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REVIEW
A Review of the Application and Pharmacological Properties
of a-Bisabolol and a-Bisabolol-Rich Oils
Guy P. P. Kamatou
•
Alvaro M. Viljoen
Received: 11 July 2009 / Revised: 15 August 2009 / Accepted: 1 October 2009 / Published online: 29 October 2009
Ó AOCS 2009
Abstract a-Bisabolol is a naturally occurring sesquiterpene
alcohol which was first isolated from Matricaria chamomilla
(Asteraceae) in the twentieth century and has since been
identified in other aromatic plants such as Eremanthus ery-
thropappus, Smyrniopsis aucheri and Vanillosmopsis species.
Recently, a-bisabolol was identified as a major constituent of
Salvia runcinata essential oil, a plant indigenous to South
Africa. The use of a-bisabolol or bisabolol-rich oil as an anti-
inflammatory agent is ubiquitous. This compound also
exhibits several other pharmacological properties such as
analgesic, antibiotic and anticancer activities. Mutagenicity
and genotoxicity of bisabolol have also been investigated.
Due to the low toxicity associated with bisabolol the Food and
Drug Administration (FDA) has granted this constituent with
Generally Regarded as Safe (GRAS) status which has pro-
moted its use as an active ingredient in several commercial
products. This review aims to summarise the role of a-bi-
sabolol in pharmacological and/or physiological processes
and to discuss some of the possible mechanisms of action of
this commercially important molecule.
Keywords a-Bisabolol Biological properties
Matricaria chamomilla Toxicity
Introduction
Terpenoids constitute a class of lipophilic secondary
metabolites derived from mevalonate and isopentenyl
pyrophosphate which occur widely in nature [1, 2]. These
phytochemicals are diverse in structure and collectively,
they comprise a major component of the volatile fraction of
various aromatic plants. Monoterpenes and sesquiterpenes
are compounds generally found in the essential oils of
several aromatic plants. Sesquiterpenes (C
15
), are formed
biosynthetically from three five-carbon isoprene units or are
synthesised industrially from monoterpenoid feedstocks [3].
Sesquiterpenes have been identified as the active constitu-
ents present in several medicinal plants used in traditional
medicine, with a wide range of biological properties
including anti-infective, anti-oxidant, anti-inflammatory,
anticancer and anticholinesterase activities. Furthermore,
sesquiterpenes are also associated with important biological
and physiological functions such as pheromone interac-
tions, antifeedants, phyto-alexins, etc. [4].
a-(-)-Bisabolol, is a monocyclic sesquiterpene alcohol
which was first isolated in 1951 by Isaac and collaborators
from the blossoms of chamomile (Matricaria chamomilla;
Asteraceae) and it has since been established that a-(-)-bi-
sabolol may exist in four possible stereoisomers (Fig. 1)[5].
a-(-)-Bisabolol has been widely used as an ingredient
in dermatological and cosmetic formulations such as after-
shave creams, hand- and body-lotions, deodorants, lip-
sticks, sun-care and after-sun products, baby care products
and sport creams [6]. It is a preferred active ingredient for
protection against the recurring stresses of the environment
on the skin. The most important biological activities of
bisabolol are the anti-inflammatory, anti-irritant, antibac-
terial and non-allergenic properties.
Natural Origin of Bisabolol
Generally, when referring to bisabolol, a-(-)-bisabolol is
implied. a-(-)-Bisabolol (also known as levomenol) is
G. P. P. Kamatou A. M. Viljoen (&)
Department of Pharmaceutical Sciences,
Faculty of Science, Tshwane University of Technology,
Private Bag X680, Pretoria 0001, South Africa
e-mail: viljoenam@tut.ac.za
123
J Am Oil Chem Soc (2010) 87:1–7
DOI 10.1007/s11746-009-1483-3
present in various plants and can be obtained by hydrodi-
stillation of German chamomile (Matricaria chamomilla),
sage (Salvia runcinata and certain chemotypes of the closely
related S. stenophylla), Vanillosmopsis sp. (e.g. V. pohlii, V.
arborea)andMyoporum grassifolium. Matricaria chamom-
illa and S. runcinata contain up to 50 and 90% a-(-)-
bisabolol, respectively [7, 8]. Another less explored source of
a-bisabolol is the wood of Candeia (Eremanthus erythro-
pappus) which may contain up to 85% of a-bisabolol [9].
