Re: Low fat is better than high fat to promote weight loss?

[Guest guest]

Date: Fri, 23 May 2003

From: Alan Pater <apater@...> Wrote:

Body weight, total body fat content, and adipose tissue depots were greater

in the high fat fed groups compared to the low fat fed groups.

This makes it sound to me that low fat makes it easier to lose weight and

hence probably restrict calories.

Hi Al and All,

The comment I would add to yours is that these rats were put on a 40% fat

diet, which according to other research I've read, thanks to you, is that at

about 37% fat and higher, for humans, often causes insulin resistance or

less insulin sensitivity. Comparing 40% to 6% fat in rat diets seems doable

in a " remote " lab setting but quite extreme for humans, as we humans aren't

going to eat a 6% or less fat diet for 99.9%+ of the human population. Nor

should we be eating 40% fat in our diets, when this may cause insulin

resistance at 37% fat & higher levels. (Athletes or endurance exercisers

could be likely exceptions.)

I'd suggest eating about 36% fat for one's upper limit to avoid potential

insulin resistance, which can happen more often at 37%+ fat in one's diet.

Looks like the mono-fats win again too. See below.

CRegards, numi

I could not find the not full text available paper in Medline.

Nutrition Research Volume 22, Issue 5 , May 2002, Pages 609-621

Monounsaturated canola oil reduces fat deposition in growing female rats fed

a high or low fat diet

Jill Ellisa, b, Ann Lakea, b and Jane Hoover-Plowa

Abstract

The purpose of this study was to determine whether canola oil

(monounsaturated fatty acids) and corn oil (polyunsaturated fatty acids)

compared to coconut oil (saturated fatty acids) had a differential effect on

adipose tissue deposition in growing female rats fed high (40% kcal) (HF) or

low fat (6% kcal) (LF) diets. Body weight, total body fat content, and

adipose tissue depots were greater in the HF fed groups compared to the LF

fed groups. In the LF fed rats, body weight, body weight gain, and total

body fat were higher in the rats fed corn oil (COR) compared to rats fed

canola oil (CAN) or coconut oil (COC). Fat source affected adipose tissue

fat cell size and number differentially. In the HF groups, fat cell size was

larger for COR fed rats than for CAN or COC fed rats, but fat cell number

was greater for COC fed rats than for corn and CAN fed rats. CAN had a

positive advantage over COR since rats fed the LFCAN had a lower body weight

gain, HFCAN rats maintained a smaller fat cell size than HFCOR and HFCOC fed

rats, and plasma lipids were lower in CAN fed rats than for COR fed rats.

..