Getting Started With ADF (Alternate Day Fasting): How To Ease Into ADF
Watch on YouTubeVideo summary
Dr. Oz introduces his new series dedicated to helping individuals successfully start and sustain Alternate Day Fasting (ADF), addressing those who have struggled with past attempts or cannot maintain their plans long enough to see results. He identifies two common pitfalls: attempting too much too soon, which leads to early abandonment after minor setbacks, or starting well but reverting to old habits like missed workouts and cheat meals that undo progress. Drawing from his own journey of losing significant weight over a year using ADF, Dr. Oz emphasizes that while the goal is an extended fasting schedule, most people must ease into it gradually because their bodies need time to adapt metabolically. This adaptation process involves shifting from burning glucose for fuel to becoming efficient fat burners by increasing mitochondria and enzymes required for ketone production, a transformation supported by scientific studies showing improved respiratory quotients and increased fat oxidation over just two weeks of consistent practice.
The core strategy presented in this first video focuses on six specific steps designed to build momentum without overwhelming the body or mind. The initial step involves stopping all food intake after dinner, leveraging the natural overnight fast that occurs during sleep while avoiding late-night snacking which can disrupt blood sugar levels and hinder fat burning. Following this, individuals are encouraged to eliminate snacks entirely between meals to break the cycle of constant eating every few hours, allowing for larger, more satisfying main meals rather than restricting caloric intake prematurely. As comfort grows with these habits, the next phase involves slowly shrinking the daily eating window by pushing breakfast later and finishing dinner earlier, a process that can be tracked using various tools or simply monitored mentally to extend fasting periods gradually over time.
For those who find it difficult to adhere strictly to an 8-hour feeding window immediately, Dr. Oz suggests several supportive tactics known as "crutches" to bridge the gap until full adaptation occurs. These include staying properly hydrated with electrolytes, utilizing a modified ADF or 5:2 approach where two days per week involve very low calorie intake rather than complete fasting, and incorporating healthy fats like MCT oil into coffee or tea during fasted states to curb hunger without spiking insulin levels. Additionally, he recommends using exogenous ketones as another temporary aid if needed, while also suggesting that for a first full 36-hour fast, keeping the day busy with activities can help distract the mind from food cravings. He stresses that sustainable fasting is more important than "clean" perfection and allows for minor exceptions like sugar-free gum or bone broth if they prevent someone from quitting entirely, prioritizing long-term consistency over rigid rules in the early stages of the journey.
Read the full video transcript
hey everybody Dr o here welcome to my
new series on how to get started with
alternate day fasting or ADF or how to
start over if it hasn't gone well in the
past I am completely humbled by the fact
that I've helped thousands of people see
results with ADF between my videos my
courses my Facebook group and my private
coaching it truly makes my day whenever
I hear from one of you from someone who
has used alternate day fasting to
transform their health and turn their
life life around in the same ways that I
have it's one of the greatest feelings
in the world to be able to help but this
video series is for the people I don't
hear from right the people who can't get
started or don't stick with it long
enough to see results so people who
struggle with ADF generally fall into
one of two categories number one you try
to do too much too soon you make plans
and set goals that you aren't physically
or mentally prepared to achieve
this is you if you struggle to even get
started you might make a little progress
for a week or two but the slightest bump
in the road causes you to fall off your
plan or number two you start out with
plans that you can't stick with long
enough to reach your goals this is you
if you're able to make really good
progress for a few weeks or months maybe
you lose 20 or 30 pounds and you're
cruising but then your old habits start
to creep back in right a missed workout
turns into a missed week of workouts a
cheat meal turns into a cheat month and
the next thing you know you're right
back where you start started you may
even end up heavier than when you began
right I covered why this happens and how
to keep it from happening in my fat loss
Sweet Spot series one of the one of my
favorite video series that I've that
I've done I know this was the case for
me for sure the guy in this picture had
probably lost 500 lbs over the years
years of failed weight loss attempts did
nothing but make me fatter weaker and
more metabolically broken than ever so
the old me was a cautionary tale of what
can happen if you keep trying and
failing and trying and failing without
figuring it out but now I'm living proof
that of what is possible when you find a
plan that you can stick with and you
never give
up I use alternate day fasting to lose
49 lbs in 10 weeks 101.2 lb in 6 months
and 165 lb in a year so we know that
intermittent fasting can work amazingly
well once you adapt to it but getting
started can be the hardest
part right so here perhaps your goal is
to get to an alternate day fasting
schedule that looks like this you know
if you're anything like me you want to
get there want to get close you know
that I kind of modified my Approach but
it was really similar to an alternate
