肠道病源和腐败微生物的生长,分解致癌物质等作用。因此,保持和促进双歧杆菌优势和生长是促进人体健康的重要手段。
      国际上将作为营养保健食品给消费者服用的活菌称为“益生素”。“益生素”是指通过改善宿主肠道微生物菌群的平衡而发挥作用的活性微生物制品。目前最大的问题是益生素并只能短暂地存在于宿主体内,一旦停止服用,结肠内益生素的优势也就不存在了。为解决“益生素”的不足,科学工作者研究发现了能促进有益菌在肠道生长繁殖的食物,并称之为“益生元”。
      “益生元”是指不被消化的食物成分,这种成分能有选择地刺激一种或几种结肠中对宿主健康有益的微生物的生长和繁殖,从而改善肠道微生态环境,促进机体健康。通常将不被消化而在结肠中可以被微生物利用的食物,尤其是功能性低聚糖,作为能促进双歧杆菌生长的因子,称之为“双歧因子”。健康婴幼儿肠道内双歧杆菌数量较高,而中老年人较低。据调查,在我国长寿老人体内,双歧杆菌的含量就比普通人要多得多。目前,要保持双歧杆菌数量优势的方法有二:一种是直接食用含有活双歧杆菌的产品;另一种是食用能够促进体内双歧杆菌增殖的功能性食物“益生元”。前者制造工艺复杂,同时活菌通过胃比较容易失活;而后者食用方便,不存在这种难题。于是,作为益生元的功能性低聚糖得到了迅速发展。主要有:低聚半乳糖(galactooligosaccharide)、低聚果糖(fructooligosaccharide)、低聚异麦芽糖(isomaltooligosaccharide)、低聚麦芽糖(maltooligosaccharide)、大豆低聚糖(soybean oligosaccharide)、低聚木糖(xylooligosaccharide)、帕拉金糖(Palatinose)、乳果糖(1actulose)、海藻糖(trehalose)等。@@@
      功能性低聚糖是最重要的益生元,但严格讲并非所有低聚糖都是益生元,新近的说法是必须符合以下三个条件:①抗胃酸、抗哺乳动物酶的水解和胃肠道的吸收;②被肠道菌群发酵;③选择性地刺激对健康有益的肠道细菌的生长和/或活性,这点是最难满足的。证明益生元功效的试验必须最终在生物体内完成,即通过目标生物(包括人或动物)适当的营养干预试验,用公认有效的方法获得合理科学的数据。而低聚果糖、低聚半乳糖、菊粉的科学试验数据在各类非消化性低聚糖中一直占绝对优势,人体或动物试验数据也远远多于其他非消化性低聚糖。也只有三种非消化性食用低聚糖完全满足益生元上述标准,才可作为益生元类物质,即低聚果糖、低聚半乳糖和菊粉。康宝莱的一款芦荟产品中就含有益生元(低聚半乳糖、菊苣粉)。
      益生元的生理功能,主要是通过促进人体肠内有益细菌繁殖,优化菌群平衡来实现的。作为益生元的低聚糖,还具有膳食纤维的功能,可易于大便排出,有效降低血脂,还可同病原菌细胞结合,从而抑制其在肠壁上定植与生长,起到预防感染的作用。
      调整肠道菌群平衡  进入大肠的碳水化合物,是经上消化道吸收后的残留碳水化合物,每天约只有10~60克,其中大多数是抗性淀粉、非淀粉多糖及非吸收性糖类和膳食蛋白等,由食物摄入非消化性的低聚糖只有数克。大肠菌群利用低聚糖的能力是不同的,体外试验结果表明,双歧杆菌对各种低聚糖几乎都可以利用,而一些有害细菌对大多数益生元几乎都不能利用或很难利用。
      抑制病原菌 病原性微生物侵入机体后与消化道肠黏膜表面结合。由于病原菌在肠道内大量繁殖后直接作用或产生毒素而致病。试验表明,双歧杆菌产生的半乳糖苷酶可降解黏膜上皮细胞中的复杂多糖,使肠道内pH值降低,使有害菌不能在肠腔内定植而产生抑菌作用。@@@
      产生有机酸  低聚果糖、低聚半乳糖等,食后直达大肠,在结肠中被大肠菌群发酵作为能源而利用,双歧杆菌、乳酸菌等有益菌发酵这类碳水化合物,可产生有机酸,其中 95%可被人体吸收而利用。
