One of the newer diet-lingo trends is the term ’oxidizer’. Jillian Michaels – trainer from the Biggest Loser in her book ‘Winning by Losing’ is a big proponent of this method. When I heard about it I was not sure what I thought, and definitely wanted to know her sources – which I am yet to find.
The claim is that people fall into one of three categories: fast-oxidizer, slow-oxidizer or balanced-oxidizer. The theory is that certain foods are better than others depending on which type of oxidizer you are in helping you lose weight. Based on that information, and, addition to determining a calorie range appropriate for weight-loss, meal plans are based around your speed of oxidation.
Here is the rationale she provides: Quote from Jillian Michaels book ‘Winning by Losing’):
Fast-oxidizers should plan their meals: 20% carbohydrates, 50% protein and 30% fat.
- Fast oxidizers should eat foods with more proteins and fats in order to slow down their rate of oxidation and insulin release, and to better promote stable blood sugar and sustained energy levels.
Slow- oxidizers should plan their meals: 60% carbohydrates, 25% protein and 15% fat.
- Slow oxidizers burn through the nutrients in their food slowly and do not release the glucose from carbohydrates into the blood quickly enough, which means that they do not get converted into glucose, and energy production and availability are delayed.
- A slow oxidizer should eat foods with higher ratios of carbs, since protein and fat slow the rate of oxidation and energy production even further.
Balanced – oxidizers should plan their meals: 40% carbohydrates, 30% protein and 30% fat.
- Balanced oxidizers fall right in between the two. They require foods that have equal quantities of protein, fat, and carbs in order to optimally process, produce, and use the energy from their food.
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The above claims do not seem to be highly research-based. I looked for research to support the above ratios to no avail. Having too few carbohydrates in your diet can be detrimental to your health, forcing your body to breakdown fat and protein for energy which can lead to harmful metabolites in your blood. Therefore I am not comfortable recommending the fast-oxidizer ratio to pretty much anyone.
As you may have realized, oxidizing is another word for metabolism. And, it is true, there are different metabolic rates (basal metabolic rate – BMR). There are many ways to assess a persons BMR and often a ‘guestimate’ is sufficient.
Here is how it works. If a person has a BMR of approximately 1500, that means that without doing anything that persons body will burn through 1500 calories in a day. To lose weight that person can exercise to burn more calories or eat less than 1500 calories OR you can do both exercise and eat less. Sounding familiar yet?
Most diet plans generally recommend a caloric range of approx 1200-1400 calories for weight-loss per day for average sized woman and some men including; Weight Watchers and, consequently, Jillian. Regardless of what type of oxidizer you are, if you eat less than you burn you will lose weight.
Do I think the whole idea is bunk? No? I think a balanced diet is very appropriate. I think that too many carbs can cause fatigue resulting from sugar fluctuations, and too few carbs can be unhealthy and potentially detrimental to your body. The balanced-oxidizer ratio seems healthy – is also the same recommendation as the Zone Diet.
It may be that if you have a fast metabolism certain foods make you feel hungry too soon, or tiered and the same for slow-oxidizers. So their may be some merit in certain foods having different reactions in bodies with different metabolisms, but the effect on weight, my guess is indirect at best.
In a Nutshell the term ‘oxidizer’ seems to be a fad-term to make you think there is more to weight-loss than there is. Regardless of what kind of ‘oxidizer’ you are (i.e. how fast your metabolism is) to lose weight you need to eat less than you burn and have enough energy to feel good throughout the day to function and exercise.
In order to accomplish this finding out your BMR is helpful to tell you what your body burns at baseline. If you can’t do that, figure on average 1500 calories or even less may be required for weight-loss per day. Identify foods that make you tiered (may be foods with simple sugars – eat high fiber foods) or feel too full (high-fat foods – stick to grilled, broiled steamed lean meats and fish…eat plenty of vegetables). If this is all sounding familiar…it should!