Uses
a-(-)-Bisabolol is used in decorative cosmetics, fine
fragrances, shampoos and other toiletries as well as in
non-cosmetic products such as household cleaners and
detergents and also in pharmaceutical formulations [10, 11].
The main application of a-bisabolol in the pharmaceutical
sector is related to its anti-inflammatory, antispasmodic,
anti-allergic, drug permeation and vermifuge properties
[9, 12].
Chemical and Physical Properties
Bisabolol, also known as alpha,4-dimethyl-alpha-(4-
methyl-3-pentenyl)-3-cyclohexene-1-methanol, is a ses-
quiterpene alcohol with the chemical formula C
15
H
26
O.
Bisabolol has a weak sweet flora aroma. It is a colourless
liquid with a relatively low density (0.93) and a boiling point
of 153 °C at 12 Torr [13]. Bisabolol is a very lipophilic
substance, with a propensity to oxidise. It is almost insoluble
in water, nevertheless, soluble in ethanol. The oxidation
products are mainly bisabolol-oxide A and B [14]. The
enantiomer a-(?)-bisabolol is rare in nature and the syn-
thetic equivalent is generally a mixture of a-(±)-bisabolol.
Biological Properties of Bisabolol and Bisabolol-rich Oil
In many parts of the world, German chamomile (confus-
ingly referred to as ‘‘European ginseng’’) is considered to
have panacea-like properties (universal drug) and it used to
treat a diversity of conditions [15]. The high level of
a-bisabolol present in chamomile oil is credited for
providing the several biological properties ranging from
anti-infective activity to anticancer, anti-inflammatory,
anticholinesterase properties, and also for its ability to
enhance transdermal drug permeation [16–20].
Anti-infective Properties of Bisabolol
Several aromatic plants (chamomile and sage) are used as
traditional remedies to treat various ailments. Many studies
have described the composition of essential oils and
reported the biological activity of the major constituents
[21]. Although the antimicrobial activity of certain com-
pounds such as carvacrol, 1,8-cineole and camphor is well
established [22, 23], the antimicrobial activity of many
sesquiterpenes such as bisabolol has only been reported for
a limited number of pathogens. For instance, a-bisabolol
tested active against Gram-positive bacteria, fungi and
Candida albicans [24]. The antimicrobial activity of 20
essential oil constituents including a-bisabolol was inves-
tigated using the microdilution method. Although, a-bisa-
bolol exhibited poor activity against Staphylococcus
aureus, Bacillus cereus and Escherichia coli, the activity
against C. albicans was promising and comparable to
linalool (MIC values: 36 and 39 mM, respectively) [18].
The antifungal activity of sesquiterpenes including
bisabolol against Botrytis cinerea was examined using the
fungal growth inhibition assay. Bisabolol showed mycelial
growth inhibition from 50 ppm, retaining an inhibition
percentage of 49 and 64% at 100 and 200 ppm, respec-
tively, after 6 days [25]. Salvia runcinata (&60% bisabo-
lol) also exhibited in vitro antibacterial activity against
S. aureus, S. epidermidis, B. cereus and B. subtilis with the
MIC values ranging from 1.6 to 3.1 mg/ml [26
].
The antimicrobial activity of chamomile oil varies in the
literature according to the method used and the test organ-
ism implicated. While promising antimicrobial activity of
the oil was recorded against Aspergillus ochraceus and
S. aureus [27], in other studies, chamomile oil showed no
zone of inhibition against Corynebacterium amycolatum,
S. aureus, E. coli, C. amycolatum and C. albicans [28].
The effect of three oils (anise oil, dwarf-pine oil and
chamomile oil) was investigated in vitro against acyclovir-
sensitive and acyclovir-resistant herpes simplex virus type
1 (HSV-1) using a plaque reduction assay. All three oils
exhibited antiviral activity against the acyclovir-sensitive
H
HO
8
4
OH
H
8
44
8
H
OH
4
8
HO
H
(–)-α-Bisabolol (–)-epi-α-Bisabolol (+)-α-Bisabolol (+)-epi-α-Bisabolol
Fig. 1 Stereoisomers of
a-(-)-bisabolol
2 J Am Oil Chem Soc (2010) 87:1–7
123
HSV strain KOS and acyclovir-resistant clinical HSV
isolates as well as acyclovir-resistant Angelotti with
chamomile oil exhibiting the highest activity against the
clinical acyclovir-resistant HSV-1 strains [29]. Plaque
formation was reduced by 97–99.9% when the viruses were
pre-incubated with acyclovir before attachment to the host
cell [29]. The essential oil of chamomile also demonstrated
dose-dependent virucidal activity against the HSV-2 with
an IC
50
value of 0.003%. The possible mechanism of action
was further investigated and the results showed that the
essential oils affected the virus by interrupting adsorption
of herpes viruses in a different manner compared to the
acyclovir which is effective after attachment inside the
infected cells [29, 30].
