Sea buckthorn is rich in Vitamin C and polyphenols, known for its outstanding antioxidant and metabolism-boosting effects. Milk thistle is a popular ingredient in liver health products due to its ability to clear toxins and support liver and gallbladder function. Recently, a study published in the journal Phytomedicine found that a beverage combining sea buckthorn and milk thistle brought many surprising benefits to rats with high cholesterol.
Sea Buckthorn + Milk Thistle Can Lower Lipids and Protect the Liver
The study first fed rats a high-fat diet (HFD) for two weeks. Then, a sea buckthorn-milk thistle beverage (HS beverage) was given to different groups: a low-dose (L) group (0.075 g/kg), a medium-dose (M) group (0.15 g/kg), and a high-dose (H) group (0.30 g/kg). The other three groups were the hyperlipidemia model (Mod) group, and two positive control drug groups (Sim and XZK). The goal of this study was to evaluate how the HS beverage improves high cholesterol in rats and explore how it works.
The results showed that the Mod group had significantly increased fat tissue (including fat around the kidneys, testes, and intestines). The HS beverage groups, however, saw a reduction in the weight of their fat tissue and a significant decrease in the weight gain caused by the HFD. From a medical perspective, a reduction in body fat and improved blood lipids are closely linked to a healthier liver. The HFD dramatically increased fat accumulation in the rats, while the HS beverage stopped this increase. This suggests that the HS beverage can effectively improve high cholesterol.
The Impact of the HS Beverage on Rats with High Cholesterol
Furthermore, the HS beverage significantly reduced the liver lipid buildup caused by the HFD. It decreased the number and size of fat droplets in the rats' livers and stopped the enlargement of fat cells. Also, a high-fat diet can cause liver damage, leading to higher levels of alanine aminotransferase (ALT) and aspartate aminotransferase (AST). The HS beverage significantly lowered these ALT and AST levels in the rats' blood. This indicates that the HS beverage can improve both fat metabolism and liver damage caused by a high-fat diet.
Positive effects of HS beverage intake on liver and adipose tissues
The study also found that after drinking the HS beverage, the levels of fatty acids (FA), bile acids, triglycerides, cholesterol esters, and other lipids in the rats' livers and blood plasma were significantly improved. Gene analysis showed that the HS beverage greatly changed the expression of genes in the liver related to cholesterol synthesis, fat production, and FA beta-oxidation.
How Does Sea Buckthorn Effectively Protect the Liver?
Sea buckthorn (Hippophae rhamnoides L.) is a deciduous shrub or tree widely found in temperate and cold regions of Eurasia. Modern research shows that sea buckthorn is rich in vitamins (A, C, E), polysaccharides, organic acids, amino acids, carotenoids, flavonoids, and plant sterols.
Sea buckthorn polysaccharides have antioxidant and anti-inflammatory properties. They can stop the rise in blood AST and ALT levels, reduce liver damage, and decrease the production of inflammatory factors like TNF-α and IL-1β. Sea buckthorn can also prevent alcoholic liver disease, likely by regulating fat metabolism and oxidative stress in the liver. It has also been shown to protect against immune-related liver damage by regulating enzyme proteins.
Another study found that carotenoids in sea buckthorn, such as β-carotene and lycopene, can protect the liver by reducing oxidative stress and regulating fat metabolism in liver cells. The liver-improving effects of sea buckthorn were even found to be better than those of curcumin.
Milk Thistle: The "Gold Standard" for Liver Protection
Milk thistle (Silybum marianum (L.) Gaertn) is an annual or biennial plant native to the Mediterranean. It has been used since ancient Greek and Roman times to help with digestion and improve liver and gallbladder health. The main active compounds in milk thistle are silybin, silychristin, and silydianin, collectively known as silymarin.
Milk thistle mainly protects the liver through three key actions:
Antioxidant: Silymarin acts as a powerful antioxidant in liver cells. It stops the free radicals produced by toxic substances like alcohol and carbon tetrachloride. It also protects cell membranes from damage caused by free radicals and increases the amount of natural antioxidants inside cells.
Anti-inflammatory: Silymarin reduces the expression of cyclooxygenase-2 (COX-2), a key player in inflammation. It also stops the NF-κB protein complex, which triggers the genes that cause inflammation. Studies in mice showed that silymarin lowered inflammatory cytokines in the liver and blood while increasing anti-inflammatory cytokines.
Anti-fibrotic: Silymarin helps prevent the formation of scar tissue in the liver. It does this by stopping liver cells from turning into muscle-like cells that create collagen fibers, a key cause of liver damage. It has been shown to reduce a major regulator of liver fibrosis called transforming growth factor (TGF-β).
The Future of Liver Protection with Sea Buckthorn + Milk Thistle
According to Fortune Business Insights, the global sea buckthorn market is projected to grow from $419.08 million in 2025 to $837.26 million by 2032, with a compound annual growth rate (CAGR) of 10.39%. Precedence Research reports that the global milk thistle market is expected to grow from $115.1 million in 2025 to approximately $228.96 million by 2034, with a CAGR of 7.95% from 2025 to 2034.
From a modern health perspective, people face various causes of liver damage: late nights, drinking, high-fat diets, pollution, and medication. A single ingredient often can't cover all the needs for "antioxidant and metabolism-boosting" effects. The combination of sea buckthorn and milk thistle, however, works together to boost antioxidant abilities and address both the metabolic function and cellular repair needs of the liver. This perfect pairing meets the modern demand for comprehensive liver health.
Written by: Shea
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