Indole-3-carbinol Powder

Healthkintai^® is a manufacturer and supplier of 3-indole-3-carbinol. I3C is a naturally occurring bioactive phytochemical found in cruciferous vegetables (such as broccoli, cabbage, and kale). Within plant cells, it exists in precursor form and is produced through enzymatic hydrolysis when the vegetables are chopped or chewed. Numerous scientific studies have shown that I3C and its metabolites can regulate multiple key intracellular signaling pathways, including antioxidant, anti-inflammatory, estrogen metabolism regulation, and detoxification enzyme induction. Therefore, it has wide applications in cancer chemoprevention and as a dietary supplement. Contact us at info@kintaibio.com.

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Starting Materials and Reagent Preparation

Indole was used as the starting material. N,N-dimethylformamide (DMF), phosphorus oxychloride (POCl₃), sodium borohydride (NaBH₄), ethanol, dichloromethane, sodium hydroxide, dilute hydrochloric acid, and pure water were prepared. The reaction equipment and vacuum drying oven were ensured to be clean and in working order.

Formylation Synthesis of Indole-3-Carbaldehyde

DMF was added to a dry reaction vessel and stirred while cooling. Phosphorus oxychloride was then slowly added dropwise, followed by continued stirring to form the Vilsmeier reagent. Indole was then dissolved in a small amount of DMF and slowly added dropwise to the reaction solution. After cooling to room temperature, the reaction solution was slowly poured into an ice-water mixture for hydrolysis. The pH was adjusted to 7-8 with 30% sodium hydroxide solution, resulting in the precipitation of a large amount of yellow solid. This solid was filtered, washed with water until neutral, and dried to obtain crude indole-3-carbaldehyde.

Synthesis of Crude 3-Indolemethylethanol

Indole-3-carboxaldehyde was dissolved in methanol or ethanol and stirred until completely dissolved. The solution was placed in an ice bath at 0–5°C, and sodium borohydride was added in batches. After the reaction was complete, dilute hydrochloric acid or saturated ammonium chloride solution was slowly added to quench excess reducing agent and adjust the pH to 7. Most of the alcohol solvent was then removed by vacuum distillation. The residue was extracted 2–3 times with ethyl acetate or dichloromethane. The combined organic phases were dried over anhydrous sodium sulfate, filtered, and then distilled under vacuum to obtain a white to off-white crude 3-indolemethylethanol.

Purification to Obtain Final Product

The crude 3-indolemethylethanol was dissolved in a suitable amount of hot ethanol-water mixed solvent until just dissolved. The solution was filtered while hot to remove insoluble matter. The filtrate was slowly cooled to room temperature and then placed in an ice bath to allow crystals to settle. The crystals were collected by vacuum filtration and washed with a small amount of cold solvent. Finally, the solution was dried under vacuum at 40–50°C to obtain a high-purity 3-indolemethylethanol product with a purity of over 99%.

3-Indolemethyl (I3C) is a naturally occurring precursor compound found in cruciferous vegetables, while 3,3'-diindolylmethane (DIM) is the main metabolite formed by the condensation reaction of I3C in the acidic environment of the stomach. The two differ fundamentally in their chemical structures: I3C is a monomer (containing one hydroxymethyl group), while DIM is a dimer (formed by the condensation of two I3C molecules and does not contain a hydroxymethyl group).

The most significant advantage of DIM is its chemical stability. I3C is rapidly converted in gastric acid, resulting in almost undetectable unchanged I3C in plasma after oral administration; in contrast, DIM remains stable in an acidic environment and can be absorbed into the bloodstream in its intact form. This means that DIM has a much higher oral bioavailability than I3C, making it more suitable for formulation as an oral supplement, and its in vivo effects are more predictable.

Because I3C bulk is unstable in the acidic environment of the stomach and rapidly converts into DIM and other oligomers, it may play a unique role locally in the gastrointestinal tract. For example, in the chemoprevention of gastrointestinal diseases such as colorectal cancer, the high concentrations of active metabolites produced locally in the stomach and intestines by I3C may be more effective than DIM.

3-Indolemethylethanol (I3C) and sulforaphane are both important bioactive phytochemicals found in cruciferous vegetables (such as broccoli, cabbage, and kale), but they originate from different sources: I3C's precursor is glucobrassicin, a type of glucosinolate, while sulforaphane's precursor is glucoraphanin. Both require hydrolysis by myrosinase to produce their active forms.

Despite their completely different chemical structures, they share overlapping yet distinct biological functions: both can activate the Nrf2 signaling pathway, inducing the expression of phase II detoxification enzymes, thereby exerting antioxidant and chemopreventive effects; simultaneously, both can regulate aryl hydrocarbon receptor (AhR) activity. However, sulforaphane is currently recognized as one of the most potent natural Nrf2 activators, while I3C (and its metabolite DIM) is primarily characterized by its regulation of estrogen metabolism.

indole-3-carbinol benefits weight loss

I3C exhibits clear multi-pathway potential in weight loss. Animal experiments have confirmed that it can significantly reduce body weight, fat accumulation, and hepatic steatosis in high-fat diet-induced obese mice, and improve insulin resistance and systemic inflammation. In addition, I3C can reduce lipogenesis by inhibiting FTO protein expression in adipocytes, improve hyperleptinemia by alleviating endoplasmic reticulum stress, and regulate metabolites such as arginine succinate, thus exerting anti-obesity effects from multiple dimensions.

