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    Dr. Oz Sparks Debate About Raspberry Ketone Supplements

    Dr. Oz says it takes 90 pounds of fresh raspberries to match a single dose of raspberry ketones.
    By Margaret Badore for DietsInReview.com

    Last week Dr. Oz sparked a major debate by endorsing raspberry ketone as a "miracle fat burner" to aid with weight loss. Weight loss expert Lisa Lynn appeared as a guest to discuss how raspberry ketones had helped her clients lose weight. Dr. Oz further illustrated how the diet supplement worked by placing air balloons meant to represent fat cells in liquid nitrogen causing the balloons to shrivel up.

    As the name suggests, raspberry ketone is a compound present in red raspberries and is on the USDA's list of ingredients that are generally recognized as safe. It gives the berries their aroma, but is naturally present in very low levels. As stated on the Dr. Oz Show, it would take 90 pounds of fresh berries to get the equivalent amount of ketone that's found in the supplement form. What the show didn't mention is that due to this natural scarcity, the raspberry ketone found in supplements is usually synthesized industrially.

    However, the research behind the claims that raspberry ketones help with weight loss is scant. There have been two small studies showing laboratory mice are less likely to gain weight when adding raspberry ketones to their diet. However, there have been no placebo-controlled studies of humans.

    Raspberry ketones affect the metabolism through two mechanisms by increasing the levels of two hormones, norepinerphrine and adiponectin. Increasing the norepinephrine causes the body's temperature to rise, causing the body to burn more fat. "Raspberry ketones also increase levels of adiponectin, which is a hormone that helps with lowering glucose levels," explains Dr. Sarah G. Khan, DietsInReview.com's resident pharmacist. "The less circulating glucose, the less likely it will be converted into a stored energy source like glycogen. Adiponectin is found least frequently in obese people and may have a possible role to play in insulin resistance and diabetes."

    In other words, raspberry ketone is a stimulant, like so many other weight loss supplements. Although Dr. Oz's guest described raspberry ketone has having "no side effects," it may increase heart rate and affect blood pressure. As well, Dr. Khan cautions of the raspberry ketone side effects that could impact the thyroid. Other common side effects of stimulants include difficulty sleeping and agitation. Additionally, Dr. Khan says that the supplement may interact with a number of different medications, and would not recommend the supplement to anyone with diabetes, high blood pressure, asthma or who is taking antidepressants. She suggests that anyone with a serious medical condition consult with a doctor before taking raspberry ketones.

    At then end of the segment, Dr. Oz does add the caveat that the supplement should be combined with a sensible diet and regular exercise, which in many ways sounds like a far cry from the "miracle" introduced. There's also no mention of how long it's safe to continue taking this supplement. "I would think that these products would only be effective for a short period of time and would eventually have to be discontinued," says Dr. Khan. "If weight loss is achieved weight maintenance would required a healthy diet and exercise."

