Red tea during pregnancy: is it safe and what are the restrictions?

In Russian, the term "red tea" most often refers to two different products: rooibos, native to South Africa, which is caffeine-free and has a distinctive red-brown infusion; and what is called "red tea" in Chinese terminology, but "black tea" in European terminology, which contains caffeine. Confusion over terminology leads to errors in recommendations, so when discussing safety, it's important to first clarify which beverage is being discussed.

The chemical composition of rooibos and black tea differs: rooibos contains almost no caffeine and is rich in polyphenols and some minerals; black tea contains caffeine, theophylline, and a range of tea flavonoids. Caffeine and its associated effects on the fetus and pregnancy outcome are usually the key factor in assessing pregnancy risk. [1]

Practical recommendation: If the text does not explicitly state "rooibos," clarify the meaning of "red tea" before giving medical advice. This article provides separate ratings for rooibos and standard black/red tea with caffeine.

The original article was reviewed by the site's editorial team and updated on July 4, 2025; below is a revised, updated text based on international recommendations and research.

Table 1 - What is meant by "red tea"

Title in the article	Often equivalent in Russia	Caffeine
Rooibos	Rooibos, a red South African tea	0 mg (virtually caffeine-free)
Red tea in Chinese tradition	Black tea according to European classification	Contains caffeine (variable)
Red fruit collections	Herbal/fruit drinks	Usually decaffeinated

Caffeine and Pregnancy: Evidence-Based Guidelines

Caffeine readily crosses the placenta; the fetus is unable to effectively metabolize caffeine, so the maternal dose only partially reaches the fetus and can accumulate with high frequency of intake. The most reliable recommendations are based on risk assessments and the art of comparing data from epidemiological studies. [2]

The European Food Safety Authority (EFSA) and many clinical guidelines recommend limiting caffeine intake during pregnancy to 200 mg per day; the American College of Obstetricians and Gynecologists (ACOG) also recommends a 200 mg/day limit as a reasonable guideline. These limits are intended to reduce the risk of low birth weight and other adverse outcomes, particularly at higher doses. [3]

Research reviews show that caffeine consumption above 300-350 mg/day increases the risk of preterm birth and low fetal weight, while moderate doses (≤200 mg/day) have not been found to have a strong or consistent association with preeclampsia or miscarriage. However, the degree of risk depends on the total dose of caffeine from all sources—tea, coffee, beverages, chocolate, and some medications. [4]

Practical significance: During pregnancy, it is essential to account for caffeine from all sources. If "red tea" contains caffeine (black tea), its contribution to the total dose can be significant; if it is rooibos, the contribution is almost zero. [5]

Table 2 - Caffeine content in typical servings

Drink	Serving size	Caffeine, mg (approx.)
Brewed coffee (cup 240 ml)	240 ml	95 - 165
Black tea (240 ml cup)	240 ml	40 - 70
Green tea (cup 240 ml)	240 ml	20 - 45
Rooibos (red South African tea)	240 ml	0
Decaffeinated coffee	240 ml	2 - 15

Rooibos tea benefits and potential benefits for expectant mothers

Rooibos is caffeine-free, contains antioxidant polyphenols, and has been shown in several preclinical studies to have beneficial effects on oxidative status and certain metabolic parameters. This makes rooibos a potentially safe alternative to caffeinated beverages during pregnancy. [6]

Some animal studies and limited clinical data suggest possible benefits of rooibos for bone metabolism after birth and during lactation; however, human randomized controlled trials are few, and clinical conclusions are drawn cautiously.[7]

Additionally, rooibos is often used as a source of warm, caffeine-free beverage that helps promote adequate hydration and replaces sugary or carbonated drinks, which is beneficial for maintaining a healthy weight and metabolic profile during pregnancy.[8]

However, individual herbal supplements, flavoring blends, and infusions containing rooibos require component evaluation—some supplements may contain herbs with insufficient evidence of safety during pregnancy. It is recommended to use pure rooibos without questionable additives. [9]

Table 3 - Potential benefits of rooibos

Property	Evidence base	Practical assessment
Caffeine-free	Reliable	Safe from a caffeine standpoint
Antioxidant activity	Mainly preclinical data	Useful as part of a diet, but clinical evidence is limited
Effect on bone metabolism	Animal studies, limited data in humans	Requires further research
Hypoallergenic	Generally well tolerated	Rare individual reactions are possible

Risks of drinking black/Chinese "red" tea with caffeine

Black tea contains caffeine; regular consumption of large volumes increases the total caffeine intake. In a number of studies, caffeine intakes above 200-300 mg/day have been associated with increased risk of decreased birth weight and other adverse perinatal outcomes. Therefore, when consuming black tea, it is important to consider the contribution of caffeine to the total daily intake. [10]

