MCT Supplementation - Claims, Myths, and the Truth
Medium-chain
triglycerides are very different from the long chain triglycerides we most
commonly consume. They occur naturally in coconuts, and MCT oil (usually
coconut oil put through a centrifuge) is a relatively affordable supplement.
Claims:
-Aids in fat loss
-Prevents fat gain
-Stimulates muscle growth
-Prevents arteriosclerosis
(hardening of the arteries due to excess
fat and cholesterol build up)
-Improves immune function
-Improves Cognitive function
What the Science tells us:
As a fat loss aid:
Thought 1:
mct
öl are less calorically dense than Long chain triglycerides (8.3 calories
per gram vs 9), therefor replacing LCTs in the standard western diet with MCTs
would lead to a greater deficit, and therfore greater fat loss.
Let's say you replace half of your fat
intake with purely MCTs, and lets assume you are taking in 100g (round figure)
of fat per day. Originally your daily caloric intake from fat would be 900
calories. If you replace half those fats with MCTs, your new caloric intake
from fat will be 865 calories. Contact mct pulver öl.
I'd venture to say this is impractical and
statistically insignificant. This claim is invalid.
Thought 2:
MCTs increase energy expenditure (metabolic
rate).
There have been quite a few studies done on
this subject, all of which point to the same conclusion. While technically MCTs
DO increase energy expenditure, the effect is very small. When it comes to
measuring changes in body composition effected by this, the results are
statistically insignificant.
While this is technically true, it's
ability to raise energy expenditure enough to create a larger caloric deficit
is minuscule.
Thought 3:
MCTs are highly satiating, so they work
well as an appetite suppressant.
The theory is that MCTs are difficult to
get in our diet, so when we have them in abundance our brain tells us we're
full. The brain uses Glucose as a primary energy source, and when blood sugar
drops our brain gets tired and tells us we need more fuel. However, our brain
can also use ketone bodies as energy, and this energy source lasts much longer
than glucose. MCTs convert quickly and easily to ketone bodies. So, this means
our brain has fuel for a longer period of time post-feeding with MCTs than
traditional higher-carb meals.
This claim is valid. Anecdotally, I can say
that when I put coconut oil in my coffee, I dont have the urge to eat lunch until
after my work day (typically 10-12 hours after breakfast). When I skip the
coconut oil, I take a lunch break because I feel hungry by 5-6 hours
post-breakfast.
As a fat-gain inhibitor
Thought:
MCTs are absorbed quickly and efficiently,
and this increased metabolic turnover prevents calories from MCTs to be stored
as fat.
This claim is as invalid as the claim that
insulin spikes lead to fat gain. Fat gain is a function of a caloric surplus.
MCTs WILL store as adipose tissue (fat) if you are in a surplus.
As a muscle-building supplement
Thought: Since MCTs are so easily converted
into ketones, your body will spare protein to be used solely for protein
synthesis (muscle gain) instead of energy.
The natural male can synthesize about 5-8g
of protein per day. Conscious strength trainees consume about 1g of protein per
lb of bodyweight. There is plenty of extra protein to be used as energy after
the maximum amount of protein synthesis possible has taken place.
Also, unless you are in a ridiculous deficit,
protein "sparing" is not something one should be concerned with.
This claim is invalid.
As an arteriosclerosis preventative
Thought:
Arteriosclerosis occurs when fat and
cholesterol build up in the arteries and cause hardening. MCTs are more efficiently
converted into energy than LCTs, therefor lead to less artery clogging muck.
If someone is on a high enough fat diet to
lead to arteriosclerosis replaces 50% of their fat intake to MCTs, the chances
of build up in arteries greatly decrease.
This claim is valid for those on extremely
high fat diets.
As an immune system enhancing supplement
Thought:
The biological mechanism behind this is not
known (as far as I know).
Studies on rats have shown that rats given
MCT serum injections are more resilient to autoimmune disease.
Not enough evidence to support this claim
exists.
As a Cognitive enhancing supplement
Thought:
Ketones are a highly efficient energy
pathway for the brain, and MCTs convert to ketone bodies easily. Therefore, the
brain functions better.
This is an interesting claim, because some
studies suggest that MCTs help reduce the symptoms of mental conditions such as
Alzheimer's.
Not enough evidence exists for me to take a
stance either way, however Alzheimer's and other age-related mental diseases
have been connected to metabolic problems like diabetes. This makes sense,
because if blood sugar drops, the brains primary energy pathway is limited.
Studies have shown that epileptic people respond very well to ketogenic (low
carb) diets, because this changes the brains primary energy pathway from
glucose to ketones. Theoretically, since MCTs raise blood-ketone concentration,
it could have a similar effect.
Conclusion: For the average person, MCT
supplements may be beneficial for appetite suppression and cognitive function.
And, it tastes good in coffee! I would recommend coconut oil or MCT oil to
anyone having issues maintaining a caloric deficit, or to those who need to go
extended periods of time without food.
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