Four sesquiterpenes; nerolidol, farnesol, bisabolol and
apritone were investigated for their ability to increase the
susceptibility of S. aureus to some conventional antibiotics
(ciprofloxacin, clindamycin, erythromycin, gentamicin,
tetracycline and vancomycin). The results showed that low
concentrations (0.5–2 mM) of nerolidol, bisabolol or
apritone enhanced the susceptibility of S. aureus to the
antibiotic tested [31]. Furthermore, it was suggested that
the sesquiterpenoid compounds may act by disrupting the
normal barrier function of the bacterial cell membrane,
allowing the permeation into the cell of exogenous solutes
such as antibiotics. This effect was found to be more pro-
nounced for Gram-positive bacteria, probably due to the
lack of additional permeability barriers, particularly the
outer membrane of Gram-negative bacteria. A possible
structural resemblance of sesquiterpenes to membrane
lipids (e.g., linear molecules with internal lipophilic char-
acter and a more polar terminus) may also account for the
effectiveness of sesquiterpenes as enhancers of membrane
permeability. For instance, nerolidol and farnesol (with
longer hydrocarbon tails) were found to be more effective
as skin penetration enhancers than bisabolol [32].
Antiplasmodial Activity
German chamomile oil (with bisabolol as the major com-
pound) is used to treat conditions such as dizziness, neu-
ralgia, muscle cramping, headache, malaria and fever.
Various essential oils containing bisabolol have shown
antiplasmodial activity. For instance, the antiplasmodial
activity of S. runcinata (&60% of a-bisabolol) tested
against the chloroquine-resistant strain FCR-3 using the
3
H-hypoxanthine assay exhibited good activity (IC
50
value:
1.2 lg/mL) [26]. However, when a-bisabolol was evalu-
ated as a single component, poor activity was recorded in
comparison to the positive control quinine (IC
50
value: 307
and 0.29 lM, respectively). This result implies other
compounds (either minor or major) are important in the
biological activity of the oil and suggest that the activity of
the crude oil is not always derived from its major constit-
uent as generally speculated.
Anti-oxidant, Anti-inflammatory Activity
and the Effect of Bisabolol on the Skin
Anti-oxidant and Anti-inflammatory Activity
Increasing evidence has suggested that many degenerative
diseases such as brain dysfunction, cancer, heart disease
and immune system decline could be the result of cellular
damage caused by free radicals and that anti-oxidants may
play an important role in disease prevention [33]. The
commonly used anti-oxidants, butylated hydroxyanisol and
butylated hydroxytoluene are synthetic chemicals and the
possible toxicity of these anti-oxidants has resulted in
their reduced use [34]. In recent years, several natural anti-
oxidants have appeared on the market and are generally
regarded as safe [35]. The anti-oxidant activity has been
determined by investigating the effects of a-bisabolol to
interfere with reactive oxygen species (ROS) on chemilu-
minescence of human neutrophil bursts (C. albicans and
N-formyl-methionyl-leucyl-phenylalanine) and cell-free
systems (SIN-1 and H
2
O
2
/HOCl
-
). The results indicated
that a-bisabolol significantly inhibits the luminol-amplified
chemiluminescence at concentrations ranging from 7.7 to
31 lg/mL for C. albicans and N-formyl-methionyl-leucyl-
phenylalanine, respectively. A similar effect was observed
in the SIN-1 and H
2
O
2
/HOCl
-
systems suggesting bisab-
olol as a means of improving the antioxidant capacity
[36]. Although bisabolol has been claimed to exhibit anti-
oxidant activity on chemical and/or biological tests, an
in vitro study showed that a-bisabolol exhibited poor
antioxidant activity against the DPPH radical (IC
50
value [ 450 lg/mL) [18].
