The Best And Practical Way To Retune The body

 

                           The Best And Practical Way To Retune The body

The Best And Practical Way To Retune The bodyTo understand how the body reacts to a lack of food, you could start by looking at what happens to newborns. Newborns can’t sleep through the night because they need to eat every few hours. They don’t produce enough glycogen, the body’s form of stored sugar, to make energy.

“Glycogen is necessary for thinking; it’s necessary for muscle action; it’s necessary just for the cells to live in general,” says Dr. Naomi Neufeld, an endocrinologist at UCLA.

Neufeld says most adults need about 2,000 calories a day. Those calories make energy or glycogen. Neufeld says it doesn’t hurt — it might even help the body — to fast or stop eating for short periods of time, say 24 hours once a week, as long as you drink water.

“You re-tune the body, suppress insulin secretion, reduce the taste for sugar, so sugar becomes something you’re less fond of taking,” Neufeld says.

Eventually, the body burns up stored sugars, or glycogen, so less insulin is needed to help the body digest food. That gives the pancreas a rest. On juice diets recommended by some spas, you may lose weight, but your digestive system doesn’t get that rest.

Mark Mattson, a scientist with the National Institute on Aging, says that when we convert food into energy, our bodies create a lot of byproducts we could do without, including free radicals.

“These free radicals will attack proteins, DNA, the nucleus of cells, the membranes of cells,” Mattson says. “They can damage all those different molecules in cells.”

And even if you don’t fast, Mattson says that simply limiting the calories you consume may be beneficial. He points to the studies on how rats and mice are feed every other day.  Comparing with the normal daily feeding diets, there has a reduction in disease among the rats that severely restricted their food intake. Mattson says those findings hold promise that humans could also benefit from partial fasting.

Mattson thinks partial fasting has numerous benefits, from improving glucose regulation, which can protect against diabetes, to also lowering blood pressure. Some animal studies have also shown that partial fasting has very beneficial effects on the brain, protecting against Alzheimer’s, Parkinson’s, and stroke.

Partial fasting may even extend lifespan because eating less sends a message to the cells of the body that they should conserve and use energy more efficiently.

“When they’re exposed to a mild stress, [the body’s cells] sort of expect that maybe this is going to happen again,” Mattson says. “So maybe next time I may have to go longer without food, so I’d better be able to deal with that when it comes on,”

Mattson says that process is similar to the way muscles get built up when they’re stressed by exercise. Mattson adds that because complete fasting is difficult to study and there is little actual research comparing people who fast with those who don’t, it’s not clear whether complete fasting (water only) is also beneficial.

Proponents say small, short-term studies find that complete fasting lowers blood pressure and reduces cancer risk. But Dr. Naomi Neufeld worries that complete fasting could be harmful. After the first few days of liquid only, the body uses up all its stored glucose to make energy. And then it turns to other sources, including fat and muscle.

“The main issue is that the target in long-term fasting is a muscle because the muscle has readily available amino acids which can convert to glucose right away,” Neufeld says. “In that way, your brain has never deprived of needed glucose.”

The problem, Neufeld says, is that when muscle breaks down, potentially toxic proteins are released. These proteins are partly composed of nitrogen, and too much nitrogen in the body can be toxic to the kidneys and liver. That’s when starvation is officially underway.

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Posted on by Tom Coghill

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