Eieren gezond voor ouderen.*
Uit een onderzoek onder ouderen ( 50-80 jaar) blijkt dat eieren gezond zijn. Het eten van eieren verhoogt duidelijk de bloedwaarden aan luteïne, zeaxanthine en carotenen, enkele belangrijke bioactieve stoffen. De cholesterol in eieren verhoogd bij de meeste (67%) mensen niet de cholesterol waarden in het bloed en bij de mensen (33%) die meer reageren op cholesterol uit voedsel verhogen de cholesterol waarden wel iets doch dit wordt veroorzaakt door minder slechte lipiden.
Plasma
LDL and HDL characteristics and carotenoid content are positively influenced by
egg consumption in an elderly population1
Christine
M Greene, David Waters, Richard M Clark, John H Contoisand Maria Luz Fernandez
Abstract (provisional)
Background
Approximately
1/3 of individuals have a high plasma response to dietary cholesterol (hyper-responders).
Although increases in both LDL and HDL cholesterol have been observed, limited
data exist regarding effects of egg consumption on lipoprotein subclasses and
circulating carotenoids.
Methods
29
postmenopausal women (50-68y) and 13 men (60-80y) were assigned to either 3 eggs
(EGG, 640 mg cholesterol /d) or an equal volume of cholesterol-free egg
substitute (SUB, 0 mg cholesterol/d) for 30d. Following a 3 wk wash out,
subjects crossed over to the alternate diet. Individuals with a response to
dietary cholesterol > 2.2 mg/dL for each additional 100 mg of dietary
cholesterol were classified as hyper-responders while hypo-responders were those
with a response < to 2.2 mg/dL. Nuclear Magnetic Resonance (NMR) spectroscopy
determined LDL and HDL size & particle concentrations. Dietary records were
used to evaluate carotenoid consumption.
Results
Hyper-responders
had higher concentrations of both LDL cholesterol (LDL-C) and HDL cholesterol (HDL-C)
after EGG. In contrast, the concentrations of plasma LDL-C and HDL-C did not
differ between the EGG and SUB for the hypo-responders. After EGG,
hyper-responders had larger (> 21.2 nm) less atherogenic LDL particles (P
< 0.001) and larger HDL particles (> 8.8 nm) (P < 0.01), with no
significant difference in the total number of LDL or HDL particles. Regardless
of response classification, all individuals had an increase in plasma lutein (from
32.4 +/- 15.2 to 46.4 +/- 23.3 ng/L) and zeaxanthin (from 8.8 +/- 4.8 to 10.7
+/- 5.8 ng/L) during EGG, yet hyper-responders displayed higher concentrations
of carotenoids when compared to hypo-responders
Conclusion
These
findings suggest that the increases in LDL-C and HDL-C due to increased egg
consumption in hyper-responders are due to an increase in the less atherogenic
lipoprotein subfractions. Also, increases in plasma carotenoids after EGG may
provide a valuable dietary source for this population.
Nutrition & Metabolism
2006, 3:6 doi:10.1186/1743-7075-3-6
(
Januari 2006)