      有机酸可降低肠道 pH值,有效抑制肠道腐败产物的生成,并促进肠道蠕动而促进排便。
      改善脂质代谢  功能性低聚糖影响脂质代谢的研究还限于低聚果糖和菊粉。动物和人体实验表明,服用低聚果糖对调节血糖、血压,降低血清胆固醇,提高高密度脂蛋白与低密度脂蛋白( HDL/LDL )比例有一定效果。双歧杆菌可产生胆酸水解酶,将结合胆酸游离,而游离的胆酸可抑制病原菌的生长。在 pH=6.0 时,胆汁酸可同胆固醇结合而生成沉淀,随大便排出体外。双歧杆菌和低聚果糖本身也具有一定的吸附胆固醇的能力,使之随大便排出,从而有利于调节血脂。
      促进矿物质吸收  功能性低聚糖可促进钙、镁、锌、铁等矿物质的吸收。已有不少研究证实其对促进儿童生长和预防老年骨质疏松症有益。有人用同位素标记的钙和镁,研究了低聚果糖、低聚半乳糖、棉籽糖、异麦芽糖等对钙吸收的影响。结果表明,低聚果糖可显著促进钙、镁的吸收和骨化作用,低聚半乳糖次之,而异麦芽糖则没有这种功效。用含 10% 低聚果糖的饲料喂养小鼠试验表明,低聚果糖可促进钙、镁、锌、锌的吸收,并可阻止因缺乏雌激素而引起的钙质流失。美国临床营养月刊(Am J Clin Nutr,1999,69:544)报道,对 12 名健康男子进行试验,日食低聚果糖 15克,9 天后用同位素测定,其中 9 人的钙吸收比蔗糖对照组高 10.8 %。Niness(1999)报道,少年日食低聚果糖 15g,钙吸收增加 26 %;青年日食菊粉 4O克,钙吸收增加 58%。@@@
      提高免疫力,预防肿瘤  肠道菌群与癌症有密切复杂的关系,影响肠道菌群平衡的因素有饮食结构、生活习惯、免疫力、病原菌感染、精神压力等,其中与饮食结构的关系最为密切。美国每年有 30 万人死于饮食不当,50 万人死于吸烟。1982 年,美国科学院对癌症起因的调查表明,日常饮食不当所引起占 35%,吸烟占 30%,病毒感染(肝炎)占 10%。饮食不当包括食物结构不合理(如膳食纤维素摄入不足,高脂肪,高蛋白质),多食加有色素、防腐剂等有害添加剂及油炸、烧烤等食物。研究表明,在结肠中癌的发生率要高于小肠约 100 倍,可能是同结肠中存在大量可产生致癌物质的细菌有关。日本研究发现与吃清淡的日式膳食的人相比,吃高脂肪、高蛋白质的欧美式膳食的人肠道中腐败细菌较多,而双歧杆菌的量较少,因而患便秘与结肠癌、乳腺癌者较多。便秘可加重菌群失调,增加肠内毒素生成而引发各种疾病,加速衰老,增加患结肠癌的风险。日本人大多长寿,女性平均寿命 87.6 岁,百岁老人超过 23000 人,这与他们的营养饮食有很大关系。
      临床研究发现结肠癌患者肠道中双歧杆菌数量较少,双歧杆菌量少可能同发生癌症有 关,在缺乏双歧杆菌时肠道中分泌型 IgA* 水平明显低下。食用双歧杆菌或益生元能使分泌型 IgA 水平得到恢复,而对预防结肠癌有一定作用。
      益生元具有多种生理功能,其生理功能主要是通过促进人体肠内有益细菌繁殖,优化菌群平衡来实现的。鉴于益生菌易被胃酸和胆汁杀死,如非加特殊处理,很难活着到达大肠而发挥作用,而益生元可调节肠道菌群平衡,起到益生菌相同的作用,从应用效果上考虑,益生元似乎比益生菌更有实际意义。
      目前市场上的益生元产品已经逐步往多多元化发展,就产品本身而言,除了含益生元之外,更添加了其它促进胃肠道健康的成分,比如库拉索芦荟凝胶等。康宝莱芦荟营养粉中就添加了益生元(低聚半乳糖、菊苣粉),结合了益生元和芦荟促进肠道健康的双重作用。此外, 8月12日在康宝莱中国的力邀下,赵教授参加了康宝莱中国在青岛举办的“康博士”讲座,和广大顾客就这一课题做了进一步的探讨。
      *IgA为免疫球蛋白的缩写,是一种分泌型抗体。
       

