Why is Fasting Linked to Temporary Lower Blood Pressure?

A woman has her blood pressure taken at a World Hypertension Day event in Amman, Jordan, May 14, 2010. Reuters
A woman has her blood pressure taken at a World Hypertension Day event in Amman, Jordan, May 14, 2010. Reuters
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Why is Fasting Linked to Temporary Lower Blood Pressure?

A woman has her blood pressure taken at a World Hypertension Day event in Amman, Jordan, May 14, 2010. Reuters
A woman has her blood pressure taken at a World Hypertension Day event in Amman, Jordan, May 14, 2010. Reuters

Among the many benefits that have been associated with fasting is a lower blood pressure, but experts are still confused about the reasons behind this effect.

Dr. Rami Al-Jafar, from Imperial College London, attributes this lower blood pressure to metabolic changes, while an Egyptian expert cited three other reasons.

Two years ago, Dr. Rami Al-Jafar led a study that was published in the American Heart Association journal (AHA), on how fasting helps achieving a temporary lower blood pressure but without highlighting the reasons.

During the study, researchers analyzed 85 people fasting during Ramadan between the ages of 29 and 61 from five mosques in London. Scientists measured their systolic (the top number) and diastolic (the bottom number) blood pressure before and after Ramadan.

Participants were also asked to keep food diaries for three days before and during Ramadan.

The study found an average reduction of 7.29 mm Hg in systolic blood pressure and 3.42 mm Hg in diastolic blood pressure in the days after Ramadan.

The results were correct among the healthy participants, and those suffering from high blood pressure and diabetes.

In an article published on the AHA website, Dr. Jafar speculated that “the reductions in blood pressure result from a metabolic change.”

“After eight to 12 hours of fasting, the body begins burning ketones rather than glycogen, which can help lower the blood pressure,” he explained. Ketones are a type of chemical that your liver produces as an alternative source of energy, while Glycogen is a branched polymer in which glucose is the main building block, and serves as an energy storage.

Many experts agree with Al-Jafar on the significant role of the metabolic change in lowering blood pressure, suggesting that other reasons might affect too.

Sameh Abdulalim, internal medicine expert at the Egyptian health ministry, said “limiting calories while fasting is associated with lower blood pressure. Fasting is often linked to consuming less calories, which could help explain some its effects.”

“Among the other suggested reasons are the relaxation of the digestive system due to fasting, unlike its always-active state on regular days,” he told Asharq Al-Awsat.

“Fasting also affects blood pressure through the gut microbiome, a set of bacteria that live in the digestive track, and affect digestion and the immune system,” he concluded.



Fires Engulf Türkiye’s Mediterranean Coast as Government Declares 2 Disaster Zones

People stand next to smoke rising from the wildfire in the Aksu district of Antalya, a Mediterranean city in southern Türkiye, July 25, 2025. (Reuters)
People stand next to smoke rising from the wildfire in the Aksu district of Antalya, a Mediterranean city in southern Türkiye, July 25, 2025. (Reuters)
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Fires Engulf Türkiye’s Mediterranean Coast as Government Declares 2 Disaster Zones

People stand next to smoke rising from the wildfire in the Aksu district of Antalya, a Mediterranean city in southern Türkiye, July 25, 2025. (Reuters)
People stand next to smoke rising from the wildfire in the Aksu district of Antalya, a Mediterranean city in southern Türkiye, July 25, 2025. (Reuters)

New wildfires broke out on Türkiye’s Mediterranean coast Friday, as the government declared two western provinces in the country to be disaster zones.

Images showed flames and smoke billowing into the sky close to high-rise apartment buildings in Antalya, where local and foreign visitors flock during the summer months.

Homes were evacuated in the city center and the outlying district of Aksu as the fire advanced, privately owned news agency DHA reported. Firefighters struggled to extinguish the blazes before strong winds could spread the fire, which closed a major coastal road.

Further along the coast, homes in the city of Manavgat were also threatened.

Local residents with hoses and buckets rushed to assist firefighters as water-dropping helicopters and planes also battled the flames. Police water cannons and municipal water trucks were also enlisted in the firefighting efforts.

Antalya Gov. Hulusi Sahin said that the fires were under control apart from one in Aksu, which was "showing a tendency to grow," and another in Gazipasa, east of Manavgat.

"The fires were truly disturbing and dangerous, because they occurred in city centers, among houses," he said. "We evacuated some of our homes ... There are no deaths or injuries."

At 46.1C (115F), July temperatures in Antalya city were the highest for the month since records began in 1930.

Interior Minister Ali Yerlikaya, meanwhile, said Friday that Izmir and Bilecik provinces had been declared "disaster areas affecting public life," one step below the most serious level of emergency.

Between June 27 and Thursday, residents from 120 neighborhoods nationwide were evacuated, Yerlikaya added, and more than 12,000 workers under the ministry’s authority, such as police and rescue staff, had fought the fires.

In a social media post, the minister said 311 homes had been destroyed or seriously damaged during the monthlong blazes and 85 temporary housing units were set up across three western provinces for those made homeless.

Speaking after Friday prayers, President Recep Tayyip Erdogan said that Türkiye was "faced with a truly great disaster." He said that 25,000 personnel were fighting fires across the country, assisted by 27 planes, 105 helicopters and 6,000 ground vehicles.

Türkiye has faced widespread outbreaks of forest fires since late June. Thirteen people have died, including 10 rescue volunteers and forestry workers killed Wednesday in a fire in Eskisehir, western Türkiye. The funerals for the 10 were on Thursday.

Temperatures above seasonal norms have been exacerbated by strong winds and dry conditions, resulting in dozens of wildfires.

East of Antalya, fires broke out in Adana and Mersin on Friday. Elsewhere in the country, firefighters continued battling blazes in Eskisehir and nearby Karabuk that have been raging for several days.

Albania battles fires

The heat wave in the eastern Mediterranean region saw 1,000 firefighters and soldiers battle flames in Albania as temperatures reached 42 C (107 F).

In the Albanian city of Elbasan, firefighters have been combating a weeklong blaze in the country’s central mountain forests. Fires have also broke out near the southern border with Greece.

Cyprus aftermath

In the aftermath of one of Cyprus’ worst wildfires in living memory, it wasn’t lost on Cypriot officials that climate change may have been a significant contributing factor to the pace and ferocity of the flames.

Both government spokesman Constantinos Letymbiotis and Fire Chief Nicos Longinos referred to the arid conditions, with temperatures hitting 44 C (111 F) and very strong winds that quickly overwhelmed fire crews.

Even 14 firefighting aircraft couldn’t douse the multiple, fast-moving fire fronts quickly enough.

Cyprus is in its third year of minimal winter rains on which it relies for drinking water and for agricultural purposes, even as the government is revving up additional desalination projects.

The fire that moved at breakneck speed left two dead, forced the evacuation of 16 communities, scorched dozens of homes and destroyed many orchards and farms.

Quizzed by a reporter about criticisms that the Fire Service didn’t move quickly enough, Longinos was on the verge of tears when he said that he and all his firefighters have taken an oath to "give their lives" if need be to save lives and property.