indole 3 carbinol hormone balance

Indole 3 Carbinol powder primarily regulates hormones through estrogen metabolism, which is one of its most closely watched biological activities. I3C promotes the conversion of estrone (E1) and estradiol (E2) to the protective 2-hydroxyestrone metabolic pathway, while inhibiting the production of genotoxic 4-hydroxyestrone and 16α-hydroxyestrone. This estrogen-biased metabolic effect may help reduce the risk of estrogen-related tumors. Furthermore, I3C powder can indirectly affect other hormone metabolic pathways by regulating aryl hydrocarbon receptors (AhRs) and may disrupt the balance of thyroid hormones; however, the latter requires attention when supplementing at high doses.

indole 3 carbinol benefits for men

The effects of I3C on men are primarily focused on two aspects: estrogen metabolism regulation and prostate health. I3C powder helps reduce the potential stimulating effect of estrogen on the prostate, exerting a chemopreventive effect. Furthermore, preliminary studies suggest that I3C may also have a positive impact on male reproductive health (such as improving sperm quality) by regulating aryl hydrocarbon receptors (AhR) and anti-inflammatory pathways. It is important to note that bulk I3C is not an anti-androgen drug and does not lower testosterone levels; rather, it indirectly maintains male endocrine homeostasis by regulating estrogen balance.

indole 3 carbinol bodybuilding

Current research on the effects of 3-indolemethylethanol (I3C) in fat reduction and metabolic regulation indirectly supports improvements in body shaping. I3C can inhibit the expression of FTO protein in adipocytes, reducing fat production. These effects help lower overall body fat percentage, resulting in a more toned physique. However, I3C does not have a targeted effect on localized shaping (such as specific reduction in waist and abdomen or muscle gain); its effects are more manifested in systemic body fat reduction achieved through improved metabolic health. When combined with regular exercise and protein intake, I3C may, to some extent, assist in optimizing body composition.

indole 3 carbinol hair loss

Studies have shown that 3-indolemethylethanol (I3C) may have potential applications in the prevention and treatment of hair loss by regulating hormone levels and improving the scalp environment. The antioxidant and anti-inflammatory properties of I3C help improve the scalp microenvironment, which has potential intervention value for androgenetic alopecia. The effects of I3C on hair loss mainly revolve around anti-oxidation, anti-inflammation, and hormone regulation, showing particular potential for seborrheic alopecia and androgenetic alopecia; however, it should currently be considered an adjunctive intervention rather than a replacement therapy.

indole 3 carbinol In pharmaceutical

In pharmaceutical, 3-indoleethanol (I3C) has been developed into various dosage forms to meet different therapeutic needs and improve bioavailability. The most common dosage forms are oral solid dosage forms, including regular capsules, tablets, and inclusion complexes prepared using cyclodextrin inclusion technology, which can significantly improve the stability of I3C in gastric acid. In addition, topical formulations such as creams and gels are also being explored for the local treatment of skin diseases.

indole 3 carbinol supplement

The application of bulk I3C Powder supplements mainly focuses on two areas: estrogen metabolism support and cell health protection. I3C is typically found in indole 3 carbinol pills,capsule form in health supplements, with single-capsule doses commonly ranging from 150mg to 400mg. Commercially available products are often combined with resveratrol, linolenic acid, or cruciferous vegetable extracts to enhance synergistic effects. It is important to note that it is contraindicated in pregnant and breastfeeding women, and those currently taking this medication should consult a doctor before use.

Based on existing clinical research data, the commonly used supplemental dose range for 3-indole-3-Carbinol in human trials is 50 mg to 400 mg daily. 200 mg daily is considered a more conservative starting effective dose, often used in short- to medium-term intervention studies; while 400 mg daily is used as a higher standard dose for in-depth evaluation of specific physiological indicators. These two doses (200 mg and 400 mg of Indole-3-Carbinol) are the most frequently reported regimens in the literature. It is important to clarify that the U.S. Food and Drug Administration (FDA) has not approved 3-indole-3-Carbinol for use as a drug; therefore, the above doses represent only common ranges in clinical studies and are not official legal treatment standards.

Regarding the safety and side effects of l3C, multiple authoritative studies indicate that this compound is generally well-tolerated at conventional doses. In human clinical studies, daily doses of 200-400 mg for 4 weeks to several months showed no significant toxic effects; only a few users reported mild increases in gastrointestinal motility or relief of constipation. In a 5-year observational study, patients taking approximately 300 mg/day reported no significant side effects. Other common side effects include occasional skin rashes and gastrointestinal discomfort.

Choose our 99% 3-indolemethylethanol powder. We employ mature chemical synthesis processes and ethanol-water recrystallization technology to avoid harmful solvent residues such as benzene or toluene, ensuring our products meet international heavy metal and microbiological standards. Each batch comes with a Certificate of Analysis (COA). We have a stable supply capacity ranging from kilograms to tons, supporting customized requirements for particle size and packaging specifications. We can also provide 10g samples for R&D testing. Furthermore, we offer full technical support, assisting with formulation design and stability studies. Our quality system is ISO9001 certified. Contact us at info@kintaibio.com.

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