day fasting approach but if you're
anything like me you're starting with
the plan that looks more like this way
too much food way too many meals way too
much snacking way too much junk food
right way too much soda all things I'm
going to cover in this series how we
need to deal with it but this is
definitely going to be a process for
most of you just like it was for me so
in this series I want to highlight the
strategies that will help you get
started the right way and stick to the
the plan long enough to see results the
videos in this series will each address
one or more of the following topics how
to ease into fasting which will be our
big Focus today how to prepare your body
for fasting just as importantly how to
prepare your mind for fasting and then
how to eat to fuel your fasting
success I have one goal in mind for this
series I want each and every one of you
I want to help you make this the last
time you ever need to begin an alternate
day fasting program to lose weight and
transform your
health
so I I want to hear from you before we
dive in right I want to hear from the
ADF veterans that are out there watching
this video what's worked for you did you
ease into fasting or Dive Right In right
what tips do you have for someone who is
just getting started what would you do
differently if you were starting on your
weight loss Journey today so we're all
in this together I would love to hear
your thoughts and maybe I'll even add
them to future videos in the
series first why should we ease even
ease into fasting let's start with this
quote from Benjamin Franklin if you fail
the plan you are planning to fail I
truly believe that in in all areas of
life this video is about easing into
fasting but some people prefer ripping
the Band-Aid off and jumping right into
ADF there is nothing wrong with that if
it works well for you nothing at all
there are certainly pros and cons though
to both approaches jumping right into
longer fasts will actually speed up the
fat adaptation process but it can make
the first few days or weeks really tough
right it's high risk but also High
reward right I I've done both CU I've
had periods where I've gone away from
longer fast and then eased back into it
but when I first started yeah I had I
had started just by diving right in and
and and I was able to do it but I tried
and failed a few times before it finally
stuck and there were some really really
rough moments no doubt so lots of people
find that easing into fasting is a more
sustainable approach allowing your body
to get used to fasting over time will
decrease the chances that you experience
any negative side effects like
hypoglycemia which is low blood sugar
dehydration electrolyte issues or Etc
right it will also give you in your
doctor time to adjust any medications
like insulin or blood pressure pills if
needed right you should obviously always
work with your doctor if you have any
underlying health issues I've worked
with enough people to know that both
strategies can work the key is to know
yourself well enough to decide the best
path for
you so why why is it so hard why can't
we just start fasting why can't we just
go 36 hours without food why is it so
hard in the beginning to put it as
simply as I can you need to transform
your metabolism and rebuild your
metabolism from running on sugar to
running on fat and ketones for fuel this
is a lifechanging process but it takes
your body time to adapt you your cells
need to build more mitochondria the
powerhouses of your cell because you
need more of them if you're going to be
running on fat your your cells need to
increase the number of fat burning
enzymes and just in general your cells
have to get better at running on ketones
and fatty acids for fuel these the the
old fat burning Machinery hasn't been
busy because your body's primarily been
running on glucose refuel if you've been
eating the standard American diet so it
also takes time for your body to go from
the fat storage mode that we hate to the
fat burning mode that we love as our
high insulin levels start to return to
normal so these These are it just T it
takes time for this for these
adaptations to occur maybe you've heard
of the fat adaptation process so here's
my favorite study that explains why
fasting gets easier and more effective
over time so what does the science have
to say alternate day fasting in
non-obese subjects effects on body
weight body composition and energy
metabolism so I'll probably cover this
video in other ways moving forward but
there's a few things that I want to
highlight and pull out of here this
study looked at something called the
respiratory quotient or the RQ you may
also hear it called the respiratory
exchange ratio or the reer but don't
worry there won't be a test this
respiratory quot oent determines whether
your body is in carb burning mode or fat
burning mode it it's actually determined
by measuring how much oxygen you take in
and how much carbon dioxide you take out
so I actually get this done every time I
that I get my resting energy expenditure
test done that I've talked about in in
multiple videos over the years so an
RQ of 0.7 means that your body is
burning 100% fat refuel an RQ of 1.0
means your body is burning 100% carbs
for fuel and an RQ in the middle of 85
means that you're 50/50 you're burning
you're burning a combination of both so
we'll look at what happened to the
respiratory quotient of the of these uh
trial participants rson so here's a
quote respiratory quotient or RQ did not
change significantly from Baseline to
day 21 but respiratory quotient
decreased on day 22 which resulted in an
average daily increase in fat oxidation
so that means that over time they got
better at burning fat for fuel they
became fat burning machines and that's
and that's what we're looking at here so
