Rooibos tea benefits are driven by one thing above all: an unusually rich and unusual antioxidant profile. Rooibos (Aspalathus linearis), a caffeine-free herbal tea native to South Africa, is one of the only known sources of two rare antioxidants, aspalathin and nothofagin. This article takes the scientific angle: what rooibos antioxidants actually are, and what peer-reviewed research suggests they may do for the body. The factual claims and citations below are kept from the published studies, and health effects are framed as what the evidence may support, not as medical promises.
Why rooibos is an antioxidant powerhouse
Rooibos tea is renowned for its high concentration of antioxidants, including aspalathin, nothofagin, and quercetin. These compounds help neutralise free radicals, reduce oxidative stress, and protect cells against damage. Aspalathin in particular is almost unique to rooibos, which is part of why studies have found rooibos to show notably high antioxidant activity compared with other herbal teas. [1]
It helps to understand what sets these compounds apart. The table below summarises the main antioxidant and mineral compounds in rooibos.
| Compound | Type | Why it matters |
|---|---|---|
| Aspalathin | Rare dihydrochalcone | Almost unique to rooibos, a key driver of its antioxidant activity |
| Nothofagin | Rare dihydrochalcone | Works alongside aspalathin, rarely found in other plants |
| Quercetin and luteolin | Flavonoids | Linked to heart-supporting (cardioprotective) properties |
| Phenolic acids | Polyphenols | Add to the overall antioxidant capacity |
Because it is also naturally caffeine-free, you can enjoy these antioxidants at any hour. If you are curious about the botany behind that, see our explainer on why rooibos is naturally caffeine-free.
What the research says, mechanism by mechanism
Beyond raw antioxidant capacity, several studies have looked at specific systems in the body. Here is what the evidence may support.
Anti-inflammatory effects
Research has shown that rooibos tea possesses anti-inflammatory properties, attributed to its polyphenolic compounds. Consumption has been associated with a reduction in pro-inflammatory markers such as interleukin-6 (IL-6) and tumour necrosis factor-alpha (TNF-alpha). By helping to moderate inflammation, rooibos may contribute to the prevention of chronic inflammatory conditions, including cardiovascular disease and diabetes. [2]
Cardiovascular health
Several studies have explored rooibos and heart-health markers. Rooibos consumption has been associated with a decrease in LDL cholesterol and an increase in HDL cholesterol, supporting a healthier lipid profile. It has also shown blood-pressure-lowering effects, which may help reduce the risk of hypertension. The flavonoids quercetin and luteolin contribute to these cardioprotective properties. [3]
Digestive benefits
Rooibos tea has been found to have anti-spasmodic properties, which can help ease digestive discomfort and cramping, and it may have anti-ulcerative effects that help protect the stomach lining. Its potential prebiotic properties also suggest it may support a healthy gut microbiome. [4]
Skin health and anti-ageing
The antioxidant and anti-inflammatory properties of rooibos extend to the skin. Research indicates that rooibos extracts can protect skin cells against oxidative stress and help prevent collagen degradation, supporting a healthy complexion. Rooibos extracts have also shown potential to reduce the appearance of wrinkles and improve skin elasticity. [5]
Immune-supporting potential
The immune-supporting effects of rooibos are attributed to its polyphenolic compounds, which have antimicrobial and antiviral properties. Studies suggest rooibos extracts may enhance immune cell activity, supporting the body's defences against infection. [6]
How to get the most from rooibos
To preserve these compounds, brew rooibos with freshly boiled water (around 100 C) and steep for 5 to 7 minutes, longer than you would steep green or black tea. Unlike true tea, rooibos will not turn bitter with a long steep, so a generous infusion simply means a fuller flavour and more of the antioxidant compounds in the cup. You can drink it hot or cold, plain or with a splash of milk.
For a lighter, listicle-style tour of the everyday upsides, see 10 amazing health benefits of rooibos tea. When you are ready to brew a cup, explore our range of rooibos tea.
Frequently asked questions
What are the main health benefits of rooibos tea?
Rooibos is rich in antioxidants and may support heart health, healthy inflammation levels, digestion, skin health, and the immune system. Its standout feature is a pair of rare antioxidants, aspalathin and nothofagin, found almost only in rooibos.
What antioxidants does rooibos tea contain?
Rooibos contains aspalathin and nothofagin (two rare dihydrochalcones found almost exclusively in rooibos), the flavonoids quercetin and luteolin, and various phenolic acids. Together they give rooibos a high antioxidant capacity compared with many other herbal teas.
Is rooibos tea good for your heart?
Research has associated rooibos with lower LDL cholesterol, higher HDL cholesterol, and blood-pressure-lowering effects, which may support cardiovascular health. These are early findings and rooibos should complement, not replace, medical advice.
Does rooibos tea contain caffeine?
No. Rooibos is naturally caffeine-free, so you can drink it at any time of day, including the evening, without affecting sleep.
How much rooibos tea should I drink to get the benefits?
There is no official dose, but a few cups a day fits comfortably into most routines. Because it is caffeine-free and low in tannins, rooibos is gentle enough for regular, all-day drinking.
References
- McKay DL, Blumberg JB. A review of the bioactivity of South African herbal teas: rooibos (Aspalathus linearis) and honeybush (Cyclopia intermedia). Phytotherapy Research, 2007.
- Marnewick JL, et al. Effects of rooibos (Aspalathus linearis) on oxidative stress and biochemical parameters in adults at risk for cardiovascular disease. Journal of Ethnopharmacology, 2011.
- Muller CJF, et al. New Insights into the Efficacy of Aspalathin and Other Related Phytochemicals in Type 2 Diabetes: A Review. International Journal of Molecular Sciences, 2021.
- Wilkinson C, et al. Metabolomic profiling of wild rooibos (Aspalathus linearis) ecotypes and their antioxidant-derived phytopharmaceutical potential. Metabolomics, 2024.