      本文仅代表专家观点

       
      食补防酷暑 清凉从口入——五大食品助您战高温
      路易吉 •  格拉顿博士
      康宝莱医学事务与教育部副总裁
       
       
       
      炎炎夏日来临,高温、骄阳拉响健康警报。从皮肤到脾胃,酷暑带给我们的麻烦层出不穷。紫外线晒伤我们的皮肤,夏季滋生的细菌侵扰肠胃,当然,高温也让许多人精神萎靡,甚至中暑虚脱。为了躲避阳光,人们涌向沙滩,山林以及各种室内设施等。但是同时,我们也不能忽略饮食习惯上的调整。下面就让专家告诉您如何通过食补“吃出清凉,吃出健康”。
       
      水果、蔬菜定律:
       
              随着气温的升高,我们的汗液排放也会随之加快。随着水分以及钠、钾、镁等矿物质的流失,我们会变得无精打采,疲惫不堪。“摄入适合的流质以及大量新鲜水果和蔬菜可以帮助您战胜高温,”康宝莱医学与教育部副总裁,美国营养师协会专家路易吉· 格拉顿(Luigi Gratton) 说到,“这些食物不仅可以补充因排汗而失去的水分和矿物质,它们所富含的抗氧化剂还能有效阻止阳光对人体带来的损害”。
       
      因此,天气炎热时,我们应该摄入更多的流质以及新鲜水果和蔬菜等。那么究竟哪些瓜果蔬菜才是最能避暑降温的健康法宝呢?
       @@@
      五大避暑法宝
       
      当高温来袭之际,路易吉· 格拉顿博士推荐了以下五种食物,让您吃出清凉:
       
      哈蜜瓜:没有什么能比瓜类更能代表夏季的了。它们都含有丰富的钾,但哈蜜瓜的钾含量是西瓜的三倍!哈蜜瓜瓜瓤的橙黄色源于胡萝卜素,这是一种强大的抗氧化剂,可以帮助您抵抗烈日危害。
       
      浆果类:是不是在太阳底下待得太久了?甘甜可口的浆果类水果富含与阿司匹林成分相近的物质,可起到消炎作用,能有效减轻日灼带来的伤害。此外,它们还是抗氧化剂维生素C的主要来源。葡萄、香蕉、番茄、柑橘等都是常见的浆果种类,适合在夏季食用。
       
      菠菜:多叶的菠菜富含水分和大量镁。 菠菜的绿色来自于叶黄素,一种能保护皮肤和眼睛免受烈日危害的抗氧化剂。
       
      红辣椒:那么热的天还吃辛辣的食物?一点都没错。富含维生素C的辣椒可以有效促进汗液的排放,起到降温的作用。 如果您对红辣椒并不感冒,那么其它的辛辣食物如大蒜和生姜也会起到类似的作用。
       @@@
      运动型饮料:一般的饮用水可以有效补充水分,但如果您在湿热环境下进行运动,那么运动型饮料也许是一种更好的选择。它们能帮助您补充有价值的矿物质,并增进人体会液体的吸收。此外,其淡甜的口感也会让您有多喝一些的冲动。
       
      以上介绍的五种蔬果都是日常生活中常见并且便宜的食品。通过摄入他们的营养元素,我们可以用食补这种最天然健康的方式抵御酷暑。只要生活中多用点心,您的健康就多几分。
       
      骨骼健康,全身健康

      人全身有206根骨头、230处关节,季节更替、温差及湿度变化容易引发关节炎,需要对骨骼健康倍加关注。

      骨骼看起来如此坚固,以致人们很难相信如此坚硬的器官也会和其他器官一样进行新陈代谢。在人的一生里,骨骼在需要的地方生长成形,在无需的地反方被去除,如成长、受伤及其他因素引起。

