Juicing is an easy way to consume lots of nutrients without
having to eat whole fruits and vegetables. Many people claim
it’s a helpful weight loss tool.
The juicing diet trend has increased in popularity over the
years, but its effectiveness is controversial.
This article will explore whether juicing can really help you
What Is Juicing?
is the process of extracting the liquid from fruits and
vegetables, while removing the solids. This can be done by hand
or with a motor-driven juicer.
The juice from fruits and vegetables doesn’t contain any skin,
seeds or pulp. It does contain some nutrients and antioxidants,
but without the beneficial fiber of whole fruits and
Some people use juicing as a so-called “detox”
method. However, there are no scientific studies showing that
replacing solid food with juice will detoxify the body.
Your body is able to get rid of toxins on its own through the
liver and kidneys, so using juice as a detox treatment is
People also use juices as nutrition supplements and to lose
weight. Neither of these uses is supported by research, but
many people claim they work.
In general, juice recipes contain fruit and vegetables. Many
also contain spices such as turmeric and ginger.
Bottom Line: Juicing involves extracting the
liquid from fruits and vegetables. People drink this juice to
“detox” their bodies, add nutrients to their diets and lose
There are several types of juice diets available. The most
common type is a juice fast, in which people replace their
meals with juiced fruits and vegetables.
The point is to lose weight by abstaining from solid food,
while still ingesting a significant amount of nutrients from
Generally, the diets are very low in calories.
Some people do juice fasts for just a few days, while others go
on them for weeks at a time.
Unfortunately, the effectiveness of juice diets is not well
studied, but many people claim they produce quick weight loss.
Bottom Line: The most common juice diet is a
juice fast, in which people consume juice instead of solid
foods in an effort to lose weight.
Juicing May Significantly Reduce Calorie Intake
Most juice diets lack solid food and consist of about 600–1,000
calories per day. This results in a large calorie deficit for
many people, so juice diets do often lead to weight loss, at
least in the short-term.
The fewer calories you consume on a juice diet, the more
rapidly you’ll lose weight.
However, once your calorie intake goes back to normal after the
juice diet, you’ll likely regain some of the weight, if not
Bottom Line: Juice diets tend to be low in
calories and the resulting calorie deficit may lead to rapid
Juicing Diets and Fullness
Since juice-only diets lack solid foods, you might find
yourself feeling hungrier than usual when following this type
In one study, 20 normal-weight adults and 20 overweight adults
were each given 300 calories worth of apple, apple sauce or
apple juice with a meal or as a snack (6).
Those who drank the apple juice were less full than those who
ate the solid foods. They also ended up hungry again earlier
than the others.
Meanwhile, protein increases the levels of hormones that signal
fullness, which are essential for appetite regulation (9).
The juicing process eliminates fiber from fruits and
vegetables. These sources are also naturally low in protein.
Therefore, juice diets may not fill you up and, for that
reason, they can be difficult to sustain.
Bottom Line: Juice diets may be unsatisfying
because they lack solid foods, fiber and protein, which are
important for inducing feelings of fullness.
Juicing Affects Metabolism
The severe calorie deficit that many juice diets cause can have
a destructive effect on your metabolism.
These diets are characterized by rapid weight loss and limited
protein intake, which may lead to reduced muscle mass (14).
Muscles are metabolically active, so individuals with a lower
muscle mass have a lower resting energy expenditure. This means
they burn fewer calories at rest than those with more muscle
(15, 16, 17).
Additionally, your body senses starvation when you dramatically
reduce your calorie intake, so your body acts to preserve
calories by burning fewer of them.
In one study, overweight and obese women underwent a calorie
restriction treatment for three months. They experienced a
significant reduction in resting energy expenditure over that
The same effect occurred in another study where participants
consumed either 1,114 or 1,462 calories per day.
Participants who underwent the lower-calorie treatment
experienced significant decreases in resting energy expenditure
after only four days (19).
In fact, the group that severely restricted their calorie
intake experienced a 13% drop in resting energy expenditure.
That’s double the drop observed in the group that only
moderately restricted their calorie intake (19).
It is clear that calorie restriction can reduce metabolism
after just a few days.
While a calorie deficit is necessary for weight loss, it
appears that low-calorie diets, including juice fasts, may be
counterproductive due to their negative effects on metabolism.
Bottom Line: Juice diets may negatively
impact your metabolism, especially when they are very low in
calories and you follow them for a long time.
Juicing Can Be Harmful to Your Health
Juicing is generally safe if you do it for only a few days at a
time. However, juice fasts do carry some risks when they are
Whole fruits and vegetables are excellent sources of fiber, but
that fiber is removed in the juicing process.
Fiber is an essential part of a healthy diet. Eating enough of
it is important for optimal digestion because it keeps the
beneficial bacteria in your gut healthy and may reduce
constipation for some people (21).
Additionally, it may lower your risk of heart disease, diabetes
and obesity (21).
By juicing, you significantly reduce your fiber intake, which
may result in health problems.
There are a few reasons why doing juice fasts for long periods
of time may lead to nutrient deficiencies.
Since these diets lack animal products, they are low in a few
essential nutrients, such as calcium, vitamin D,
iron, vitamin B12 and zinc.
All of these nutrients have important functions in the body.
Inadequate consumption may lead to conditions including
osteoporosis and anemia.
Not only are these diets low in specific nutrients, but they
may actually interfere with the absorption of the nutrients.
Oxalate-rich vegetables that are commonly used in juicing
include spinach, beet greens, kale, beets, Swiss chard and
Increased Risk of Infection
Studies show that even a mild depletion of immune-enhancing
nutrients, such as iron and zinc, may impair immune system
When your immune system is compromised, you may catch illnesses
such as colds and the flu more easily. It may also take longer
for your body to heal wounds (32).
Fatigue and Weakness
Fatigue and weakness are common side effects of following a
These symptoms are likely to occur because of the low number of
calories these diets contain. If you’re depriving your body of
calories, you’re essentially depriving it of energy, which can
lead to these undesirable effects.
Reduced Lean Muscle Mass
The minimal amount of protein in most juice fasts may lead to a
reduction in lean muscle mass, which can have a negative impact
Bottom Line: Juicing is generally safe, but
following a juice-only diet for a long time may have a
negative effect on your health and well-being.
Does Juicing Help You Lose Weight?
There is not any formal research to support that juicing helps
with weight loss.
Based on anecdotal evidence, it is clear that juice diets may
lead to rapid weight loss in the short term, especially when
the diet is very low in calories.
However, you could experience some negative health consequences
of such severe calorie restriction, especially if you follow
the diet for more than a few days at a time.
Additionally, it is difficult to sustain such restrictive
diets. Most people do not stick with very-low-calorie diets for
long, and end up gaining back the weight they lost.
Juicing may be an easy way to lose weight quickly, but it
appears that its potential health consequences may outweigh its
You are better off following a more sustainable diet that
foods and enough calories to keep your body functioning