From the Guidelines
Theanine supplements should be held 24 hours before surgery due to their potential to decrease blood pressure in a dose-dependent manner. According to the Society for Perioperative Assessment and Quality Improvement (SPAQI) consensus statement published in the Mayo Clinic Proceedings in 2021 1, theanine is a derivative of glutamate that can cause a dose-dependent decrease in blood pressure. This is a crucial consideration for patients undergoing surgery, as it may impact their perioperative management.
When considering the use of theanine supplements in general, it is essential to weigh the potential benefits against the risks. Theanine has been shown to promote relaxation and reduce anxiety by increasing alpha brain wave activity and affecting levels of neurotransmitters like GABA, serotonin, and dopamine. However, individuals taking medications for high blood pressure, stimulants, or sedatives should consult with a healthcare provider before using theanine due to potential interactions 1.
Key points to consider when taking theanine supplements include:
- Typical doses range from 100-400 mg per day
- No official recommended dosage, but 200 mg per dose is commonly used for anxiety and stress reduction
- Can be taken daily or as needed for situational anxiety
- May be taken with or without food
- For sleep improvement, taking it 30-60 minutes before bedtime is recommended
- Potential interactions with medications for high blood pressure, stimulants, or sedatives
- Pregnant or breastfeeding women should seek medical advice before supplementation
- Rare side effects may include headache, dizziness, or gastrointestinal discomfort in some individuals.
It is crucial to prioritize the patient's safety and well-being, and holding theanine supplements 24 hours before surgery is the most prudent recommendation based on the current evidence 1.
From the Research
Medical Recommendations for Theanine Supplements
Theanine supplements have been studied for their potential benefits in promoting relaxation, reducing stress and anxiety, and improving sleep quality. Here are some key points to consider:
- The recommended dosage of L-theanine varies, but studies suggest that 200-400 mg per day may be effective in reducing anxiety and stress 2, 3.
- L-theanine has been shown to be safe and well-tolerated, with no significant side effects reported in most studies 2, 4.
- The combination of L-theanine and caffeine may have synergistic effects, improving cognitive performance and alertness while reducing jitteriness and anxiety 5, 6.
- L-theanine may be useful in reducing raised blood pressure, as it has been shown to antagonize the effect of caffeine on blood pressure 6.
Potential Benefits and Risks
Some potential benefits of L-theanine supplements include:
- Reduced anxiety and stress 2, 3
- Improved sleep quality 2, 4
- Enhanced cognitive performance and attention 4
- Reduced blood pressure 6 However, more research is needed to fully understand the effects of L-theanine supplements, and some studies have reported inconsistent findings 5. It is also important to note that L-theanine may interact with other medications or have adverse effects in certain individuals, such as those with liver disease or other medical conditions 3.
Dosage and Administration
The optimal dosage and administration of L-theanine supplements are not well established, but most studies have used doses ranging from 200-400 mg per day 2, 3. It is recommended to consult with a healthcare professional before taking L-theanine supplements, especially if you have any underlying medical conditions or are taking other medications 4, 3.