      直到30多岁,骨骼仍然处于生长阶段,在那时骨骼组成的拉锯战也开始了。当骨骼建立增强时,钙——这一储存于骨骼中的首要矿物质会从血液中输送到新骨骼。摄入充足钙便是这个骨骼生长阶段的关键之一。维生素D可帮助人体吸收钙,同样也对保证健康骨骼有重要作用。

      随着年龄增长,.身体、饮食及生活方式的变化会影响骨骼健康,造成骨骼成长定型与疏松的不平衡。钙、维生素D、不活动、抽烟、年龄增长带来的荷尔蒙变化,这些都会影响骨骼中矿物质的密度。

      关节同样也会被年龄影响。在骨骼末尾处平滑覆盖的软骨会变薄,而软骨可以为关节和四肢运动制造自然缓冲。维骨素,一种可以帮助软骨“缓冲”、由人体合成的天然成分,同样也会随年龄增长而减少。

      @@@

      “保护骨骼健康对各年龄层的人都很重要,”康宝莱医学事务小组副总裁路易吉•格拉顿博士提出,但他补充说,“适量的钙和维生素D一生都很重要,许多成年人没有摄入足够的此类营养,从而无法达到所需标准。”

      保持骨骼和关节移动自如:

      确保每天摄入适量钙和维生素D,日常事务是这两个营养素的重要来源。

      如果你无法从食物中摄取足够钙和维生素D,你就需要补充保健品。确定所食用的保健品同时包含两种营养素以优化钙质吸收。

      经常运动,包括那些在骨骼和关节上放上一定重物的项目。负重活动,比如散步或慢跑,都能增进骨骼强壮。

      保持肌肉强壮同样有益,因为它们可以帮助吸收一些我们置于关节上的压力。举重可以塑造健壮肌肉和强健骨骼。

      重量过度会给关节施加额外压力,因此,如果你过重的话,减重可以增益关节健康。

       
      盛夏养生说芦荟

      赵华
      北京工商大学化学与环境工程学院副教授
      国家轻工业芦荟制品质量监

       

       

       

       

      踏入炎炎盛夏,高温天气易让人浑身疲乏,食欲不振,抵抗力下降,也让各类炎症、肠胃疾病、流感乘虚而入。夏季养生保健大有学问,今天就来介绍一种用途多多的植物——芦荟。如果您对芦荟的认识还停留在观赏植物,那么就让我们从一个全新角度认识一下它吧。

      人类认识和使用芦荟已有3000多年的历史,我国宋朝的《开宝本草》也记载了芦荟“主治热风、烦闷、胸隔间热气,有明目、镇心之功,治小儿痫积、惊风,疗五毒,杀三虫,治痔病、疮瘘,解巴豆毒。” 1996年联合国粮农组织比较全球植物水果所含的营养价值和有效成分,芦荟名列第一,被喻为21世纪人类最佳保健食品之一。

      芦荟有300多种,最常见的就是库拉索芦荟,又称美国芦荟。它叶片较大,肉厚汁浓。其次就是木立芦荟,也称为日本芦荟,在日本、福建都有种植。另外的两种常见芦荟是中华芦荟和开普芦荟,主要用来观赏。

      芦荟的成分高达200种之多,主要含有多糖、蒽醌类化合物、有机酸、蛋白质、氨基酸、多肽、多种微量元素等。我们都知道,糖类是有机体里面非常重要的一种物质,芦荟中的糖类物质包括单糖和多糖。多糖是芦荟中主要的糖类化合物,并且也是芦荟中主要的生理活性物质,主要存在于芦荟凝胶的粘液部分,通常也被称为粘多糖。研究证实,芦荟多糖能调节细胞生长,提高人体的免疫能力。可帮助减少胃溃疡的发生,促进细胞修复,助益胃肠健康。

      @@@

      到了夏天,人们往往会觉得食欲不振,或者只吃蔬菜水果或者喝太多冰镇饮料。这样不仅容易引发胃炎及溃疡性疾病,而且还会导致人体抵抗力的整体下降,出现腹部不适、恶心、反酸、腹泻、便秘等症状。严重的还导致失眠、焦虑、健忘、神经过敏、头痛等功能性症状。如果出现这些情况,一定要注意改正自己的饮食习惯,同时也可以食用芦荟产品来改善胃肠。在国外,芦荟已逐渐形成一种健康新风尚。比如,全美最佳医生获得者、加州大学人类营养研究中心主任大卫•赫伯博士表示,芦荟产品可以帮助美容、排毒、杀菌。

