Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Are you a little low? Failure to match energy intake with requirements is a possible cause of that ‘low blood sugar’ feeling.

15.08.2006
As many as one third of women experience symptoms which they believe are caused by low blood glucose (sugar), according to a recent survey conducted in Nottinghamshire (1).

The symptoms of such low blood glucose (or hypoglycaemia, as it is medically termed), include: irritability; faintness; tremor; hunger and anxiety. However, it is not known whether such women experience true (biochemically defined) hypoglycaemia or whether their symptoms are caused by some other factor. Hypoglycaemia, especially following a meal, is rare in otherwise healthy women.

Reporting in the British Journal of Nutrition (2), scientists from the University of Nottingham conducted a study on 30 healthy, non-obese women (aged 19-49 years) who reported symptoms they thought were due to hypoglycaemia on one or more occasions each week, plus 18 symptom-free controls. The women took finger-prick blood samples and measured their blood glucose three hours after breakfast and lunch and also recorded their diet and physical activity levels for a week. Women who reported experiencing hypoglycaemia also took blood glucose measurements whenever they felt symptoms.

Women who reported symptoms of hypoglycaemia after a meal had significantly lower blood glucose compared to women in the control group (4.7 vs 5.1mmol/L). Furthermore, blood glucose was significantly lower than controls when symptoms were being experienced (4.2 mmol/L). Biochemically, hypoglycaemia is defined by a blood glucose of 3.0mmol/L. or less; only seven out of 30 women reporting symptoms of hypoglycaemia actually had a blood glucose indicative of hypoglycaemia, suggesting that other factors may be causing symptoms. However, the observation that glucose values were significantly lower on occasions when symptoms were noted suggests some alteration in glucose balance in these women.

Sugar has been anecdotally cited as a cause of ‘reactive hypoglycaemia’ (blood glucose levels falling a few hours after a meal). In this study, there was no difference in sugar intake between the two groups. Fat and protein intakes were lower on days when women experienced symptoms of hypoglycaemia. Some common starchy foods, such as wholemeal bread or potatoes, raise blood glucose to a similar or greater extent to table sugar (sucrose).

Researchers, Ian Macdonald and Elizabeth Simpson from the University of Nottingham, point out that symptoms associated with hypoglycaemia after eating, such as tremor, anxiety, irritability and feeling faint are also seen in women with other conditions.

Exploring reasons for the symptoms of reactive hypoglycaemia; researchers suggest that energy imbalance may play a role in the aetiology.

On days when women experienced symptoms of hypoglycaemia they tended to be more physically active, when compared with the control group, and their reported energy intake did not meet predicted energy requirements. As exercise increases insulin sensitivity, the combination of increased physical activity and a mismatch of energy intake with needs, leads to a lower blood glucose and may be a contributing factor to hypoglycaemia.

Therefore, if you experience symptoms of reactive hypoglycaemia it appears important to match energy intake with requirements on a daily basis, especially if you are physically active.

Hannah Theobald | alfa
Further information:
http://lysander.ingentaconnect.com/vl=13740670/cl=11/nw=1/rpsv/cgi-bin/linker?ini=cabi&reqidx=/ij/cabi/00071145/v95n6/s14/p1127

More articles from Health and Medicine:

nachricht Foods of the future
15.08.2018 | Georg-August-Universität Göttingen

nachricht New antibody analysis accelerates rational vaccine design
09.08.2018 | Scripps Research Institute

All articles from Health and Medicine >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Unraveling the nature of 'whistlers' from space in the lab

A new study sheds light on how ultralow frequency radio waves and plasmas interact

Scientists at the University of California, Los Angeles present new research on a curious cosmic phenomenon known as "whistlers" -- very low frequency packets...

Im Focus: New interactive machine learning tool makes car designs more aerodynamic

Scientists develop first tool to use machine learning methods to compute flow around interactively designable 3D objects. Tool will be presented at this year’s prestigious SIGGRAPH conference.

When engineers or designers want to test the aerodynamic properties of the newly designed shape of a car, airplane, or other object, they would normally model...

Im Focus: Robots as 'pump attendants': TU Graz develops robot-controlled rapid charging system for e-vehicles

Researchers from TU Graz and their industry partners have unveiled a world first: the prototype of a robot-controlled, high-speed combined charging system (CCS) for electric vehicles that enables series charging of cars in various parking positions.

Global demand for electric vehicles is forecast to rise sharply: by 2025, the number of new vehicle registrations is expected to reach 25 million per year....

Im Focus: The “TRiC” to folding actin

Proteins must be folded correctly to fulfill their molecular functions in cells. Molecular assistants called chaperones help proteins exploit their inbuilt folding potential and reach the correct three-dimensional structure. Researchers at the Max Planck Institute of Biochemistry (MPIB) have demonstrated that actin, the most abundant protein in higher developed cells, does not have the inbuilt potential to fold and instead requires special assistance to fold into its active state. The chaperone TRiC uses a previously undescribed mechanism to perform actin folding. The study was recently published in the journal Cell.

Actin is the most abundant protein in highly developed cells and has diverse functions in processes like cell stabilization, cell division and muscle...

Im Focus: Lining up surprising behaviors of superconductor with one of the world's strongest magnets

Scientists have discovered that the electrical resistance of a copper-oxide compound depends on the magnetic field in a very unusual way -- a finding that could help direct the search for materials that can perfectly conduct electricity at room temperatur

What happens when really powerful magnets--capable of producing magnetic fields nearly two million times stronger than Earth's--are applied to materials that...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Within reach of the Universe

08.08.2018 | Event News

A journey through the history of microscopy – new exhibition opens at the MDC

27.07.2018 | Event News

2018 Work Research Conference

25.07.2018 | Event News

 
Latest News

Unraveling the nature of 'whistlers' from space in the lab

15.08.2018 | Physics and Astronomy

Diving robots find Antarctic winter seas exhale surprising amounts of carbon dioxide

15.08.2018 | Earth Sciences

Early opaque universe linked to galaxy scarcity

15.08.2018 | Physics and Astronomy

VideoLinks
Science & Research
Overview of more VideoLinks >>>