let's let's actually take a closer look
at the changes that occurred to get
these people into fat burning mode all
right so lots of neat stuff going on
here so you'll see that the uh the white
bars are at Baseline then the striped
Bars were day 21 which was an eating day
remember it's alternate day fasting and
day 22 was a fasting day so you can see
that their blood glucose levels were
stayed pretty similar they just they
dropped down just a little bit this is
actually a good sign that means they
train their body to go to fast for 36
hours at a time time without seeing
blood sugar crashes and this is
something that can occur when people
first start fasting if they Dive Right
In so the glucose glucose changes I
would say are what what it's expected
next we see insulin fasting insulin
decreased an average of 57% this is an
amazing Improvement since insulin is our
key fat storage hormone and most people
are dealing with too much insulin so
their insulin levels came way down next
you can also see that fasting put them
into a state of ketosis and the fat fat
was being mobilized for fuel so you see
that the black bar there that's beta
hydroxybutyrate the the the most
important blood Ketone and then you see
at on the right we have more free fatty
acids so this means that their body was
was releasing free fatty acids
converting fat into ketones to fuel the
brain and other parts of the body and
these fuels were being released and they
were being burned so the corresponding
change remember we talked about how
their respiratory quotient or RQ went
down it actually was at 0.85 at Baseline
when they started and on day 22 it had
drop down to 0.79 so they'd become
better fat burners so as a result fat
oxidation increased from 64 G per 24
hours at Baseline the first day to 101
gam per 24 hours on day 22 that's a
57% increase in fat oxidation so I'm
going to come back and talk about that
in in a later video not even part of the
series but I'm super excited about it
I've been doing tons of research many of
you have watched the video that I put
out about you know how how much fat your
body can release every day but I do
think that there are ways that we can
upregulate that so I want I want to look
at all the science I can find and really
dive in and say how much fat can we burn
a day how much fat can we burn in a week
so so I'll be sharing examples from
studies like this but yeah this is a so
the change from 64 grams for 24 hours up
to 101 gram that's a 57% increase in fat
oxidation so just to give you an idea of
the difference if you burn 37 more gram
of fat per day that's
1355 more grams of fat per year that's
almost 30 pounds of fat being burned but
just just from this increase in fat
oxidation that we saw so this here right
the these changes this is what a fat
burning machine looks like and that's
our the whole point of of alternate day
fasting is to become a fat burner the
point I'm trying to make here is that
you can completely transform your
metabolism in a few weeks if if if you
can stick with the plan long enough to
see these
results I want to share a bonus tip from
the study that will root be really
helpful as you're getting started look
at the weight loss during the study so
they weigh them every day and you're
seeing weight loss as a percent of their
body weight the scale goes down on
fasting days but then it goes back up on
eating days this actually makes sense
people get real terrified by this but
this because your muscles and your liver
are filling back up with glycogen and
water after you eat you also have the
weight of the food that's passing
through you in your in your GI tract so
you are doing great as long as the
overall trend is going down but it kind
of looks like a saw blade here if this
IM image gives you anxiety of watching
your weight go down and then back up
every other day just weigh yourself at
the end of your fasting windows and Skip
your weighin on your eating days this is
what I do it's better for my mental
health I didn't like seeing the scale go
up even though I understood why it was
happening so I only weigh myself at the
end of my
fasts all right how to ease into fasting
now we understand why you might want to
ease into fasting but let's focus on the
how so again I've worked with hundreds
and hundreds of people and these are the
the tips that that primarily have helped
so here are six steps that can help you
ease into the fasting lifestyle so we'll
go through them all but step one stop
eating after dinner step two skip the
snacks step three slowly shrink your
eating window step four try a modified
alternate day fasting or 52 approach
step five prepare for your first full
36- hour fast and then step six use
crutches if needed so step one stop
eating after dinner no food after dinner
bonus points if you skip to deserved as
well this is the perfect place to start
for several reasons we already fast
overnight while we sleep right hopefully
you're sleeping 7 to 9 hours a night so
you're already fasting every day that's
why they call it breakfast because
you're breaking a fast in the morning so
avoiding food after dinner is the
simplest way to extend the fast that
you're already doing every night another
reason that choosing to extend your
fasting window by avoiding food after
dinner is better than maybe pushing your
breakfast back in the beginning is we
often make very poor food choices at
night right most people don't binge on
Kale while watching TV before bed they
eat a few hundred calories of cereal ice
cream chips cookies those types of
things avoiding food too close to bed
will also help you sleep you don't want
to be digesting a belly full of food or
riding a blood sugar roller coaster
while you prepare for sleep this is a
win-win since sleep is one of our
