L-Theanine for Calm Without the Brain Fog

L-Theanine is an amino acid, most naturally found in tea, that customers use for a sense of calm focus. Reviewers describe feeling settled without drowsiness, which is why many take it during busy or stressful periods as well as in the evening to wind down. Each capsule provides 400mg, our higher single-dose strength.

The thing customers value most is that it helps them feel calm without feeling sedated or "sluggish", many take it during the day and stay alert and focused. This "calm but clear-headed" quality is its signature in our reviews.

Both are common. Reviewers take it during busy or stressful periods for daytime calm and focus, and in the evening to help wind down. Take it whenever suits your need.

400mg is a higher single-dose serving, giving you meaningful support from just one capsule, which customers reach for when they want stronger support in one go. If you're new to L-Theanine, you can start with half a capsule and adjust to what suits you.

Our capsules provide 400mg per serving as a higher single dose, take one capsule as needed, or as directed on the label. If you're new to L-Theanine, starting with a lower amount and adjusting is a sensible approach. Don't exceed the stated dose.

Several reviewers report noticing an effect within about half an hour.

Yes, a popular "calm focus" combination customers mention is pairing L-Theanine with their coffee.

Many customers do take it as part of their daily routine, generally without issue, as it's naturally derived and non-habit forming in how reviewers describe it. As with any supplement, stick to the stated dose and take a break if you're unsure. If you're pregnant, breastfeeding, or on medication, check with your GP or pharmacist first.

Most reviewers report no issues at the stated dose, but as with any supplement, individual responses vary and some people prefer to start with a lower amount to see how they get on. It's not intended to replace a varied diet or medical treatment. If you have any concerns, or take other medication, check with your GP or pharmacist first.

If you take any prescribed medication, check with your GP or pharmacist first, and never stop prescribed medication without medical advice.

You can track your order using the link in your shipping confirmation email or by visiting your account page. UK standard delivery typically takes 2, 3 working days from dispatch. For international deliveries, please see our Shipping and Returns. If you need any further assistance, our Customer Care team is here to help at ask@justvitamins.co.uk.

UK standard delivery usually takes 2, 3 working days from dispatch (excluding weekends and bank holidays). For Next Day Delivery, please place your order by 1pm Monday, Friday for delivery on the next working day. You'll receive a tracking email as soon as your order has been dispatched, so we recommend checking your tracking information first if your order hasn't yet arrived.

If your order has not yet been dispatched, we'll do our best to help. Please contact our Customer Care team as soon as possible via email or live chat. Once an order has been dispatched, we're unfortunately unable to make changes or cancel it.

Yes. You can pause, skip, reschedule or cancel your subscription by logging into your account. Simply select Account at the top of the website and make any changes up to 3 days before your next scheduled dispatch.

We primarily serve customers in the UK, but we also deliver to selected international destinations. Please see our Shipping and Returns for the countries we currently ship to and applicable delivery charges.

We offer a 90-day hassle-free returns policy on unopened products. Return postage costs are the customer's responsibility unless the item is faulty or sent in error.

Our supplements are made in the UK in GMP-certified facilities to stringent quality standards. We carefully select our ingredients and carry out rigorous quality checks throughout the manufacturing process, so every product meets our high standards.

Every order is covered by our 90-day money-back guarantee. If you are not completely happy for any reason, contact our Customer Care team within 90 days of purchase and we will refund you, no awkward questions. It is our way of making it easy to try something new with confidence.