Adverse Effects of Islamic Fasting

Contrary to popular Muslim beliefs, Islamic fasting (Sawm) has numerous adverse effects that have been observed using scientific studies and news sources that are discussed below.


Islamic fasting has significant harmful affects on health, national economy and productivity, safety (higher rate of traffic accidents) and social behavior. Health affects include heat stress, dehydration and nutritional status of lactating women, among others. It must be noted that medical fasting is different from Islamic fasting and can have benefits.


The following study in Morocco found that irritability increased during Ramadan:
Kadri N, Tilane A, El Batal M, Taltit Y, Tahiri SM, Moussaoui D
Abstract

OBJECTIVES: We hypothesized that people in Morocco are more irritable during the month of Ramadan than during the rest of the year. Our objectives were to measure irritability in fasting Muslims during the month of Ramadan, to describe its various modes of expression, and to examine risk factors for this irritability.

METHODS AND SUBJECTS: We studied 100 healthy volunteers during the month of Ramadan for two successive years (1994 and 1995). All subjects were male (mean age, 32+/-5.8 years), and 51% of them were smokers. Irritability was assessed over a 6-week period (before, four times during, and after the end of Ramadan). We assessed both subjective (visual analog scale) and objective irritability. We also recorded the consumption of psychostimulants, duration of sleep, and anxiety level as measured by the Hamilton Anxiety Scale.

RESULTS: Irritability was significantly higher in smokers than in nonsmokers before the beginning of Ramadan. It was higher in both groups during the Ramadan month. Irritability increased continuously during Ramadan and reached its peak at the end of the month. Consumption of psychostimulants (coffee and tea) and anxiety level followed the same pattern. Smokers and nonsmokers had a similar pattern of irritability over time, but irritability increased more in smokers than in nonsmokers.


Dehydration:

One study finds that the incidences of dehydration rise during the month of Ramadan:

PHYSIOLOGICAL FUNCTIONS
Evidence of hemoconcentration and dehydration has been found during Ramadan (El-Hazmi, Al-Faleh, & Al-Mofleh, 1987; Kayikcioglu et al., 1999; Ramadan et al., 1999; Schmahl & Metzler, 1991; Sweileh et al., 1992).

Restricted fluid intake, leading to disturbance in the fluid balance, is likely to cause these conditions. In the initial stages of dehydration, the clinical signs are tachycardia, tiredness and malaise, headaches and nausea. Middle-aged or more elderly persons are usually more prone to the effects of dehydration (Schmahl & Metzler).


Dehydration is indicated by the increase of several serum biochemical parameters (El-Hazmi et al., 1987; Ramadan et al., 1999; Schmahl & Metzler, 1991; Sweileh et al., 1992). The increase in uric acid, however, should especially be noted (El-Ati et al, 1995; El-Hazmi et al., 1987; Fedail et al., 1982; Schmahl & Metzler, 1991), because hyperuricemia is one of the known sequelae of prolonged fasting (Murphy & Shipman, 1963).

Hyperuricemia is associated with reduction in glomerular filtration rate, decrease in uric acid clearance and alterations in the renal transport of uric acid (Murphy & Shipman).