Tea can also reduce iron absorption when taken with food due to its polyphenols. This is important for pregnant women: iron deficiency anemia is a common problem during pregnancy and is associated with adverse outcomes. Therefore, it is best to limit tea consumption with meals and, if possible, drink it between meals. [11]

Some cases in the literature have linked very high consumption of polyphenol-containing beverages to the risk of premature stenosis or premature closure of the ductus arteriosus in the fetus with excessive consumption; however, these data are rare and more often relate to extreme dietary habits with high levels of specific polyphenols. The general recommendation is to avoid excessive doses and practice moderation. [12]

If the expectant mother exceeds the recommended caffeine limits, she should discuss reducing the dose with her doctor, assessing sources of caffeine, and adjusting her diet. Drastic restrictions and substitutions without consulting a doctor are not recommended, especially if she has underlying medical conditions. [13]

Table 4 - Interaction of tea with food and medications

Phenomenon	Mechanism	Recommendation
Decreased iron absorption	Tannins and polyphenols bind iron	Do not drink tea while eating or taking iron supplements.
Contribution to the total dose of caffeine	Caffeine in tea combines with coffee and sweet drinks	Consider all sources of caffeine when calculating your daily intake.
Interaction with drugs	Theophylline and caffeine may enhance the effects of some stimulants.	Inform your doctor about regular tea consumption when prescribing medications
Additives in herbal mixtures	Unknown components may not be safe.	Avoid untested herbal mixtures during pregnancy

Practical recommendations for pregnant women

If your "red tea" is rooibos, it can be considered a safe alternative to caffeinated drinks, provided there are no specific herbal additives. For most women, rooibos does not contribute to the caffeine load and can replace coffee or strong tea. [14]

If "red tea" means black/Chinese "red" tea with caffeine, limit your intake so that total caffeine from all sources does not exceed the recommended 200 mg/day. This is approximately 2 standard cups of black tea per day, depending on the brew strength. The less, the safer. [15]

It is recommended to drink tea between meals if there is a risk of iron deficiency anemia, and to avoid flavored or medicinal herbal mixtures without confirmed safety during pregnancy. When prescribing iron, calcium, or other nutrient supplements, coordinate the timing of administration to minimize interactions. [16]

If in doubt, discuss the specific drink with your obstetrician/gynecologist. It's especially important to clarify whether the mixture contains herbs that are contraindicated during pregnancy, and what the total caffeine intake from all your drinks and foods is.

Table 5 - Practical recommendations for use

Situation	Recommendation
Pure Rooibos	Can be used as a decaffeinated alternative
Black tea (regular)	Take into account the total caffeine dose; no more than 1-2 cups per day, provided that overall consumption is controlled
Herbal mixtures	Check ingredients; avoid herbs with unclear safety
Iron-containing drugs	Do not drink tea while taking iron supplements.
You drink a lot of coffee/chocolate	Reduce your overall caffeine intake and choose decaffeinated alternatives

When to consult a doctor

Immediate consultation is required if alarming symptoms occur: severe bleeding, severe pain, a sharp decrease in fetal movements, or severe allergic reactions to the drink. In such situations, assessment of the condition of the pregnant woman and fetus should be a priority. [17]

If you have chronic conditions such as hypertension, kidney disease, or cardiovascular disease, you should discuss your fluid intake with your healthcare professional; some conditions may change the recommended fluid intake and amounts. [18]

When planning to replace your usual drinks with herbal mixtures or dietary supplements, consult a specialist about the ingredients; some herbs are contraindicated during pregnancy or lack sufficient safety data. Never use concentrated herbal preparations without a doctor's supervision. [19]

If the goal is to reduce the caffeine load, the total diet is assessed and a gradual replacement is suggested: rooibos, herbal decaffeinated infusions with confirmed safety, decaffeinated coffee, increased consumption of water and unsweetened drinks. [20]

Table 6 - Signals for contacting a specialist

Symptom or situation	What to do
A sharp decrease in fetal movements	Urgently to the perinatal center
Allergic reaction (swelling, rash, difficulty breathing)	Call an ambulance immediately
Concerns about the composition of herbal tea/blend	Show the composition to your obstetrician or therapist
Severe anemia	Coordinate the regimen of taking tea and iron supplements

Brief summary

1. If by "red tea" you mean rooibos, it is a virtually caffeine-free alternative and is generally safe for pregnancy, provided there are no questionable additives.[21]
2. If “red tea” means black tea with caffeine, consider the contribution to total caffeine intake and limit the total dose to 200 mg/day, as recommended by EFSA and ACOG. [22]
3. Tea may reduce iron absorption; if you are at risk of anemia, do not drink it while taking meals or iron supplements. [23]
4. Avoid untested herbal mixtures and concentrates, and if in doubt, consult your obstetrician. [24]