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TECHNOLOGY FOR PRODUCING CAPSULES FROM GOJI BERRY
EXTRACT, LYCIUM BARBARUM SPECIES
M.Sh.Foziljonova
Insitute of Pharmaceutical Education and Research,
Doctor of pharmaceutical Science professor
S.Sh.Xoshimjonova
Insitute of Pharmaceutical Education and Research,
1 st stage student
https://doi.org/10.5281/zenodo.12770518
Abstract:
Goji berries (Lycium barbarum) have been used for centuries in
traditional Chinese medicine and are gaining popularity as a "superfruit" due to
their high antioxidant content and potential health benefits. This article reviews
technologies for producing capsules containing concentrated extract from L.
barbarum fruit. Methods of goji berry extraction using solvents like water,
ethanol, and supercritical CO2 are discussed. Spray drying, freeze drying, and
vacuum drying of extracts to produce powders suitable for encapsulation are
covered.
Keywords:
Goji berry, Lycium barbarum, extraction, drying, encapsulation,
nutraceutical
INTRODUCTION
The fruit of Lycium barbarum, known as goji berry or wolfberry, is a
traditional Chinese medicinal herb that has been used for over 2000 years to
promote health and longevity [1]. Goji berries contain a variety of
phytochemicals believed to have beneficial effects, including polysaccharides,
carotenoids like zeaxanthin, vitamins, and flavonoids [2]. Modern research
suggests that goji berry may have antioxidant, anti-inflammatory,
neuroprotective, and immunomodulating properties [1][3].
To deliver these active compounds in a convenient form, manufacturers are
increasingly producing goji berry extract capsules as dietary supplements.
Capsules protect ingredients from oxidation and moisture, mask flavors, and
provide uniform dosing [4]. However, making stable, potent goji berry capsules
requires careful raw material sourcing, extraction, drying, and encapsulation.
METHODS AND LITERATURE REVIEW
Goji Berry Extraction Methods.
The first step in producing goji berry
capsules is extracting active compounds from the fruit. Traditional Chinese
medicine uses water decoction, but this method extracts limited lipophilic
compounds and is prone to contamination [5]. Ethanol extraction improves
compound recovery but requires solvent removal [6]. Supercritical fluid
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extraction using CO2 efficiently obtains a broad range of constituents with
minimal processing but has high equipment costs [7][8].
Yao et al. compared the polysaccharide yield of hot water, ethanol, and
ultrasound-assisted extraction [9]. The ethanol method gave the highest yield of
6.03%. Liu et al. used response surface methodology to optimize ultrasonic
ethanol extraction, achieving 7.16% polysaccharide yield. These studies show
solvent choice and extraction technique significantly impact active compound
recovery.
Drying of Goji Berry Extracts.
Liquid goji extracts are usually dried into
powders for encapsulation. Spray drying, where extracts are rapidly dried in a
hot gas stream, is a common method. It produces fine powders but requires high
temperatures that may degrade some compounds. Freeze drying uses
sublimation of ice to remove water, preserving heat-sensitive components but
taking longer and requiring more energy.
Goji Berry Extract Encapsulation.
Dried goji berry extracts are commonly
encapsulated in gelatin or vegetarian cellulose capsules. Hard gelatin capsules
have lower moisture content and better airtightness than softgels but can be
more difficult to swallow. Hydroxypropyl methylcellulose (HPMC) capsules are
popular for vegan supplements but have higher moisture vapor permeability.
Other materials like pullulan and modified starches are also being explored [7].
Capsule filling is usually done by volume rather than weight due to
variation in extract powder density [8]. Automatic capsule fillers can produce
from 1,000 to over 200,000 capsules per hour. Dosage is controlled by the
capsule size and extract concentration. Sufficient fill weight and powder flow are
important to ensure consistent filling.
RESULTS
Based on the reviewed literature, key considerations for each stage of goji
berry capsule production include:
Extraction:
Ethanol provides good yields of polysaccharides and other active
compounds
Ultrasound-assisted extraction improves yield and extraction speed
Supercritical CO2 efficiently extracts a wide range of lipophilic and
hydrophilic compounds
Drying:
Spray drying gives higher yields but may cause more degradation of
heat-sensitive compounds
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Freeze drying better retains color and some nutrients but is more
time and energy intensive
Encapsulation:
Hard gelatin capsules provide an oxygen and moisture barrier but
may be less acceptable to vegetarian/vegan consumers
HPMC capsules are popular for plant-based supplements but have
higher moisture permeability
Automatic capsule filling enables high-volume production; powder
flowability is important for dosage consistency
Quality Control:
Raw material identity and purity should be verified by analytical
methods like HPLC and DNA barcoding
Capsules should be tested for weight variation, disintegration, and
microbial limits per USP standards
Stability studies must be conducted to determine shelf life and
storage conditions
ANALYSIS AND DISCUSSION
The optimal methods for producing goji berry extract capsules depend on
the target compounds, desired dosage form, and production scale. For small
batches, water or ethanol extraction followed by freeze drying may preserve
sensitive phytochemicals. Large commercial production will likely use organic
solvent extraction with spray drying for higher throughput.
Hard gelatin or HPMC capsules will be suitable for most products. Softgels
may be used if a liquid or paste extract is preferred. Capsule size and fill weight
must be chosen to provide the intended dosage per serving.
Careful quality control is essential to produce safe and effective goji berry
capsules. Rigorous testing of raw materials and finished product can prevent
adulteration and ensure consistency. Stability studies are crucial as botanical
extracts can degrade over time, especially with exposure to heat, light, and
oxygen. Packaging in opaque, airtight containers can improve shelf life.
More research is still needed to fully characterize the bioactive compounds
in L. barbarum and their pharmacokinetics when delivered in capsule form.
Clinical trials can provide data to substantiate health claims made on the label.
However, goji is generally recognized as safe, non-toxic, and well-tolerated.
CONCLUSION
Goji berries are a promising functional food with a range of potential health
benefits. By leveraging advances in extraction, drying, and encapsulation
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technology, producers can create stable, standardized L. barbarum fruit extract
capsules to meet the growing consumer demand for natural herbal supplements.
Further research and development can optimize capsule formulation and
support validated health claims. As more clinical evidence emerges for the safety
and efficacy of goji berry supplementation, this traditional Chinese medicine is
poised for success in the global nutraceutical market.
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Gao, Y., Wei, Y., Wang, Y., Gao, F., & Chen, Z. (2017). Lycium Barbarum: A
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