decaffeinated green tea, an integral component of the PAGG stack cause
some people using home-brewed PAGG stacks have been noting online that they are
experiencing insomnia. Even Tim Ferriss
weighed in last night to note that it’s possible for green tea extract to cause
insomnia in some people. However,
decaffeinated green tea is often touted as a cure for insomnia by many health
researchers. Who is right? Pareto
Nutrition’s mission is to help
people achieve their health and fitness goals with as little effort as
possible; therefore, we see it as our job to
sort through the research and boil it down for our customers so they can get on
with their goals, and get results. Let’s
take a look at the science, shall we?
three most studied components of green tea are caffeine, theanine, and
EGCG. Let’s investigate these one-by-one
and review what the literature has to say about their effects on sleep.
no surprise to anyone that caffeine is a stimulant that can disrupt your
sleep. Most people will have a hard time falling asleep if they take caffeine
in the evening, although some people who are very sensitive have to avoid
coffee or tea completely. Historically,
fat loss supplements have included large amounts of caffeine, usually as a
guarana or green tea extract. It’s a common practice in the industry as it
gives people something to ‘feel’ so they ‘know the supplement is working’. In
fact it would be very easy for an inexperienced chemist to try to put together
a cheap PAGG supplement that contained as much caffeine per dose as a cup of
worse, supplement manufacturers are not required to list the amount of caffeine
in their herbal preparations, so you never know what you’re getting with most
green tea extracts.
Nutriton’s PAGG stack contains green tea extract that is decaffeinated so only
trace amounts remain. We think it’s more
important to focus on the power of the ingredients to promote fat loss than to
get people hooked on mega doses of caffeine. If you can handle caffeine and
want to consume it, we recommend you get it from your diet.
L-theanine is one of the most interesting ingredients of green
tea. In addition to boosting immune
system activity, this amino acid has been sold separately as an aid in
relaxation. Studies have shown that it
increases alpha brain wave activity, which are an indicator of a relaxed mental
state[i]. It has also been
shown to raise dopamine levels[ii] and have positive effects on mood and stress levels[iii]. This is why many people find green tea a nice alternative
to coffee. The energy boost of tea is
milder and it doesn’t create the jittery feeling that you get with a shot of
is not intended to be a relaxation supplement, so we didn’t use a high theanine
extract in our formula. However, because
our extract is so low in caffeine and plant material, there is a measurable
dose of theanine.
EGCG is the most commonly referenced ingredient in green tea
extract, and the one most touted for its fat burning properties. One reason why it’s so strongly associated
with green tea is that when green tea is processed into black tea the EGCG is
lost. The effects of this molecule are
impressive and wide-ranging. It’s been
shown to increase fat oxidation (the breakdown of fat cells)[iv], increase metabolism through thermogenesis[v], reduce the risk of heart disease and stroke[vi], lower cancer risk[vii][viii][ix], reduce the chance of developing kidney stones[x], and enhance general immune function.
is also a growing body of research that showed straight EGCG reducing anxiety
and EEG levels and partially reversing the anxiety inducing effects of
caffeine[xi]. This research is
suggesting that the famously relaxing effect of green tea might not just be
from the L-theanine, but also the EGCG[xii].
is it possible for a decaffeinated green tea extract to cause insomnia? In rare cases, it can. Those
suffering from autoimmune disorders can be particularly susceptible since green
tea and EGCG have such a strong stimulatory effect on immune system
activity. (autoimmune diseases occur when
the body’s immune system attacks itself). For instance, individuals suffering from hypothyroidism caused by
Hashimoto’s disease have been observed to experience anxiety and insomnia from
taking green tea supplements. The immune system boost that is so healthy for
most of us can have negative effects in these rare conditions.
you do suffer unusual levels of anxiety on any supplement we recommend you talk
to a physician as it may indicate an underlying undiscovered condition.
money back guarantee
Nutrition’s decaffeinated PAGG product is designed to stimulate your body’s fat
loss machinery without relying on stimulants in traditional fat-loss
supplements such as caffeine or ephedrine. The science suggests that a properly decaffeinated green tea extract may
actually help reduce anxiety, and aid relaxation, which is a recipe for a good night’s sleep.
