Behind the Low-Carb Headlines - Low

Behind the Low-Carb
Dana Carpender
View the complete video at
Low Carb Diet Hurts
Big, Carb-Heavy Breakfast
Aids Weight Loss!
Atkins Diet Increases
All-Causes Mortality!
Deep Breath!
Designed to sell newspapers
and magazines
Never subtle
Subtlety is where the truth lies!
The ________ Media!
Supported by advertising
Food processors
Drug industry
What happened to the Incredible
Edible Egg???
Is Beef still What’s for Dinner???
Consider the Source
What is the publication?
Who is the author?
 Obvious bias?
Read the article
Any new information, or just the
same old canards?
Observational (most are this type)
Correlation is NOT causation!
 Maybe suggestive, never conclusive.
How many subjects?
 Over what period?
 Closely monitored?
 What was the actual diet?
 Multiple variables?
Comparison of Weight-Loss Diets
with Different Compositions of Fat,
Protein and Carbohydrates
“No difference in diets for weight loss”
Clinical study, 811 (645) participants
The diets:
20% fat, 15% protein, 65% carb
 20% fat, 25% protein, 55% carb
 40% fat, 15% protein, 45% carb
 40% fat, 15% protein, 35% carb
Reading more closely…
“Low-Carb” = 35% calories from
carbohydrates, or 137 grams???
Only 40% from fat??? (I shoot for
more like 70-75%.)
Reported intakes did not reach
target levels of macronutrients!
They never actually tested a lowcarbohydrate diet!
10% of participants kept off 10% of
their body weight. Success?
Atkins Diet Increases
All-Cause Mortality!
by Dr. Dean Ornish
Annals of Internal Medicine
“Meat Intake and Mortality: A
Prospective Study of Over Half a
Million People”
(Gosh, we’re awfully impressed, I can tell you!)
Reading more closely…
“Prospective” = “Observational”
“Meat intake was estimated from a
food frequency questionnaire…”
Big assumptions:
Accurate memory of what you ate
 Food intake remains the same for
a decade
So, how did this one work?
“High animal protein” and “high
vegetable protein” groups
 Broke into deciles by carb intake
 Men vs Women
 “Lowest carb” group still 37%, or
168 grams carb
 “Low-carb”/high-veg group was
even higher over all
 Men ate more carbs than women.
NO GROUP was close to “low-carb”
“High-veg” group actually ate more
animal protein than vegetable!
Lowest 2/3 of “low-animal” group
ate more animal protein than “highanimal” group!
Lowest 2/3 of women’s “low-animal”
group ate more red/processed meat
than “high-animal” groups!
Differences persisted with the men.
Where did the animal group’s carbs
come from? Had to be sugar.
What did this demonstrate?
Except an overwhelming desire of
some people (ahem-Ornish-ahem!)
to “prove” that animal foods are bad
and plant foods are good.
Next: Multiple Variables
The “Big Breakfast” Study
94 obese women with metabolic
Put on either a “low-carb” or a “big
breakfast” diet
“Low-carbers” did a little better in first
four months, then regained
“Big-breakfasters” continued to lose
Reading more closely…
Calories: Low-carbers ,1085; bigbreakfasters, 1240. Huh?
Carbs: LC, 17 g; BB, 97 g.
Fat: LC, 78 g; BB, 22 g.
Protein: LC, 51 g; BB, 93 g. Huh?
Breakfast size: LC, 290 calories,
25% of daily calories; BB, 610
calories, nearly half daily calories.
SIX (count ‘em SIX) Variables!
Caloric intake
Fat intake
Carbohydrate intake
Protein intake
Breakfast size
Weighting of caloric intake toward
beginning/end of day
So, who did what to whom?
And what’s with this?
Bad math!
What low-carb diet restricts you to
1000 calories a day?
What low-carb diet restricts
breakfast size?
Only 51 grams or protein a day?
Straw Man Argument!
Low-Carb Diet & Memory Loss
19 women, aged 22 to 55
9 low-carb, 10 low-calorie
Week 1: low-carbers showed
decreasing memory and slowed
reaction time
Week 2: carbs added back,
cognition skills “returned to normal”
Wait a minute now…
First week was essentially zero-carb.
(Do you remember your first week?)
Just getting to Induction by the end
of the study – and their cognitive
problems vanished!
Even in Week 1, low-carbers still outperformed on “attention vigilance
Once again, someone is “creating a
reality” they only wish were true.
Low Carb Diet Best for
Lowering Blood Pressure
(Now we’re talking!)
146 obese subjects with comorbidities
(diabetes, elevated cholesterol &
triglycerides, hypertension)
Half put on low-carb, half on low-fat
with orlistat (aka xenical or “Alli”)
Low-carbers were on Atkins induction
– an actual low-carb diet!
So, how did they do?
Low-carb group lost 9.5% of their
body fat; low-fat group lost 8.5%
(even while taking the orlistat)
Both improved cholesterol and trigs
Insulin & glucose markers improved
only in low-carb group
BP improved far more dramatically
in low-carb group
47% of low-carbers discontinued BP
meds vs 21% of low-fat group
In summary, ask yourself…
Do I trust the source?
Is there actual science involved?
Observational or clinical study?
How big? How long? How was it
Was it really low-carbohydrate?
Do the headlines match the actual
Tune in:
Jimmy Moore
Tom Naughton
Dr. Mike Eades
Denise Minger
Obligatory Self-Promotion
Hold The Toast! (blog)
Dana’s Low-Carb for Life (podcast)
My TotalGym Transformation

similar documents