Chamomile essential oil is well known and has been used
for centuries as an anti-inflammatory agent and for allevi-
ating the symptoms associated with eczema, dermatitis
and other pronounced irritation. Volatile constituents of
the essential oil of chamomile, notably chamazulene and
a-bisabolol, exert anti-inflammatory activity partly due
to the inhibition of leukotriene synthesis [15, 37]. The
sesquiterpenes such as a-bisabolol appear to be good
5-lipoxygenase (5-LOX) inhibitors and have been widely
reported to have a skin soothing action which strongly
inhibits 5-LOX in vitro. The IC
50
value of this compound on
5-LOX ranged between 10 and 30 lg/mL [17]. As a-bisa-
bolol exhibited activity against the 5-LOX assay, the
essential oils containing higher levels of this sesquiterpene
alcohol are thus expected to inhibit the enzyme. Studies
have demonstrated that S. runcinata oil is good 5-LOX
inhibitor with the IC
50
value of 22.5 lg/mL. However, the
activity of the oil against the COX-2 enzyme was poor [26].
J Am Oil Chem Soc (2010) 87:1–7 3
123
Effect of Bisabolol on the Skin
Hyperpigmentation is the darkening of an area of skin
generally due to the increase of melanin. Several factors
such as inflammatory skin disorders, allergic contact and
irritant contact dermatitis are the main cause of hyperpig-
mentation. The increase of melanogenic enzyme activity or
number of melanocytes may be associated with epidermal
and dermal hyperpigmentation [38]. It is known that the
cAMP response element (CRE) is involved in the
a-melanocyte-stimulating hormone (a-MSH) production.
A study was conducted in order to determine the depig-
mentation effect of a-bisabolol using two different assays:
a cAMP response element luciferase reporter assay and
melanin assay. The results indicated that a-bisabolol
inhibited the CRE activation induced by a-MSH. Similarly,
the compound reduced the melanin content induced by
a-MSH.
Tyrosinase is an enzyme that catalyses the production of
melanin. Studies have demonstrated that a-MSH induces
tyrosinase gene expression via the activation of MITF
(Microphthalmia-associated transcription factor) gene
expression. An investigation was conducted to determine
the effect of a-bisabolol on the a-MSH-induced expression
of MITF and tyrosinase genes and results indicated that
a-bisabolol inhibited the gene expression of MITF and
tyrosinase implying that a-bisabolol inhibits melanogenesis
by lowering intra cellular cAMP levels [38].
Bisabolol as Permeation Enhancers
The percutaneous route of drug delivery is advantageous
over intravenous and oral administration. Nevertheless, the
architecture of the stratum corneum makes it a formidable
barrier to the topical and transdermal administration of
therapeutic agents [39, 40]. The most common approach to
alleviate stratum corneum permeability is the concomitant
use of penetration enhancers [41]. There are several classes
of penetration enhancers and terpenes obtained by distil-
lation from aromatic plants are very efficient for several
reasons. They are natural substances, non toxic, extensively
used in transdermal delivery as permeation enhancers and
Generally Regarded as Safe (GRAS) [42].
Dapiprazole, a known a-blocking drug, is used in topical
eye therapy for the treatment of chronic simple glaucoma,
for induction of pre-operative miosis and for reversion of
pharmacologically induced mydriasis. Many scientists
have suggested that transdermal administration might
present some advantages over the oral route in subjects
suffering from the conditions described above by lower
doses, provide sustained and constant plasma levels, and
improve the patients’ compliance [43]. The in vitro per-
meation rate of dapiprazole base through hairless mouse
skin was investigated in a series of liquid and semisolid
vehicles, both in the absence and in the presence of dif-
ferent penetration enhancers. It was found that the per-
meability coefficient of dapiprazole was significantly
promoted (up to 73 times) by some terpenes such as
I-limonene, a-bisabolol and terpinolene [43]. Furthermore,
the natural occurring (-)-a-bisabolol was twice as active as
enhancer for dapiprazole penetration than racemic (±)-a-
bisabolol [43]. The variation in the activity of bisabolol
demonstrated the role of functional groups in the pharma-
cological properties of certain compounds.
