It is not a sleeping pill and not a medicine: it comes as a capsule (200 mg is a common label strength), in tea, or blended into bedtime drinks, and many people pair it with caffeine for calmer daytime focus. It is generally well tolerated, but check with your doctor first if you are pregnant, breastfeeding or on medication. If you would rather take it as part of a bedtime routine, RELAZZ is a 20 ml sleep drink that blends L-theanine with Lactium® milk peptide.
We sell a sleep drink that contains L-theanine, so this guide is written by a seller. We keep the general part general and cautious, and anything we say about our own product comes straight from our Singapore product page.
What is L-theanine?
L-theanine is an amino acid, but not one of the amino acids your body uses to build protein, and not one you need from your diet. Its best-known source is the tea plant: green, black and oolong tea all contain some, along with caffeine. That pairing is one reason a cup of tea often feels gentler than a strong kopi.
As a supplement, L-theanine is made by extraction or fermentation and sold on its own in capsules or tablets, or blended with other ingredients in calm, focus and sleep products.
What does L-theanine do for stress and sleep?
L-theanine is usually described as promoting a “relaxed but alert” state. Researchers have looked at how it affects brain-wave patterns linked with calm wakefulness and how settled people feel when they are under mild pressure. Most studies are small, so see it as a gentle helper, not a switch.
For sleep, the idea is not sedation. L-theanine does not knock you out; people take it in the evening because a calmer mind finds it easier to drift off. It works best alongside the basics: a regular bedtime, a dim room and phones put away.
It is not a treatment for insomnia, anxiety or any other condition. If you have struggled to sleep for weeks, snore heavily, wake up gasping or feel low most days, see your GP rather than relying on any supplement.
L-theanine and caffeine: why people take them together
“L-theanine and caffeine” is one of the most searched pairings, because tea already combines them. Many people take the two together hoping for clearer focus with fewer jitters than coffee alone. Responses vary.
Two cautions. First, caffeine is still caffeine: the theanine does not cancel it, so the usual limits for your heart, stomach and sleep still apply. Second, if your goal is sleep, keep the caffeine out of the evening altogether: green tea at night brings caffeine along with the theanine, so choose a caffeine-free form.
How much L-theanine per day? (Is 200 mg right?)
There is no official daily requirement for L-theanine in Singapore, because it is not an essential nutrient. On the shelf you will mostly see 100 mg and 200 mg capsules, which is why “l theanine 200mg” is such a common search. The safest rule is simple: follow the label of the product you buy, do not exceed it, and do not stack several products that each contain L-theanine.
In blended products the amount may not be listed per ingredient. Our own RELAZZ page, for example, names L-theanine as an ingredient but does not state how many milligrams each sachet contains, so we will not guess a figure. If you need an exact dose, a single-ingredient capsule is the clearer choice.
L-theanine benefits and side effects
The benefits people look for are calm focus during the day, an easier wind-down in the evening and a more settled night. Searches for “L-theanine benefits for men” usually come from the same place: work stress, long hours and a mind that will not switch off. There is no separate men’s effect; the same cautious picture applies to everyone.
L-theanine is generally well tolerated by healthy adults. Some people report mild headaches, an upset stomach or feeling drowsy; if it makes you sleepy, do not drive or operate machinery after taking it. Check with your doctor or pharmacist first if you:
- are pregnant or breastfeeding (safety data is limited);
- take medication, especially for blood pressure, mood or sleep, or stimulants;
- are buying for a child or teenager.
Where RELAZZ fits if you want L-theanine at bedtime
RELAZZ is the AEMIS bedtime drink we sell in Singapore. Our page describes it as “a 20 ml drink you take an hour before bed”. Each sachet contains Lactium® milk protein hydrolysate, fermented rice germ extract, sour date seed extract, hops extract and L-theanine (from corn extract), on a kiwi base. The page describes the L-theanine as an amino acid that helps you unwind before bedtime and fall asleep more easily, and the Lactium® as a milk peptide that supports GABA, your brain’s calming messenger.
It is not a sleeping pill: our page states that SGS tested it for 365 drugs, sedatives included, and found none, and that it is made for every night with no dependence. It contains milk protein, so skip it if you are allergic to milk. One box holds 20 sachets, and our price is S$99 for one box.
