Naringin (Flavanone Glycoside · Lipid Metabolism · Bone Health)

Compound	Naringin
Chemical class	Polyphenol — Flavanone Glycoside (Naringenin-7-O-neohesperidoside)
CAS	10236-47-2
Primary source	Citrus paradisi (grapefruit peel), Citrus grandis (pomelo peel)
Key applications	Lipid metabolism, anti-inflammatory, bone health
Claim strength	Moderate
Typical form	Naringin isolate ≥98%; citrus peel extract

Name origin: From naringenin (its aglycone), which derives from the Latin naringi — an old term for bitter citrus. Naringin is the bitter principle of grapefruit and pomelo, responsible for their characteristic bitterness through activation of TAS2R taste receptors. Traditional use: Grapefruit peel and pomelo preparations have been used in East Asian herbal medicine (particularly in Kampo and TCM) for digestive, anti-inflammatory, and phlegm-resolving applications. Naringin is central to the bitter tonic activity of these preparations. Research trajectory: Naringin has a robust preclinical evidence base and several small human trials covering lipid modulation, bone density support, and anti-inflammatory activity. Herbuno supplies 98% naringin isolate from pomelo. Commercial source: One of the more commercially available citrus flavanone isolates, produced from pomelo or grapefruit peel at industrial scale.

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Evidence for Naringin Applications

Lipid metabolism and cardiovascular: Several human studies using 80–150 mg/day naringin or naringin-rich citrus extract show reductions in LDL-C, total cholesterol, and triglycerides with modest HDL increases. AMPK activation and HMG-CoA reductase inhibition are proposed mechanisms. The evidence base is consistent but derived from small trials. Claim strength: Moderate.

Bone health and osteogenesis: Naringin promotes osteoblast differentiation and inhibits osteoclast activity in cell and animal models, with BMP-2 and Wnt/β-catenin pathway involvement. Animal studies in ovariectomised models show preserved bone mineral density. Small human data are emerging. Claim strength: Moderate.

Anti-inflammatory: Naringin suppresses NF-κB, COX-2, and NLRP3; reduces TNF-α and IL-6 in multiple cell and animal models. Relevant for joint health and metabolic inflammation formulations. Claim strength: Moderate.

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Dosage & Formulator Specification

Human clinical trials: 80–600 mg/day naringin, typically as a single daily dose with a meal. For lipid management, 80–150 mg/day is the studied range. For anti-inflammatory applications in joint health, 200–400 mg/day is more commonly referenced in preclinical-to-human dose extrapolation.

Herbuno supplies naringin 98% from Citrus grandis (pomelo) — a high-purity isolate suitable for standardised formulations. Specify HPLC purity and absence of naringenin (aglycone) contamination if dosing based on the glycoside specifically.

Naringin has moderate aqueous solubility (~0.3 mg/mL at pH 7). It is bitter at concentrations above ~0.005% — relevant for flavoured supplement formats. Consider eriodictyol co-inclusion for taste masking if using naringin in a beverage or chewable format. Stable to heat processing.

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Frequently Asked Questions — Naringin

What is the difference between naringin and naringenin?
Naringin is the glycoside — naringenin with a neohesperidose (rhamnose + glucose) attached at C-7. Naringenin is the aglycone released by intestinal hydrolysis. Naringin is responsible for grapefruit bitterness; naringenin is the primary circulating metabolite. The two have overlapping but distinct pharmacological profiles and bioavailability kinetics.

Does naringin interact with drugs like grapefruit juice does?
Grapefruit juice drug interactions are primarily attributed to furanocoumarins (bergamottin, 6′,7′-dihydroxybergamottin) rather than naringin. Isolated naringin does not carry the same CYP3A4 inhibition risk as grapefruit juice. Formulators should clarify this distinction in product documentation when naringin is included in supplements.

Is naringin from pomelo equivalent to grapefruit-derived naringin?
Chemically identical. Pomelo (Citrus grandis) peel is often the preferred industrial source due to higher naringin content and more consistent supply than grapefruit, particularly from India and China. The biological activity is equivalent.

What is the stability of naringin in finished supplement formats?
Naringin is stable under standard supplement manufacturing conditions (heat, mild acid). It is more acid-stable than some O-glycosides because the neohesperidose linkage is resistant to gastric hydrolysis — requiring microbial or brush-border enzymatic cleavage for conversion to naringenin. Room-temperature stability in dry solid formats exceeds 24 months with appropriate packaging.

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Claim-strength scale – High = multiple human RCTs; Moderate = limited trials or strong preclinical convergence; Emerging = early-stage lab or animal data.

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