biggest fat loss superpowers this is why
sleep is one of my favorite topics to
talk
about if you need another reason to skip
the midnight stack snack let's go ahead
and look at this study that showed that
eating late decreases fat burning so
what's the science have to say eating
breakfast and avoiding late evening
snacking sustains lipid oxidation so
this this uh the study showed that
people that eat late at night burn 15
fewer grams of fat per day so it doesn't
sound like a huge number but that's
5,475 G per year that's over 12 lbs of
fat per year so we're looking at just by
eating later no we're not talking about
more calories just by changing when
people eat you can impact how much fat
they're burn for
fuel all right so that's step number one
step two skip the snacks save your
calories for your meals you're trying to
teach your body that it doesn't need to
be fed every 2 to three hours we're
trying to break that cycle this will
also make your meals larger and more
filling and satisfying so skip the
snacks so if you follow these first two
steps you should now be eating two to
three satisfying meals per day with no
snack in and no food after dinner we are
building momentum in the right direction
so Qui quick bonus tip before we move on
to step three eat until you're satisfied
right give yourself some wiggle room
here especially in the beginning you
might feel like you're eating more than
normal and that that's going to be okay
you are not on a diet at this point we
are focusing on getting good at fasting
right so don't limit your food intake
for the first few weeks give your body
time to get fat adapted and then you
will naturally start to consume less as
as your appetite gets regulated so
here's the key make sure you are eating
enough to recover from your last fast
and prepare for your next fast that's
the absolute key that's why it's super
important to be eating enough
undereating will cause more problems
than overeating at this stage fasting is
where the real magic is happening so we
have to allow it to occur all right so
eat until you're satisfied all right so
step number three slowly shrink your
eating window now our goal is to shrink
our eating window until you're fasting
for at least 16 hours per day you can do
this by pushing breakfast back a little
bit by a couple of hours having dinner a
couple of hours earlier or a bit of both
right so a good schedule for a lot of
people here in this place is going to be
eating 2 to three meals from 10 to 6 or
11: to 7: because that keeps you from
eating too close to bed and then you've
pushed back your breakfast which a lot
of people aren't super hungry when they
wake up anyways so pushing back their
breakfast is generally easier to do than
pushing dinner earlier and then also if
you're eating your dinner at 3 or 4:00
that might impact your family
all right so you can track your fasting
progress I personally don't use a
fasting tracker because I don't restrict
my eating windows on eating days right I
practice 3612 fasting so I have days
that I eat and days that I don't but if
tracking motivates you then I 100% think
that you should do it right it can be
especially helpful as you are extending
your fasting Windows here in the
beginning you can focus on fasting a
little longer every few days or maybe
every week here are my two favorite
fasting trackers based on the little bit
that I played around with them then
feedback from people I've worked with so
you have zero the fasting and health
tracker and then you have the life
fasting timer and tracker but I don't
have a lot of experience with these so
please share your thoughts if you do do
you track if you track your fasting
Windows if so what's your favorite way
to do it how do you track your fasting
windows or maybe explain why you
don't all right so we're trying to
slowly shrink our eating window but what
if you're really struggling to do that
what if you're what if you're having a
real hard time getting your eating
window down to an 8 oring window for
example the first thing to do is to make
sure you're properly hydrated with water
and electrolytes right this is the
solution to most of the problems that
people deal with in the beginning of
their fasting Journeys so check out
these videos for more
details another trick is to try a fat
fast fat fasts are where you add fat
calories during your fasting window to
help your body get used to burning fat
for fuel adding a little fat can really
help control hunger while flying under
your metabolisms radar this is because
fat doesn't stimulate insulin and mtor
the same way that carbs and protein
do you can use any fat you want but I
recommend using MCT oil MCTS are medium
chain triglycerides so MCT oil is a
great fuel source for the body you don't
need you don't need bile to absorb it or
and digest it uh and it's it's burned
for fuel better than other fats so
specifically the C8 MCT oil is called
caprylic acid it's the most ketogenic of
all the MCT oils and will boost your
blood Ketone levels this is where the
hunger control comes from so I
personally use or recommend the
bulletproof brain octane since it's 100%
C8 which is the best type of MCT oil in
my opinion so try adding some to your
coffee or your tea to help you make it
to the end of your fasting window so
you're trying to get to 11: it's 9:00
you're you're ravenously hungry try a
little bit adding a little bit of fat
see if it can help you get to your
fasting window right I'm not saying this
you're going to do this forever but but
it's a nice little way to help you reach
the end of your fasting Windows you can
also use an MCT powder if the MCT oil
causes any GI distress so some people
don't don't do well with MCT oils people
typically tolerate MCT powders
better speaking of ketones you can also
go straight to the source and take
