Grape seed extract safety
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Grape Seed Extract Safety: Human and Animal Studies
Toxicological Safety in Animal Studies
Multiple studies have evaluated the safety of grape seed extract (GSE) in animal models. In rats, both acute and subchronic oral toxicity tests showed no evidence of toxicity at high doses, with a no-observed-adverse-effect level (NOAEL) of up to 2% in the diet, which is equivalent to about 1410–1501 mg/kg body weight per day. No mutagenic effects were observed in standard genetic toxicity tests, and no significant changes in clinical signs, blood parameters, or organ health were found after 90 days of dietary GSE administration. Some minor changes, such as increased food consumption and slight decreases in serum iron levels, were noted but remained within normal ranges and were not associated with adverse effects 14.
Human Safety and Tolerability
A clinical study in healthy adults found that daily oral intake of GSE up to 2500 mg for four weeks was generally safe and well tolerated. Only minor, reversible decreases in serum iron were observed in a few individuals, but these values stayed within the normal range and returned to baseline after stopping GSE. No participants discontinued the study due to adverse effects, supporting the general safety of GSE in short-term human use. However, the study suggests that larger trials are needed to confirm these findings .
Chemical and In Silico Safety Assessments
Advanced analytical methods have been used to characterize the chemical composition of GSE and assess its safety. These analyses confirm that GSE, when properly sourced and authenticated, does not contain constituents above toxicological concern, supporting its safety for use in foods and supplements .
Food Applications and Toxicity Screening
When GSE is added to foods, such as mayonnaise, it can improve oxidative stability without introducing toxicological risks at low concentrations (up to 0.05%). However, higher concentrations may increase toxicity in certain in vitro assays, suggesting that moderation is important when using GSE as a food additive .
Safety in Non-Human Applications
For use in animal feed, particularly for dogs, the safety of grape seed extract is less clear. There are case reports of acute toxicity and kidney failure in dogs after consuming grapes or grape-derived products. Due to insufficient data and the possibility of rare idiosyncratic reactions, regulatory panels have not been able to confirm the safety of GSE as a feed additive for dogs .
Topical and Antimicrobial Uses
GSE has been shown to be safe in cell models used for dermatological applications at certain concentrations, and it demonstrates antimicrobial activity against foodborne pathogens. These findings support its use in skincare and as a natural antimicrobial in food safety strategies, provided concentrations are kept within safe limits 98.
Conclusion
Overall, grape seed extract is considered safe for human consumption at commonly used doses, with no significant toxicity observed in animal or short-term human studies. It is also safe as a food additive at low concentrations. However, caution is advised for use in animal feed, especially for dogs, due to unresolved safety concerns. Continued research and careful sourcing are important to ensure the safety and efficacy of grape seed extract in various applications 1234+4 MORE.
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Most relevant research papers on this topic
Safety evaluation of proanthocyanidin-rich extract from grape seeds.
Proanthocyanidin-rich extract from grape seeds shows no evidence of toxicity and is safe for use in various foods.
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Safety assessment of 4-week oral intake of proanthocyanidin-rich grape seed extract in healthy subjects.
Oral intake of up to 2500 mg of proanthocyanidin-rich grape seed extract for 4 weeks is generally safe and well tolerated in healthy individuals.
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Multi-Detector Characterization of Grape Seed Extract to Enable in silico Safety Assessment
This study developed a comprehensive analytical approach for selecting grape seed extracts, enabling in silico safety assessment based on constituents above toxicological concern.
A Systematic Quantitative Determination of the Antimicrobial Efficacy of Grape Seed Extract against Foodborne Bacterial Pathogens
Grape seed extract is highly effective in inactivating Listeria monocytogenes, aiding in the design of natural antimicrobial-based strategies for sustainable food safety.
Elevating Skincare Science: Grape Seed Extract Encapsulation for Dermatological Care
Grape seed extract encapsulation in soy lecithin microdispersions with pectin shows potential for anti-inflammatory and antioxidant properties in skincare products.
Grape seed procyanidin extract protects against Pb-induced lung toxicity by activating the AMPK/Nrf2/p62 signaling axis.
Grape seed procyanidin extract protects against lead-induced lung injury by reducing oxidative stress, inflammation, and apoptosis, activating the AMPK/Nrf2/p62 signaling pathway.
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