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    40 comments

    • Lou  •  11 days ago
      Dr. Oz has become a supplement pushing machine! I no longer watch his show. he is after the almighty ratings game and the big buck!
    • Veronica  •  Concord, New Hampshire  •  10 days ago
      I sent for Pure Raspberry Ketone 250mg-240 caps from Nutra-bio online last nite. I am going to try them and see if they work for me, I am not on any meds. I do exercise, and eat sensibly most of the time!
    • A Yahoo! User  •  Spokane, Washington  •  10 days ago
      raspberry keytones do nothing,at all.i have been takeing them for weeks now,go to the gym 4-5 days a week,and not 1 pound lost.it is a scam
    • Boo-boo  •  1 month 19 days ago
      I consider this irresponsible of Dr. Oz. There is NO food or OTC medication that will take pounds off. (There IS a very dangerous chemical that will, but people took more than was safe, so it was pulled years ago . . . it uncoupled oxidative phosphorylation so energy released was not "captured" in the production of ATP, rather it was released as heat. As others have said: less food, quality nutrition, exercise (weights and cardio) AS A LIFE STYLE, rather than a temporary restrictive diet.
    • Jennifer  •  Tyler, Texas  •  2 months ago
      if you want to lose weight, this pill alone is not gonna do it.. you have do your part by eating better and exercise.. sitting in front of the tv and eating bad carbs is not helping you one bit.. even walking 30mins aday is better than nothing..
    • alonda H  •  Kalamazoo, Michigan  •  2 months ago
      Change eating habits get 8 hr of sleep and 30 min of some kind of exercise a day. If you want new and better you have to be willing to get it. A fast fix did not put the pound on us ,we did so it would make since that a fast fix cant fix it.We have to be willing to take one day at a time and know that you are worth it only you can get your sexy back.....
      • reader 2 months ago
        def , eat right ,exercise, read, sleep.....have fun, be happy
      • ME 12 days ago
        Until the age of 40 I was 115 NOW I am 145 your body hormones change and YOUR weight change. If a pill will save my life or help me achieve a goal why wouldnt I use it??
    • deborah z  •  Eugene, Oregon  •  1 month 26 days ago
      WE SELL RASPBERRY KETONES 500MG AND IF YOU ARE ADDING THEM TO YOUR HEALTHY LIFESTYLE THEY DO HELP MIXED WITH CLA THE KEYTONES ARE GREAT FOR TONING. CALL COMPLETE NUTRITION 541 973 2118 WE SHIP FREE EVERYWHERE
      • Lou 11 days ago
        YOU ARE AS BAD AS DR. OZ!
    • Jennifer  •  2 months ago
      I imagine it definitely could affect a person's panic attacks. Since it works as a stimulant, and therefore increases blood pressure and heart rate, probably wouldn't be a comfortable experience. These ladies are right. There's no quick fix. The only thing that's ever worked for me is eating less and moving more. Takes a little time, and patience. It's sad, but I'd say since Dr. Oz is endorsing this kind of thing, he's sold out. Maybe I'm wrong, but He knows eating right and exercising is the best way to go. And hello! 90 pounds of fresh berries to produce a few pills? Doesn't seem so necessary to the healthy diet to produce that much waste. Does it?
      • reader 2 months ago
        i agree...i was revved up when i took one , but even a small amount of sudafed can do that to me.
    • Brian Wahrenberger  •  Daytona Beach, Florida  •  2 months ago
      I work in a health food store and we sell vitamins to and raseberry ketones.People make me mad when they buy this and say so this the mircle supplement .They forget you have to work out and eat good.They want to be lazy and sit on there butts all day. Talk to your doctor and stop listening to Dr.Oz. .
      • Boo-boo 1 month 19 days ago
        People gave this "thumbs down". Really?!! Guess they were just hoping a "quick fix" was possible.
    • reader  •  2 months ago
      i only took one pill and a smidge of some from the capsule....conincedentally my t4 is now high, but they fogot the tsh...i'll have it all chked again in a few months...i'm nt taking anything and am having energy- i hope the t4 goes to normal again and i still have this energy.

      before, my tsh was high and i was tired all the time....i've been tested for disease etc for many years now...t4,t3 and tsh tests are a must when supplementing for thyroid.imo
      • Pupstermum 2 months ago
        I have no idea what you just said.
      • sheree b 2 months ago
        whats t4
      • reader 2 months ago
        when your doctor checks for thyroid deficiency it's important to have these tests

        tsh ,t4 and t3 , they will know what this is and it is basically a thyroid panel to chk the ability of the thyroid to function. it should be taken every 6 months or so to check the changes, as it takes awhile for thyroid hormone levels to change.