      芦荟的有效成分

      芦荟中的主要有效成分是芦荟多糖。研究显示,芦荟多糖可以增强免疫能力,促进细胞生长,还发挥着一个“乐队指挥”的作用,使体内氨基酸和其它活性物质协同起来,产生1+1>2的效果。

      蒽醌类化合物是芦荟中的另一活性成分,大多具有杀菌、抑菌、消炎、解毒和促进伤口愈合等作用,还能构促进肠胃的蠕动。研究表明,芦荟所含的蒽醌类化合物可以屏蔽紫外线。其中芦荟素与芦荟胶还能防止色素沉着、使皮肤白晰和补充肌肤流失的水分。因此,如果能多吃芦荟就可更好地完成美白消斑和水润的夏日必修课。

      芦荟的药理作用

      增强噬菌、解毒及清洁功能

      芦荟的一个重要作用便是显著的“噬菌”作用。对于机体来说,人体在代谢中产生大量垃圾,被细菌感染并死掉的细胞是有害的,这些死亡的细胞和其内的毒素就要通过噬菌作用清除出体内。机体的免疫系统通过“噬菌”作用将体内的细菌、感染物和细胞死亡后的残骸清除出去。因此增强噬菌作用就是增强了体内解毒和清洁功能。据报道,芦荟对于一百多种慢性病都有治疗作用。

      @@@

      免疫刺激剂

      这也是芦荟对人体的基础作用。人体在受到伤害和得病的时候身体抵抗力会下降,而芦荟含有植物凝集素,有助于抗感染和淋巴细胞生长,增加淋巴细胞功能,提高人体抵抗疾病的能力。此外,芦荟叶片凝胶中所含的多聚糖、芦荟曼兰(aloemannan)、芦荟克丁(alocutin)和芦荟咪嗪(alomiein)等,都具有提高细胞免疫的功能。因此芦荟在治疗一些由免疫力下降引起的疾病时具有显著疗效。

      抗菌

      芦荟的抗细菌作用源于芦荟苷的细胞毒素功能,这种具有相对进攻性的生化性质,使得芦荟可以直接杀死细菌。并且研究表明,芦荟水溶液对多种皮肤真菌如白色念珠菌等有不同程度的抑制作用。

      抗病毒

      目前还不知道芦荟是否对病毒有直接的杀伤力,但文献中显示芦荟可促进被病毒感染的动物和人的康复。并且芦荟中碳水化合物的类似物可以刺激细胞产生抗病毒物-干扰素。

      消炎

      消炎是芦荟凝胶的一个重要作用,无论是烧伤、物理性伤害、腐蚀性化学物质伤害还是紫外线、热辐射引起的发炎,芦荟凝胶都具有镇痛、消炎作用

      促进伤口愈合

      芦荟在促进伤口和溃疡的愈合方面具有显著的功效,并且不留疤痕。值得一提的是,芦荟在去痘方面也有促进作用,所以在去痘化妆品中也都加有芦荟凝胶。

      芦荟拥有众多的效用成分,通过多年的研究,它的功效正逐渐得到了广泛的临床应用,例如:调节胃酸的分泌,保护胃粘膜,治疗消化系统疾病;增强肠蠕动,有促进畅便功能;提高人体免疫力,抑制肿瘤的作用;缓解牙龈发炎、肿痛;消炎止痛、促进伤口愈合;外部烧伤、烫伤烧伤及皮肤病的治疗等。

      @@@

      选择安全的芦荟产品

      芦荟有很好的效果,但选择安全的产品却是关键。目前市面上大部分芦荟一般只是观赏性植物,而只有库拉索芦荟凝胶被批准为新资源食品原料,安全性和有效性都达到了国家标准。而即便是库拉索芦荟凝胶,由于含有芦荟苷,如果加工不当的话也容易引起腹泻或是失去活性成分,因此选择芦荟产品时需仔细查看标签,认准有保证的品牌。

      本文仅代表专家观点

       
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