Fat Burn
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- Obesity
Adipose tissue
suppressed. Brown type tissue is notable for its ability to dissipate energy via a process of
suppressed. Brown type tissue is notable for its ability to dissipate energy via a process of
uncoupled mitochondrial respiration.
uncoupled mitochondrial respiration.
body weight which is fat increases to about 25%, the proportion of fat then gradually diminishes
body weight which is fat increases to about 25%, the proportion of fat then gradually diminishes
to normal levels in non-obese individuals. During the first 2 years of life, increase in adipose cell
size account for most of the growth in the adipose mass, although some new cell formation
(increase in cell number) also occurs after age 6 to 12 months. Cell number remains relatively
constant or rise very slowly from 2 years of age until close to the onset of puberty, during which
time the adipose tissue expands hypertrophy). During adolescence there is another increase in
hypertrophy). During adolescence there is another increase in cell number, which account for a
second spurt in the growth f adipose tissue mass. Thereafter, the amount of adipose non-obese
adults maintaining constant body weight remains relatively stable, as do adipose cell size and
number.
size and number.
The size of adipose cells within non-obese individuals can vary considerably from fat depot to fat
depot, in a large group of non-obese healthy subjects, cell size in six separate fat depots ranged
from 0.14 to 0.68 Mg of lipid per cell, with a mean size of 0.41 Mg of lipid per cell. The average
total cell number in this non-obese population was 39*109. Modest increase or decrease in fat
cell size occur with modest changes in body weight, but adipose cell number remains constant
through the adult life of non-obese individuals maintaining constant body weight, when
non-obese people lose weight, only the size of the fat cells decreases, adipose cell number
dose not decline even if weight loss is massive.
Studies of obese humans reveal that the excessive expansion of adipose tissue can be
achieved either by an increase in adipose cell size (hypertrophic, normal cellular obesity) or in
both adipose cell number and size (hypercellular, hypertrophic obesity).
The existence of adipose hypercellularity in humans apparently depends on two factors: the age
of onset and the severity of obesity. Hypercellular obesity usually, but not always, has its onset
in early life, usually before the age of 20 years. Obesity of later onset is usually, but not always,
accompanied by adipose cellular enlargement and normal cell number. There appear to be two
periods in early life when hypercellularity is most likely to develop: very early, within the first year
or two, and later, at or around the time of puberty. The studies of obese children cited above
demonstrate, in contrast to the nonobese pattern of adipose tissue growth and cellular
development, marked expansion of the adipose depots throughout childhood, accompanied by
both cellular enlargement and proliferation, beginning especially during the second year of life.
The relationship between hypercellularity and severity of obesity is a direct one: the more sever
the obesity the grater the number of adipose cells. In the study of obese children noted above,
total adipose cell number was markedly increased when body fat constituted greater than 25%
of body weight. Furthermore, when expansion of adipose tissue during adult life is massive,
increase in cell number and hypercellular obesity can occur. Evidence from studies of rodents
also indicates that obesity of adult onset can, under certain circumstances, be accompanied by
marked increases in fat cell number it has also been reported that when adult body weight
exceeds 170% of ideal, a maximum cell size (1 to2 Mg of lipid per cell) is apparently reached,
above which cell number and obesity are highly correlated.
Thus, studies in rodents and in humans suggest that attainment of maximum adipose cell size is
accompanied by the activation of some factor(s) which can stimulate adipose cell proliferation,
whenever a maximum cell size is attained, replication of adipose cells occurs. The nature of this
putative signal is unknown.
suppressed. Brown type tissue is notable for its ability to dissipate energy via a process of
suppressed. Brown type tissue is notable for its ability to dissipate energy via a process of
uncoupled mitochondrial respiration.
uncoupled mitochondrial respiration.
body weight which is fat increases to about 25%, the proportion of fat then gradually diminishes
body weight which is fat increases to about 25%, the proportion of fat then gradually diminishes
to normal levels in non-obese individuals. During the first 2 years of life, increase in adipose cell
size account for most of the growth in the adipose mass, although some new cell formation
(increase in cell number) also occurs after age 6 to 12 months. Cell number remains relatively
constant or rise very slowly from 2 years of age until close to the onset of puberty, during which
time the adipose tissue expands hypertrophy). During adolescence there is another increase in
hypertrophy). During adolescence there is another increase in cell number, which account for a
second spurt in the growth f adipose tissue mass. Thereafter, the amount of adipose non-obese
adults maintaining constant body weight remains relatively stable, as do adipose cell size and
number.
size and number.
The size of adipose cells within non-obese individuals can vary considerably from fat depot to fat
depot, in a large group of non-obese healthy subjects, cell size in six separate fat depots ranged
from 0.14 to 0.68 Mg of lipid per cell, with a mean size of 0.41 Mg of lipid per cell. The average
total cell number in this non-obese population was 39*109. Modest increase or decrease in fat
cell size occur with modest changes in body weight, but adipose cell number remains constant
through the adult life of non-obese individuals maintaining constant body weight, when
non-obese people lose weight, only the size of the fat cells decreases, adipose cell number
dose not decline even if weight loss is massive.
Studies of obese humans reveal that the excessive expansion of adipose tissue can be
achieved either by an increase in adipose cell size (hypertrophic, normal cellular obesity) or in
both adipose cell number and size (hypercellular, hypertrophic obesity).
The existence of adipose hypercellularity in humans apparently depends on two factors: the age
of onset and the severity of obesity. Hypercellular obesity usually, but not always, has its onset
in early life, usually before the age of 20 years. Obesity of later onset is usually, but not always,
accompanied by adipose cellular enlargement and normal cell number. There appear to be two
periods in early life when hypercellularity is most likely to develop: very early, within the first year
or two, and later, at or around the time of puberty. The studies of obese children cited above
demonstrate, in contrast to the nonobese pattern of adipose tissue growth and cellular
development, marked expansion of the adipose depots throughout childhood, accompanied by
both cellular enlargement and proliferation, beginning especially during the second year of life.
The relationship between hypercellularity and severity of obesity is a direct one: the more sever
the obesity the grater the number of adipose cells. In the study of obese children noted above,
total adipose cell number was markedly increased when body fat constituted greater than 25%
of body weight. Furthermore, when expansion of adipose tissue during adult life is massive,
increase in cell number and hypercellular obesity can occur. Evidence from studies of rodents
also indicates that obesity of adult onset can, under certain circumstances, be accompanied by
marked increases in fat cell number it has also been reported that when adult body weight
exceeds 170% of ideal, a maximum cell size (1 to2 Mg of lipid per cell) is apparently reached,
above which cell number and obesity are highly correlated.
Thus, studies in rodents and in humans suggest that attainment of maximum adipose cell size is
accompanied by the activation of some factor(s) which can stimulate adipose cell proliferation,
whenever a maximum cell size is attained, replication of adipose cells occurs. The nature of this
putative signal is unknown.
Read more about obesity
Classification of Obesity
Basic Methods for
Measurement of Obesity
Epidemiology of Obesity
Etiology of Obesity
Behavioral Change
Classification of Obesity
Basic Methods for
Measurement of Obesity
Epidemiology of Obesity
Etiology of Obesity
Behavioral Change
Proactol
Lipocerin
Chitosan
Biosculpt Night
Time Weight
Loss Formula
Conjugated
linoleic acid
(CLA)
Pyruvate
Lipocerin
Chitosan
Biosculpt Night
Time Weight
Loss Formula
Conjugated
linoleic acid
(CLA)
Pyruvate