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Comment Re: Absolutely works for a lot of people. (Score 1) 226

But in terms of weight loss they are the same

Right, but in terms of other things, they are not the same. And those other things have an influence on your desire to eat.

Simple example: your muscles can run on glucose, and fatty acids. Each of those fuels has a different metabolic pathway, requiring a different set of enzymes to help with the reactions. Your body will adapt by making just the enzymes it needs, and it won't make the enzymes it doesn't need. Suppose you eat a high carb diet, you have all the enzymes for burning glucose, and much fewer of the enzymes to burn fat. Now you want to lose some weight, and start counting calories, and cut some of those carbs.

What will happen is that you get less energy, because despite the surplus of body fat, the metabolic pathway is not optimized to use it. Improving this pathway, by building more enzymes, and restructuring mitochondria and the oxygen delivery (fat also needs a bit more oxygen for same ATP), can take months. Before those months are over, most people will have abandoned their diet.

Now, if you don't restrict calories, but you trade some of those carbs for fat and protein, you won't feel so hungry and deprived, and despite not having the same kind of energy, may not be as likely to quit your diet. Some of the protein can be converted to glucose as well, so this can help to make you last longer. If you can follow this diet for a while, then your body will gradually adapt to get better at burning fat for energy. Once you reach that stage, it is likely you will automatically choose to cut down on the calories.

Comment Re:The planet needs less people (Score 1) 201

Someone doesn't understand genetics. In the US, in just 60 years [statista.com] we've seen a drop in family size by 15%.

In just 60 years, we've managed to kill a lot of bacteria too, but that doesn't mean they can't evolve to grow resistant to antibiotics and come back.

Is your contention that our genes will modify so fast that we will now have a biological imperative to cut our breeding in half?

They don't have to. The genes for big families already exist. They just need to outgrow the genes for small families. And they will get more effective when combined with other genes for big families, which also exist in other people. This combination will happen automatically when the small families die out.

Seriously, it's not genetics - it's economy. Improve the economy, you'll cut population growth. Every time.

Every time ? How many times have you tried it ?

Comment Re:So they ate less and lost weight? (Score 1) 226

Was it compared to people who just ate 8.6% fewer calories to see if there was any difference?

That would not be a fair comparison, because you'd be a comparing a group that got instructions with a group that successfully did something.

To make it fair, you should compare a group of people that are told to eat in a 10 hour window with a group of people that are told to eat less.

Comment Re:The planet needs less people (Score 1) 201

So family size is dictated by genetics, not environment?

It's dictated by both, obviously. This means that if you change the environment to promote small families, that genes will adapt and recombine.

It's survival of the fittest. In this case, the fittest are the ones with the biggest families. For some mysterious reason, a lot of folks have trouble grasping this most basic concept of evolutionary biology.

Comment Re:Spare us the Malthusian bullshit. (Score 3, Insightful) 201

Population is still growing, despite the growth slowing down, and it's still growing rapidly in plenty of places.

Billions of people only consume minimal resources, and they want more.

A lot of resources are already being used up quicker than they are replenished, including fossil fuels, topsoil and fossil water.

Comment Re:Climate change news! (Score 1) 201

Even with their big arse home Obama has done more to reduce climate change that you ever will in your crappy little life

I will support his national policy, but I'm going to follow his example as much as possible in my own crappy life, and not give a shit about anything until forced by law. Seems fair.

Comment Re:The planet needs less people (Score 1) 201

You just need for the *average* family to have fewer children.

That reasoning is flawed. If, for various reasons, some people are "resistant" to the 3 mentioned parameters for low childbirth, and still have big families, then it is likely that they will pass on some of this resistance to their offspring, and they will get bigger families too. Even worse, men with a desire for a large family will seek out women with the same desire, and they will combine their genes, increasing the chance that their offspring will end up with an even better combination.

You cannot compensate for that by also having families with 0 children, because their particular set of genes won't be here next generation.

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