If, while taking PAGG, you do notice increased anxiety that interferes with sleep,
we recommend getting checked out by a physician and if everything’s ok,
consider skipping your final dose of AGG. You’ll still get the benefits of alpha-lipoic acid (which are largely
realized by dosing prior to meals), enjoy increased levels of allicin in your
bloodstream from taking garlic throughout the day, and experience the
cholesterol modifying effects of Policosanol overnight when it matters most.
PAGG just isn’t compatible with your biochemistry (we won’t be offended, we’re
all individuals here), you can return the unused portion to us for a 110%
refund. We go beyond the old-fashioned
100% refund so the shipping fees don’t discourage you from being reimbursed.
[i]Gomez-Ramirez M; Higgins, BA; Rycroft, JA; Owen, GN;
Mahoney, J; Shpaner, M; Foxe, JJ. "The Deployment of Intersensory
Selective Attention: A High-density Electrical Mapping Study of the Effects of
Theanine". Clin Neuropharmacol 30 (1): 25–38.
[ii] Yokogoshi H, Kobayashi M, Mochizuki M, Terashima T (1998).
"Effect of theanine, r-glutamylethylamide, on brain monoamines and
striatal dopamine release in conscious rats". Neurochem Res 23 (5):
[iii]Kimura K, Ozeki M, Juneja L, Ohira H. "L-Theanine
reduces psychological and physiological stress responses". Biol Psychol
[iv]Dulloo AG, Duret C, Rohrer D, Girardier L, Mensi N, Fathi M,
Chantre P, Vandermander J. “Efficacy of a green tea extract rich in catechin
polyphenols and caffeine in increasing 24-h energy expenditure and fat
oxidation in humans.” Am J Clin Nutr 1999 Dec;70(6):1040-5.
[v]Dulloo AG, Seydoux J, Girardier L, Chantre P, Vandermander
J. “Green tea and thermogenesis: interactions between catechin-polyphenols,
caffeine and sympathetic activity.” Int J Obes Relat Metab Disord 2000
[vi]Nakagawa K, Ninomiya M, Okubo T, Aoi N, Juneja LR, Kim M,
Yamanaka K, Miyazawa T. “Tea catechin supplementation increases antioxidant
capacity and prevents phospholipid hydroperoxidation in plasma of humans.” J
Agric Food Chem 1999 Oct;47(10):3967-73.
[vii]Das A, Banik NL, Ray SK "Flavonoids activated caspases
for apoptosis in human glioblastoma T98G and U87MG cells but not in human
normal astrocytes". Cancer 2009 Nov; 116(1): NA
[viii] Bettuzzi S, Brausi M, Rizzi F, Peracchia G, Corti A.
"Chemoprevention of Human Prostate Cancer by Oral Administration of green
Tea Catechins in Volunteers with High-Grade Prostate Intraepithelial Neoplasia:
A Preliminary Report from a One-Year Proof-of-Principle Study". American
Association for Cancer Research 66: 1234–1240.
[ix]Qiao Y, Cao J, Xie L, Shi X. "Cell growth inhibition
and gene expression regulation by (-)-epigallocatechin-3-gallate in human
cervical cancer cells". Archives
of Pharmacal Research 32 (9): 1309–15.
[x]Curhan GC, Willett WC, Speizer FE, Stampfer MJ,. “Beverage use and risk for kidney stones in women.” Ann Intern Med
1998 Apr 1; Vol. 128(7), 534-40.
[xi]Vignes M, Maurice T, Lanté F, Nedjar M, Thethi K, Guiramand
J, Récasens M. Anxiolytic properties of green tea polyphenol
(-)-epigallocatechin gallate (EGCG).Brain Res. 2006 Sep 19;1110(1):102-15. Epub
2006 Jul 21.
[xii]Park KS et al, “(-)-Epigallocatechin-3-0-gallate (EGCG)
reverses caffeine-induced anxiogenic-like effects”, Neuroscience Letters