Tag Archives: fat

Steak Fam and the Wild Mustard Plant

There are many different types of beef cattle which have been selectively bred for specific qualities or properties.

A lot of info here, “Knowing It: Beef Cattle

 

 

Scottish Angus x Longhorn = Black Angus.  Apparently, Longhorn beef was unpleasant and tough but they bred well.  Scottish Angus beef was tender but they didn’t breed well.  Cross ’em and problems solved.

Hereford cattle are inexpensive and were bred for feed efficiency.

 




 

Piedmontese cattle are double-muscled and less marbled than Angus, and they’re often crossed because it’s hard to give birth to a fully double-muscled babe.  Seems like it would help if momma was the Piedmontese, too.

 

 

Wagyu: main breeds are Japanese Black, Japanese Red, Kobi, and Sandai.  Allegedly fed beer and given regular massages LOL

Angus vs. Wagyu: look at that marbling –>

 

 

More info from American Cowboy and Steak Perfection.  And a comprehensive list of breeds here.

 

Needless to say, we aren’t eating the same animals as our ancestors: all of this selective breeding… it’s kind-of-like GMO.  Also, we would’ve been domesticating the slow and less intelligent animals because the fast and smart ones would’ve gotten away.  I’m not saying this is a bad thing, just that it’s not what the hunters were a’huntin way back when.

If an animal has been bred for a trait that increases growth hormone (GH); is it really that different from an animal treated with GH to induce that trait?  [rhetorical]

 




 

Same goes for plants.  Check out this awesome infographic:

 

Thank you for all you’ve given us, Wild Mustard Plant.

That’s all for now!

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Fish oil supplements

A fattier cut of salmon (think: skin-on, high skin-to-flesh ratio, etc.) has about ~2 g EPA & DHA (fish oil, FO) per 100 g, or ~10 g per pound.  Average price (around here, this time of year) is ~$10 / lb.  So, about $1 / gram FO, in 50 g salmon.  See also, the Fish Blog.

 

As reasoned in The poor, misunderstood calorie, FO from seafood is roughly 4x more effective than FO from supps.  There was no head-to-head study comparing seafood to supps, but a study on seafood with half the dose of FO was twice as efficacious as a study on supps.  Half the dose + twice as efficacious  = 4x.  The greater bioavailability and assimilation of FO from seafood can only explain a small part of this… I suspect other nutrients in seafood explain another part, and displacement of other calories by the protein in seafood further explains another part.  But this post is about FO per se.

 

 




 

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LCHF negates performance benefit of training. O_o

It takes about 3 weeks to become fully ketoadapted and you don’t really get more ketoadapted thereafter, at least as per max fat oxidation rates (which seems a pretty good surrogate, imo).

Important point: “Athletes who drop carbs cold turkey suddenly suck.”  And performance usually recovers by around week 3.  This has been confirmed in nearly every proper study on the subject, in a variety of contexts.

 




 

Which brings me to the latest alleged slam on keto & physical performance:

Low carbohydrate, high fat diet impairs exercise economy and negates the performance benefit of intensified training in elite race walkers (Burke et al., 2016)

 

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HANGRY! (part deux)

Effects of diet composition on postprandial energy availability during weight loss maintenance (Walsh et al., 2013)

Now, we’re getting somewhere!

3 diets (carbs 10%, 40% or 60%; protein was higher in the lowest carb group). Four weeks. CROSSOVER.

Then a test meal which approximated the diet assignment. Total “energy availability” in the blood was approximated by measuring the calories in blood glucose, free fatty acids, and ketones.

 

energy availability and metabolic rate

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VEG*N

I’m not vegan but the “Anti-Vegan Because B12” argument is lame.  B12 insufficiency is largely due to malabsorption, not steak deficiency.

Also, oysters SMOKE meat for B12. Seriously, over a full day’s supply in one medium-sized oyster. Can meat do that?

Many people take supps, but somehow anti-vegans think B12 invalidates veganism.  It doesn’t.  Also, 1) tons of B12 in oysters; 2) nori B12 works in humans and rats; and 3) mushrooms still haven’t been ruled out as a legit source.  Whether you consider these foods vegan or not is a different story.  Many non-vegans are B12-deficient, too -> all the steak in the world won’t help if you can’t absorb it.

I’m not undermining the severity of B12 deficiency, just noting some basic facts.

My bias: things like T2DM, obesity, and even some cancers and mood disorders are due primarily to circadian arrhythmia, sleep, & LIGHT… and secondarily to diet.

When it comes to diet, mostly plants plus some animal is optimal for humans in our modern #context, regardless of which Ice-Age Paleo-Fairy Tale™ you subscribe to.  Things like sleep, LIGHT, and activity, among others, seem way more important than debating historical [theoretical] dietary minutiae.

Lastly, this particular debate isn’t “vegan vs. keto.”  THEY’RE NOT MUTUALLY EXCLUSIVE.  “Eco-Atkins” is a thing.  Animals provide a convenient source of LC protein, but it can be done without them.

 

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The poor, misunderstood autophagy

Autophagy isn’t a big deal in the way some Internet Bro’s think it is.  Yes, Dr Ohsumi received a Nobel Prize for cracking deeply into this nut, but that in no way means “intermittent fasting is awesome because autophagy.”  Autophagy isn’t awesome like that.

Alternate title: The dark side of autophagy.

For example: Autophagy contributes to muscle wasting in cancer cachexia (Penna et al., 2013)

Cachexia (muscle wasting) is one of the leading contributors to poor quality of life in cancer patients.  Thanks, autophagy.