        any of these functions can change due to thyroid problems or even an illness. i will test again in a few months, i'm hoping the high t4 was due to illness that has passed. i went from hypo to hyper in 6 months with no treatment except taking the rasp-ketone, so naturally i suspected the supplement as being the precurser to this ....only time will tell . i'm just saying the doctor should be involved when supplementing.
    • Candi  •  2 months ago
      i get energized from eating a bowl of mixed berries and we all know that is safe and won't interact with anything
    • Haley  •  Fayetteville, North Carolina  •  3 months ago
      Hi everyone.. I got some raspberry keytones after my mom saw this show and told me about it. HOWEVER I DID call my doctor first because I have hypothyroidism and on medication for that which we had been having trouble getting a dose that would put my thyroid levels in the normal range. I told her about the show and that I was interested in this, even if it didn't help me lose weight I have 3 kids, husband in the military, and go to college I could use an energy boost, and wanted a natural one. I work out daily, (use to be a marine as well) and with the thyroid I could not lose weight after having my son which is how I found out about my thyroid. My doctor told me to look for ones that were just the raspberry cerotine with out all the added crap in it. So I did a lot of research and found some that are nothing but the raspberry, basically just taking the raspberry skin and natural sugars out of the mix. I take 2 in the morning and 2 in the afternoon (bottle says you can take up to 4 a day), and after 2 weeks the only side effect my doctor and I see is I kind of smell like raspberries for about an hour afterward, and I can taste it.. and unless you don't like the taste of raspberries then thats not a bad thing. I do have high blood pressure that I'm being treated for and I test my BP a few times a day and take a log and my medication for it is once nightly before bed. I have not noticed at all a change in my BP making it higher, it has been well with in a normal range and I have had fewer migraines because of it. I am NOT taking the exact pills that Oz suggested I did my own research on them.. and the way I see it with this other doc mentioned above, all doctors have their own opinions, I have had 2 doctors in the same practice before believe two different things about the same issue. You should always do your own research on things and not just be a robot and do what they say with out finding out the who, what, when , where and why if what your doing or the condition you have, you know your own body better then anyone else. I am going to keep taking my raspberry keytones until I see an affect in my own body that concerns me or my doctor.. but right now I just got a call on Monday that my thyroid levels that were checked the Friday before are FINALLY normal, and I have lost so much since Christmas (I'm not using the pills as a crutch, I am eating differently, and working out daily as well) but since taking the keytones I have been getting much faster results with what I'm doing. Say it's just kicking in, or say it's the keytones I don't care I'm now feeling better, inside and out and they sure are not hurting me.
    • Julie  •  Fresno, California  •  2 months ago
      Has anyone with panic and/or anxiety disorders tried this supplement? I ordered them and they came in the mail today, but I am worried about taking them. I just don't want anything else to trigger my panic/anxiety attacks. I know everyone is affected differently, but I just want advice from someone like me that has tried this. Thanks...
    • jd2009  •  3 months ago
      Dr. Oz is in the business of making people, especially women, think they have multiple illnesses or that they need to start taking random supplements (like this raspberry crap) to either lose weight or maintain a long life. Everytime there is a commercial for his show it's always: Today on Dr. Oz, you'll learn how to beat the 4 top chronic illnesses and beat belly fat once and for all.
      There's no doubt he is a smart doctor but he is turning legit healthcare into a money making scheme.
      Wanna know the secret to living long? Eat healthy, exersice 5x a week, and maintain a positive social network.
    • Ducky  •  Perham, Minnesota  •  2 months ago
      I have been taking 3 pills a day for a week now and haven't notice any change at all....plus been eating right and excersize....I think it was all a joke when it comes to a magic weight loss.
    • lola  •  Dallas, Texas  •  3 months ago
      I don't know what everyone is talking about....it isn't a miracle pill and never once did dr. Oz say that taking this supplement ALONE would make you lose weight. All through the show and all his shows he pushes a healthy diet and exercising. It is simply an aid to help with the process but all the work comes from Us ourselves. America, you're simply just fat. We eat out a lot and we're lazy to cook our own food and workout. I've lost 70lbs listening to dr. Oz in 4 months. I eat a lot.....of food I cook myself. I cut out packaged food like he said....i exercise regularly and take supplements that I find help the process because when I started I didn't take a single supplement. Everyone is different and needs different supplements. stop looking for the easy way out..it is also a mental thing.that's all I gotta say.
    • reader  •  3 months ago
      and also, i agree that one ingredient or medicine will affect each person differently, and the one i bought was rasp.ketones only-not the ketones plus [other ingredients]. i am sensitive to medications and supplements, so this is probably why i am feeling so energized. I haven't taken a decongestant for many years cause of the wired effect. but it would be great if i can adjust my dose of raspK , i exercise and eat well-just have a sluggish thyroid [been tested and all that :) ].....
    • Connie  •  Massillon, Ohio  •  3 months ago
      I see a lot of Dr. Oz bashing. What it comes down to is; do your homework, find out for yourself if any supplement is what you want to put into your body. If anyone took all the supplements he suggests, a person wouldn't have to eat! He does have some good suggestions, but make sure its right for you.
    • Hannah  •  3 months ago
      Eat raspberries. They are good for you. Screw the supplement.
    • Camron  •  Birmingham, Alabama  •  3 months ago
      Its not common sense to know that 99% of the medicine that is out there today will affect everyone differently just because it might not work for you doesnt mean that it wont for somebody else.

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