What This Combination Provides, and a Thyroid-Related Safety Point
This formula combines 400mg L-theanine (from Camellia sinensis) with 100mg lemon balm (Melissa officinalis) extract. L-theanine is studied for promoting relaxation without drowsiness, working through GABA and other calming neurotransmitter pathways — this is where the “no jitteriness” comparison to caffeine genuinely comes from, since theanine’s mechanism is distinct from caffeine’s stimulant effect rather than simply “avoiding” caffeine’s downsides.
It’s worth adding a genuine safety point about lemon balm specifically, missing from this product’s description: lemon balm has documented antithyroid activity in laboratory research, inhibiting thyroid-stimulating hormone (TSH) binding. It’s generally advised to avoid lemon balm if you have hypothyroidism (underactive thyroid), since it may worsen the condition, and if you take thyroid medication such as levothyroxine, this is worth discussing with your GP given the potential to interfere with its effectiveness.
Both ingredients here have calming properties through different mechanisms, so combined effects on relaxation and alertness are worth being mindful of — lemon balm has its own mild sedative effect, which could add to theanine’s calming action, or to the effect of sedative medication, alcohol, or other calming supplements taken around the same time.
Lemon balm is also generally not recommended for at least two weeks before surgery, given theoretical effects on central nervous system depressant drugs used during anaesthesia, and some sources note a theoretical interaction with SSRIs.
Sourced from green and black tea (theanine) and Melissa officinalis extract (5:1). Vegan, lactose-free, free from common allergens, non-GMO, gluten-free, manufactured to GMP standards. Take one capsule daily with a full glass of water, preferably with a meal. Not suitable for under-18s. Speak to your GP before use if you have hypothyroidism, take thyroid medication, take sedative or SSRI medication, are pregnant, breastfeeding, or have surgery scheduled.
The Research Behind This Product
Sleep & Rest
Valerian, 5-HTP and L-Theanine: Natural Calm and Sleep Explained
Valerian, 5-HTP and L-theanine are all sold as gentler alternatives to melatonin, but they work through different mechanisms and carry different levels of risk. One of them in particular has a genuine, serious interaction that's worth understanding clearly before you buy — not a minor caveat.
Get the Full Guide