In Vitro and in Vivo Toxicity of Bisabolol
and Bisabolol-Rich Oil
Several studies have been conducted to determine the
toxicity of a-bisabolol. Twenty essential oil constituents
from various classes (ketones, aldehydes, alcohols, phenols
and terpene hydrocarbons) were tested on human epithelial
cells using the MTT assay. a-Bisabolol and nerolidol were
the most toxic compounds (IC
50
value of 41.8 and 5.5 lM,
respectively) [18]. Salvia runcinata (&60% of the oil) was
also found to be toxic on human epithelial cells (IC
50
value: 2.5 lg/ml). However, this toxicity was not corre-
lated to the level of a-bisabolol since toxic compounds
such as nerolidol and camphor were also identified in the
oil [26]. The effect of a-bisabolol on the gastrotoxicity of
acetylsalicylic acid was examined and it was found that
when a-bisabolol is administered orally (dose 0.8–80 mg/
kg) with acetylsalicylic acid (dose 200 mg/kg), a signifi-
cant protective effect is observed (P \ 0.05) [44]. It is
important to mention that the results of any bioassay
depend on the method and the organisms implicated in the
experiment and extrapolating the results of an in vitro
experiment to animal models is not always correct.
Numerous studies have confirmed the safety of chamomile
essential oil which contains a high level of bisabolol [42].
Mutagenicity, Genotoxic Effects and Anticancer
Activity of a-Bisabolol and Bisabolol-rich Oil
and Possible Mechanism of Action
Cancer is a genetic disease and a possible solution to fight the
disease is to reduce exposure to mutagens, chemicals capa-
ble of inducing genomic mutations and disrupting cellular
functions potentially leading to cancer. The ability of
a-bisabolol to induce or increase the frequency of mutation
in TA100, TA98, TA97a and TA1535 Salmonella
typhimurium strains, using the microsome assay with and
without addition of S9 mixture was evaluated. No increase in
the number of his
?
revertant colonies over the negative
control values was observed with any of the four tested
strains at concentrations ranging from 0 to 5000 lg/plate [6].
4 J Am Oil Chem Soc (2010) 87:1–7
123
The capacity of a-bisabolol in chamomile essential oil to
reduce the frequency of micronucleated polychromatic
erythrocytes (MNPE) induced by daunorubicin in mice was
studied by flow cytometry before the administration of the
compounds and at interval periods of 24 h for 72-h post-
administration. Results showed no capacity of a-bisabolol
to significantly increase the rate of micronuclei. However,
a significant dose-dependent inhibitory effect of the mol-
ecule was noted. After 48-h exposure, the percentage
inhibition with 120 and 1200 mg/kg of a-bisabolol was 52
and 65%, respectively [45]. The study also suggested that
a-bisabolol was the molecule responsible of the biological
activities of the volatile fractions of the plant [45].
An experiment was conducted in order to investigate the
effects of a-bisabolol on human and rat glioma cells. It was
found that a-bisabolol has a strong time- and dose-depen-
dent cytotoxic effect on highly malignant human and rat
glioma cell lines (EC
50
= 2 lM). At a lower concentra-
tions (2.5–3.5 lM), the viability of these cells was reduced
after 24 h by 50% with respect to untreated cells [46].
Glioma cells treated with a high concentration of a-bisab-
olol (10.0 lM) resulted in a 100% cell death. The study
also revealed that the viability of normal rat glial cells
(non-neuronial cells) was not affected by treatment with
a-bisabolol at the same concentrations as above. Sugges-
tions were made that a-bisabolol-induced cytotoxicity in
glioma cells may result from the induction of apoptosis
through the mitochondrial pathway [46]. Recent research
has demonstrated that a-bisabolol exerts a rapid and effi-
cient apoptosis-inducing action selectively towards human
and murine malignant glioblastoma cell lines through
mitochondrial damage. Studies have also established that
a-bisabolol can initiate the apoptosis-inducing action
towards highly malignant human pancreatic carcinoma cell
lines without affecting human fibroblast viability [47].
Effect of Bisabolol on Animal Reproduction
and Development
The effects of a-bisabolol was investigated on pregnant rats
dosed daily via gavage on days 6–15 of gestation, at con-
centrations ranging from 250 to 3000 mg/kg body weight.
There was no toxic effect on pre-natal development at
doses up to 1000 mg/kg body weight. However, at con-
centrations higher than 1000 mg/kg body weight, a sig-
nificant reduction in fetal number and subsequent increase
in resorption rate was observed. In addition, slight sedation,
reduced feed intake and reduction of body weight gain
were observed at high dose [48].