“Autophagy is the major process for degradation of cellular constituents, its rate being enhanced under stress conditions leading to organelle damage…”

 

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The Hunger-Free Diet(s)

It started out as “lose weight without hunger on LCHF” and went all the way to “effortless fasting on keto.”  Works for some and it might be true, but the same can be said for low fat diets!  The key, I think, in both contexts, is simple: fewer processed & refined foods… something the Paleo movement got right, imo (although I still think many low-calorie sweeteners are way less unhealthy than HFCS & sugar).

The logic:

1) add “good calories” like almonds to your diet and appetite spontaneously compensates by eating less other stuff: energy neutral

2) you don’t compensate for added “bad calories” like sugar-sweetened beverages: positive energy balance

3) remove bad calories from your diet and you don’t compensate by eating more other stuff: negative energy balance

 

Book: Good Calories, Bad Calories

 

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Non sequiter dietary fats

Tl;dr: SFA and DHA

Essential fatty acids?  Well, there’s really only one, DHA, and we really only need a gram or two.  In other words, our entire requirement for dietary fat can be met by about 2% of total calories (plus a few extra grams to accommodate fat-soluble vitamins) (plus DHA is never the sole fat in a food, so you’d be getting a few more grams of other fats, too).  But still, a very low fat diet!  But impractical and probably not very palatable or healthy.

On average, dietary fat comprises about a third of calories, roughly equally divided between SFA, MUFA, and PUFA (slightly less PUFA).

Major sources of SFA are pizza and desserts – no wonder SFA gets a bad rap!

 

cheese-crust-pizza

 

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Discordant insulin sensitivity on a high protein diet

So, we have another “high protein” weight loss study (Smith et al., 2016).  Or really, a “low (0.8 g/kg) vs. moderate (1.2 g/kg) protein weight loss study.”  In brief, it took ’em about 6 months to lose 10% of their starting body weight, then were given 4 weeks of weight stability before “after” measurements were taken.

Important: this was not a contest to see who would lose more weight; they kept going and adjusting food intake until both groups lost 10%.  Not really ad lib, but otherwise a good study design imo.  The intervention was relatively weak (eg, protein 0.8 vs. 1.2 g/kg), but on the plus side, that’s realistic and very “do-able.”  If you’re interested in super-high protein diets (3-4 g/kg), check out research by Jose Antonio.

 




 

Big yet not unexpected finding: the low protein group lost about twice as much muscle than the normal protein group.

 

fat-free-mass

 

The isocaloric normal protein group lost more fat and less muscle than the low protein group.

But then everyone freaked out because the low protein group experienced a significant improvement in muscle/liver insulin sensitivity whereas the normal protein group didn’t:

 

glucose-rate-of-disappearance

 

-The headlines were hilarious, like, “high protein makes weight loss not work anymore.”

-Then some critics jumped the shark and blamed it on “liquid calories,” because whey protein shakes are totes non-Paleo, and #JERF.

-TBH, I found more interesting the changes in adipose insulin sensitivity

The normal protein group had the most insulin sensitive adipose of all groups… yet they lost more fat mass despite eating just as much or even slightly more than the other groups.

 

adipose-insulin-sensitivity

 

Does this mean they’re doomed to regain the weight?  I don’t think so, as high dietary protein is one of the strongest predictors of weight loss success long-term.

HERESY!  the low protein group had: 1) lower basal insulin than the normal protein group; 2) lower adipose insulin sensitivity; 3) ate less (NS); yet lost less fat mass.

 




 

In other words, the normal protein group had higher basal insulin, more insulin sensitive adipose tissue, and slightly higher food intake (NS).  According to the insulin model, they should’ve lost less fat mass than the low protein group, but they didn’t.

Is this another chink in the armor of the insulin model?

The truth seems to be: people lose weight on both LC and LF diets by giving up junk food.  On LC, this is accomplished by giving up carbs; on LF, this is accomplished by switching to better carbs.  Some people adhere better to one diet or the other.  Maybe insulin sensitivity has something to do with it.

Insulin from high protein: not bad?
Insulin from good carbs: not bad?
Junk food: no bueno.
So maybe just maybe it’s not just ze insulin…

 




 

Back to the protein…

This was not sorcery; it’s been seen before in a variety of different paradigms: dietary protein has a profound impact on nutrient partitioning.

Yes, even when it’s liquid calorie insulinogenic whey protein isolate bro-shakes.

Yes, even when it’s not crazy-high levels of protein…  seriously, 1.2 g/kg is not “high”

 

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Past blog posts on [the non-sorcery of] dietary protein:

Holiday feasts, the freshman 15, and damage control

Dietary protein, ketosis, and appetite control.

Nutrient Partitioning: …a *very* high protein diet.

Protein “requirements,” carbs, and nutrient partitioning

Cyclical ketosis, glycogen depletion, and nutrient partitioning

Meal frequency, intermittent fasting, and dietary protein

Muscle growth sans carbs

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Keto myths & facts

:::begin rant:::

Trigger warning?  Maybe.

Disclaimer: I’m pro-LC (P<0.05), but not anti-LF because LF works better than LC for some people.  And with the exception of things like keto for neurological issues, I think macros take a back seat to many other factors.

Myths: carbs cause insulin resistance (IR), diabetes, and metabolic syndrome.  Carbs are intrinsically pathogenic.  If a healthy person eats carbs, eventually they’ll get sick.

And the only prescription is more keto.

cowbell

And of course all of this could’ve been prevented if they keto’d from the get-go.

Proponents of these myths are referring to regular food carbs, not limited to things like Oreo Coolattas (which would be more acceptable, imo).  Taubes, Lustig, Attia, and many others have backed away from their anti-carb positions, yet the new brigade proceeds and has even upped the ante to include starvation.  Because “LC = effortless fasting?”

Does this sound sane?

“No carbs ever,
no food often…
otherwise diabetes.”

oreo-coolatta

no one in their right mind would say lentils & beans cause diabetes

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