exogenous ketones so I've used several
exogenous ketones but my favorite is
keto start from audacious nutrition it
has only 52 calories and causes my
Ketone levels to jump more than when I
use MCT oil this does not need to be a
permanent solution but combining MCT oil
and exogenous ketones will crank up your
body your Ketone levels and help your
body adapt to fasting until you can rely
on your own body fat for fuel
instead all right so step four try a
modified ADF or 52 approach so now that
you're comfortable with a 168 schedule
it's time to try a modified fast a few
days per
week so here this is the original 52
plan you can see that on there's five
days a week you eat and on two days a
week you consume around 500 calories I
would still eat in the 168 window on
your five regular eating days I wouldn't
do that if I was if you were just going
to use the 52 program forever but you
don't want to lose the progress you've
worked so hard for right we're trying to
get better at fasting so we can go to
full 36-hour fasts so keeping this
tighter eating window will help you I
think so you have 5 days a week where
you eat in that 168 eating window then
choose two days per week to have one or
two small meals that total 500 calories
right we're trying to stress our fasting
Machinery to see if and when we're ready
for a full 36-h hour fast so definitely
go and check out this video I covered
that in great detail I'm I'm a huge fan
of 52 fasting so check out the video for
details but this is one example of a
modified fast you can use the other one
so here's the modified alternate day
fasting approach so instead of eating
one day and fasting the next you're
eating one day and then you're consuming
you're doing a modified fast where you
consume five 100 calories in one or two
small meals on your quote unquote
fasting days right so some people end up
seeing such great results that they
stick with modified ADF and don't see
the need to go any further right for
example a member of my Facebook group
has already lost 100 PBS using this plan
that I lay out in this modified ADF
video pretty exciting to
hear all right so now we've what have we
done we've stopped eating after dinner
right we've we've cut out the snacks
then we've shrunk our eating window now
we're doing these these modified fasting
days so now we're ready right so step
five prepare for your first 36-hour fast
so let me read this quote by Lau I I
hope that's right mastering others is
strength mastering yourself is true
power and I feel that's I feel like
there are real mental benefits that come
with being able to complete your first
36- hour fast this is the moment you've
been working for right you've trained
your fasting muscles your body has
become a better fat burning machine so
as the as Ronnie Coleman would say
there's nothing to nothing to it but to
do it
now all right so what's the here's the
best advice I can give you for your
first 36 hour fast have a busy day
planned right we've all been too busy to
eat before let's take advantage of that
for your first fasting day so so keep
yourself busy to keep your mind off of
food so hopefully this is the first of
many powerful and effective fasts for
for you in your future but what if
you're still really struggling if you've
done all five of these steps and you're
still really struggling what do you do
so step six is to use crutches if needed
I never tell people to but but I
certainly allow it right you can skip
this step if your ADF is in cruise
control I don't do any of this anymore
but I did I used a lot of crutches in
the beginning most of you know my story
but I don't see any problem with adding
a few fasting crutches if they help you
stick to your fasts long enough to get
used to them right I've worked with
dozens of people who have told me that
they would have given up on Alternate
day fasting if it weren't for little
things like sugar-free gum a splash of
cream in coffee or some broth when they
were about throw in the towel right I I
I mean I'm I'm that was me in the
beginning right a warm cup of broth a
piece of sugar-free gum they kept me
fasting on days when I felt like giving
up and I still made amazing progress
right that's what we're looking for
we're looking for Progress not
Perfection if you have to choose between
a piece of sugar-free gum and a large
pizza because you you you gave up on
your fast then choose the sugar-free gum
or the bone broth or whatever it
is so clean fasting May matter
absolutely I've been clean fasting for
months and months now if you can do it
it's a smart move but sustainable
fasting matters a lot more right I am
not the fasting police my goal is to
help you work towards the ADF plan that
will work best for you and if it
involves some crutches occasionally to
keep you fasting then I'm all for
it but keep in mind what works well for
one person can be a terrible idea for
someone else right don't add anything to
your fasting window if it increases your
hunger or makes you feel worse if
something helps then use it as long as
you need to skip it if it
doesn't all right so there you have it
this is how to ease into fasting start
slow start smart and take every easy
Victory you can get but give it time
right don't forget who won the race
between the tortoise and the hair you
need to focus on the next 24 months more
than the next 24 hours if you want to
see long-term
results so this is as far as some people
need to go right some people make
amazing progress by only focusing on
when they eat but if fasting is still
difficult for you after this process or
you want to see even better results it's
time to focus on what you are eating as
well that's what's going to be that's
what I'll be covering in the next few
videos so I hope this one helped you
have a wonderful day be
blessed