L-Theanine, 120 capsules
£16.49 for 120 capsules at Healf. That works out at 14p per 200 mg, which ranks it 1st of the 12 L-theanine products we price across 4 UK retailers.
At one 200 mg dose a day, this pack lasts 4 months. A month is 30 days, so twelve of them is not quite a year.
How we worked it out
- Servings: 120 ÷ 1 per serving = 120
- In the pack: 120 × 200 mg = 24 g
- £16.49 ÷ 24 g × 200 mg = 13.7p per 200 mg
- A week 13.7p × 7 = 96p · a month × 30 = £4.12 · a year × 365 = £50.16
- Amount per serving: stated on the label.
The standard dose is a comparison unit, not a recommendation. Always confirm the price on the retailer's site. How we compare everything.
How it compares: L-theanine
All 12, ranked →
Ranked purely by price per 200 mg. 70 combination products also contain L-Theanine.
On the label
- L-Theanine · L-theanine
- 200 mg per serving (stated on the label)
- Pack
- 120 capsules · 120 servings · 1 capsule(s) a serving
- Cost per serving
- 14p (120 servings in the pack)
More label details
- Sold by
- Healf
- What the listing says
- “120 caps” · “Servings Per Container: 120” · “Serving Size: 1 Capsule” · “L-Theanine ; 200 mg”
Ingredients
L-Theanine, Gelatin (Capsule), Rice Flour, Anti-Caking Agent (Vegetable Stearate), Anti-Caking Agent (Silicon Dioxide)
From the Healf listing. Check the pack itself if you have an allergy: labels mark allergens in bold.
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One 200 mg dose is our comparison unit, not a recommendation.
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Filled in from the label’s serving: 1 capsule.
What you paid
Optional. At Healf today: £16.49.
“Order by” allows 3 working days’ delivery from Healf and your spare days.
Price history
No price change since 1 October 2026. Checked on 20 days, most recently 20 October 2026.
- Price at every check
- £16.49Healf
- First recorded
- £16.491 Oct
- Checked on
- 20 dayssince 1 Oct
- First checked at Healf: £16.49
Questions about this product
How much does Double Wood Supplements L-Theanine cost per 200 mg?
14p per 200 mg, from £16.49 for 120 capsules at Healf, checked on 20 October 2026.
Is it the cheapest L-theanine in the UK?
Yes. Of the 12 we price across 4 UK retailers, this is the cheapest per 200 mg.
How long does one pack last?
4 months at one 200 mg dose. The pack holds 24 g in total.
About Double Wood Supplements
All 22 Double Wood Supplements products, priced per dose
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