D-Limonene

Shaanxi Yuantai Biological Technology Co., Ltd. is one of the most reliable manufacturers and suppliers of d-limonene in China. With abundant experience, we warmly welcome you to wholesale bulk d-limonene for sale here from our factory. Quality products and reasonable price are available.

D-limonene is a cyclic monoterpene compound. It is the primary (and highest) component of citrus peel essential oils from the Rutaceae family, but it is not the dominant component of the citrus aroma. This naturally occurring compound exists in three isomers: naturally occurring L-limonene and D-limonene are both optically active. The D-limonene is primarily found in essential oils like lemon, tangerine, and orange oils, imparting a sweet, refreshing aroma. The L-limonene is more common in oils like peppermint and pine needles, giving them a refreshing scent. Synthetic limonene is a racemic isomeric form and lacks optical activity.

As a core aromatic compound in citrus essential oils, limonene's most notable property is its exceptional cleansing properties. Research has also confirmed its multiple health benefits. Besides citrus, it also occurs naturally in a variety of plants, including black pepper, mint, and dill, imparting their distinctive citrusy aroma. With its unique aromatic properties and functional activity, limonene has become an important raw material for cleaning products and cosmetics, and is widely used as a flavor and fragrance in the food manufacturing industry.

Anti-inflammatory Effects
Limonene exerts its anti-inflammatory effects by regulating the expression of inflammatory factors: it effectively inhibits the overproduction of pro-inflammatory factors such as TNF-α, IL-6, and IL-1β, while simultaneously enhancing the activity of the anti-inflammatory factor IL-10. During wound healing, it promotes collagen synthesis and reduces inflammatory cell infiltration, significantly accelerating skin repair.

Antimicrobial Effects
Limonene exhibits a dual antimicrobial mechanism: on the one hand, it enhances tissue antioxidant defenses by increasing GSH-Px (glutathione peroxidase) activity; on the other hand, it effectively inhibits bacterial efflux pumps, reversing antibiotic resistance in drug-resistant bacteria such as Staphylococcus aureus. When used in combination with antibiotics, it exhibits significant synergistic effects.

Sedative Effects
Limonene produces a sedative effect by regulating neurotransmitter balance: it enhances serotonin expression while inhibiting excessive dopamine release, effectively alleviating methamphetamine-induced neuroexcitation and exhibiting significant sedative properties.

Antioxidant Effects

As an effective antioxidant, limonene not only directly scavenges free radicals but also activates endogenous antioxidant enzyme systems such as GSH-Px, enhancing cellular resistance to oxidative stress and protecting tissues from oxidative damage.

Skin Benefits

1. D-limonene significantly reduces inflammation and promotes wound healing.
2. D-limonene is effective in treating psoriasis and has moisturizing properties.
3. D-limonene inhibits the formation of new blood vessels in endothelial cells.
Researchers surprisingly discovered that while D-limonene promotes wound healing, it also reduces angiogenesis. This finding was further confirmed using an in vitro human umbilical vein endothelial cell model.
4. D-limonene may prevent skin cancer.
Research has shown that D-limonene can reduce tumor burden. Monoterpenes are associated with increasing apoptosis, inhibiting oxidative stress, and inhibiting Ras signaling.

5. D-limonene effectively improves wrinkles.
Twenty-one women aged 53-69 used D-limonene spray for 29 days. Quantirides assessed changes in the number, length, depth, and surface area of crow's feet before and after use. 84% of participants reported a significant improvement in wrinkles (Figures 1 and 2).

Figure 1. Comparison of changes in periocular wrinkles. (Top) Periocular photograph; (Bottom) Quantirides® assessment; (A) Before use; (B) After 29 days of use

Figure 2. Quantirides evaluation results

In recent years, a growing number of scientific studies have demonstrated the long-term efficacy of botanical ingredients. The main metabolite of d-limonene has anti-inflammatory and anti-angiogenic effects, and d-limonene is only one type of orange peel extract. The other ingredients have the effect of enhancers, which can enhance skin permeability and increase dopamine production, increase stress resistance and improve mood.

Daily Chemical Fragrance
D-limonene, with its refreshing citrus aroma, is widely used in the formulation of fragrances for daily chemical products such as soaps, detergents, skincare products, and perfumes, imparting a natural and pleasant aroma.

Food Fragrance
As a natural flavoring ingredient, D-limonene is added to the flavor formulations of various foods and beverages, effectively enhancing and enriching the flavor profile and improving the eating experience.

Medical R&D Value
Limonene demonstrates significant potential in medical research:
Digestive System Disorders: Combination with other medications for the treatment of gallstones
These findings provide scientific support for its further development in the pharmaceutical field.

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