Category Archives: Fasting

Is Fasting Healthful? Dr Sigurdsson Reviews the Evidence

This dude probably went days without food

Dr Axel Sigurdsson published an epic post on intermittent fasting early in 2020. I don’t doubt anything in it although I haven’t yet taken a deep dive into the subject like he has. I touched in it here, here, here, and here. I’ve done some 24-hour fasting myself (here and here).

From the good doctor:

Animal studies suggest that intermittent fasting may have several health benefits. Some of these benefits, in particular, the effects on obesity, type 2 diabetes, and cardiovascular risk factors, have been confirmed in studies on humans.

However, the popularity of intermittent fasting within the general public is in stark contrast with the gaps in evidence on the clinical benefits of this approach.

Source: Intermittent Fasting and Health – The Scientific Evidence

Steve Parker, M.D.

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Real-World Comparison of Paleo, Mediterranean, and Intermittent Fasting Diets for Weight Loss

New Zealand researchers didn’t find much difference in outcomes between the three diets: intermittent fasting, Mediterranean, or paleo.

I don’t have the full article so know few details about the diets. For instance, there are many different intermitting fasting diets: which one did they use?

250 overweight adults chose which diet they wanted to follow for 12 months. Participants got a 30-minute educational session on their chosen diet and then were set loose. They may also have chosen “standard exercise” or high-intensity interval training.

From the report abstract:

RESULTS:

Although 54.4% chose IF [intermittent fasting], 27.2% Mediterranean, and 18.4% Paleo diets originally, only 54% (IF), 57% (Mediterranean), and 35% (Paleo) participants were still following their chosen diet at 12 mo (self-reported). At 12 mo, weight loss was -4.0 kg (95% CI: -5.1, -2.8 kg) in IF, -2.8 kg (-4.4, -1.2 kg) in Mediterranean, and -1.8 kg (-4.0, 0.5 kg) in Paleo participants. Sensitivity analyses showed that, due to substantial dropout, these may be overestimated by ≤1.2 kg, whereas diet adherence increased mean weight loss by 1.1, 1.8, and 0.3 kg, respectively. Reduced systolic blood pressure was observed with IF (-4.9 mm Hg;  -7.2, -2.6 mm Hg) and Mediterranean (-5.9 mm Hg; -9.0, -2.7 mm Hg) diets, and reduced glycated hemoglobin with the Mediterranean diet (-0.8 mmol/mol; -1.2, -0.4 mmol/mol). However, the between-group differences in most outcomes were not significant and these comparisons may be confounded due to the nonrandomized design.

CONCLUSIONS:

Small differences in metabolic outcomes were apparent in participants following self-selected diets without intensive ongoing dietary support, even though dietary adherence declined rapidly. However, results should be interpreted with caution given the exploratory nature of analyses.

Source: Intermittent fasting, Paleolithic, or Mediterranean diets in the real world: exploratory secondary analyses of a weight-loss trial that included ch… – PubMed – NCBI

I probably won’t bother to read the full report. You’re welcome to it for $35 USD. The abstract doesn’t convince me it’s worth my time and money.

Steve Parker, M.D.

Click pic to purchase book at Amazon.com. E-book versions available at Smashwords.com.

Mild Intermittent Fasting May Be Good for You

Have you ever tried to catch a wild rabbit by hand?

Eating within a 10-hour window shouldn’t be too hard. Breakfast at 7 AM, finish dinner by 5 PM. That’s  right, we don’t need to be eating every 3–4 hours. Do you think our ancestors have been eating three meals a day for the last 200,000 years? I don’t. The probably went 24–48 hrs without much food on a regular basis.

From LA Times:

In an early effort to explore the benefits of daily fasting in humans, researchers have found that people who are at high risk of developing diabetes improved their health in myriad ways when they ate all of their meals over a span of just over 10 hours, then fasted for the remainder of their 24-hour day.

Source: Variant of intermittent fasting improved health in new study – Los Angeles Times

Steve Parker, M.D.

Click pic to purchase book at Amazon.com. E-book versions available at Smashwords.com.