The chemoprotection of fertility by chamomile essential
oil (rich in a-bisabolol) was investigated by administration
of 500 mg/kg of essential oil and 5 mg/kg of daunorubicin
(a free radical inductor) to mice and the sperm concen-
tration, motility, viability and fertilisation capacity were
examined. Sperm viability was over 90%, while no effect
on motility and sperm concentration could be observed.
The fertilisation capacity decreased considerably in the
group of animals treated with daunorubicin, while the
fertilisation capacity in the groups receiving chamomile
essential oil was maintained [48] indicating that the
essential oil exhibited a chemopreventive capacity.
Insecticidal Activity and Insect Repellent Capacity
of Bisabolol
Many studies have been undertaken to find new insecticidal
compounds of plant origin. The insecticidal activity of the
heartwood essential oil (Vanillosmopsis pohlii) (which
contains a-bisabolol in high levels) and the pure sesqui-
terpene a-bisabolol have been investigated. The oil and
a-bisabolol exhibited insecticidal activity against Bemisia
argentifolii, the white fly fruit plague. In the search for
alternative chemical control against Aedes aegypti, the
larvicidal effect based on the percentage mortality after
24 h of ten essential oils was tested against the yellow
fever mosquito Aedes aegypti. Among the oils tested, the
essential oil of Vanillosmopsis arborea (rich in a-bisabolol)
displayed the highest larvicidal activity, with CL
50
of
15.9 mg/mL and CL
90
of 28.5 mg/mL [49].
Other Points Not Discussed
The oil obtained from Matricaria chamomilla was inves-
tigated for attention-deficit hyperactivity disorder (ADHD).
The observational study was carried out on three (14–
16 year old) male psychiatric out patients, diagnosed with
ADHD. Using comparisons of Conners’ parent ratings, an
improvement in ADHD symptoms rated by a clinician,
who did not have any information about the Matricaria
chamomilla medication, was observed [50]. The bisabolol
(applied at 50, 200 and 1000 mg/kg body weight/day)
a NOAEL of 200 mg/kg body weight/day was found in a
28-day study on rats. At 1000 mg/kg body eight/day, body
weight gain was slightly reduced.
Chamomile was found to exhibit antispasmodic activity
with a-bisabolol and flavonoids identified as compounds
responsible for the activity [24]. Furthermore, a-bisabolol
exhibited capacity protection against gastric effects of
aspirin (PH
2
). The antipeptic action and proteolytic
capacity of a-bisabolol was examined and results showed
that bisabolol exhibited antipeptic action in a dose depen-
dent manner. It was also found that the proteolytic activity
of pepsin is reduced by 50% through addition of bisabolol
J Am Oil Chem Soc (2010) 87:1–7 5
123
[51]. Essential oil obtained from chamomile is also known
to display no irritant properties. Studies conducted on hen’s
eggs chorioallantoic membrane revealed no irritating
effects of the oil [29]. In vitro studies found that a-bisab-
olol and a-terpineol exhibited wound-healing properties
with EC
50
of 228 and 240 lg/g mouse, respectively [52].
Concluding Comments
Bisabolol is a naturally occurring constituent accumulated
in the essential oil of various species with a vast range of
uses (cosmetics, fine fragrances, pharmaceutical). This
compound although identified in various aromatic plants
is present in substantial amounts in Matricaria chamom-
illa, Salvia runcinata, Myoporum grassifolium and Er-
emanthus erythropappus essential oils. The in vitro and in
vivo investigation of bisabolol and bisabolol-rich oil has
demonstrated several pharmacological properties ranging
from anti-inflammatory to anticancer activities. Although
the antimicrobial activity of bisabolol is known, it is
imperative that this molecule be tested on a broader range
of pathogens to establish the spectrum of antimicrobial
activity. Bisabolol and bisabolol rich-oil have also dem-
onstrated the capacity to enhance the percutaneous
absorption of certain molecules and may prove to be an
important ingredient in future cosmetic and skin care
products. Taking into account the low toxicity of bisab-
olol, it is important to determine other pharmacological
properties such as the potential use of this compound in
alleviating conditions related to the central nervous sys-
tem. The action of essential components in the cytoplas-
mic membrane and on membrane-bound phospholipids is
not yet fully understood and this could prove to be a
rewarding topic in future investigations. Elucidation of the
various mechanisms of action ascribed to bisabolol may
be useful to provide a firm scientific basis for the inclu-
sion of this bioactive molecule in various consumer
products.
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