There are only 3 macro-nutrients: fat, proteins and carbohydrates.

If you go low fat, you necessarily go low protein too, so you need to replace that with carbohydrates. Even more, you now need "fortified" carbohydrates to get the needed B vitamins and other nutrients usually found in fatty foods, and those will be refined carbohydrates; which is what the American Health Association now recommends. Yes, they actually recommend that people should eat enriched cereals and other bullshit like that.

A high carbs diet made of "healthy, complex carbs" is a myth ;-)

> he gets furious when he sees doctors advocating the opposite, a trendy practice he believes speeds aging.

You cannot claim that without evidence. Nutrition is at this point like alchemy and I won't trust furious alchemists.

Valter Longo is a tenured professor that's been nominated for a Nobel Prize based on his work in nutrition and fasting. I'd hardly call him an alchemist.

There are lots of us living very healthy lives on this "mythical" high carb diet. The Okinawans, for example, before their diet was corrupted by processed western foods, got 85% of their calories from sweet potatoes and were the healthiest and longest lived people in the world.

https://fanaticcook.com/2015/03/14/the-diet-of-okinawa-1949-...

The only B vitamin that's difficult to get on a high carb diet is B12. But that's only because we've removed the bacteria that produce it from our diet by sterilizing our water supplies and improving food hygiene. Animals also get it from bacteria and a lot of commercial meat has added B12. Check here for an exhaustive list of B vitamin sources:

https://www.onegreenplanet.org/natural-health/b-vitamins-how...

> Valter Longo is a tenured professor that's been nominated for a Nobel Prize based on his work in nutrition and fasting. I'd hardly call him an alchemist.

Sorry but nominations for Nobel prizes are kept secret for 50 years. I highly doubt he was nominated the same year he was born.

[0] https://www.nobelprize.org/nomination/medicine/

Why would you need to go low protein with low fat? High carb and high protein is pretty common.

>If you go low fat, you necessarily go low protein too, so you need to replace that with carbohydrates. Even more, you now need "fortified" carbohydrates to get the needed B vitamins and other nutrients usually found in fatty foods, and those will be refined carbohydrates; which is what the American Health Association now recommends. Yes, they actually recommend that people should eat enriched cereals and other bullshit like that.

'B vitamins' is very vague. Are you talking about B12? If so, farm animals are supplemented with that anyway - so it's just supplements with more steps. Also, once you hit 40-60 most people have problems absorbing enough B12 and should be supplementing regardless of what they eat.

>A high carbs diet made of "healthy, complex carbs" is a myth ;-)

Hmm, how so? The benefits of HCLF are well documented

Benefits of HCLF:

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4691673/

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3967195/

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4073139/

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4245565/

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4583329/

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4844163/

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2677007/

Low Carbohydrate Diets and mortality:

http://www.ncbi.nlm.nih.gov/pubmed/20820038

Why healthy complex carbs are a myth?