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Higher NatureAmino acids & derivativesVegan

Theanine 100mg, 90 capsules

£22.42 for 90 capsules at Vitamin Planet. That works out at 50p per 200 mg, which ranks it 6th of the 12 L-theanine products we price across 4 UK retailers.

What it really costs, per 200 mg50pOne 200 mg dose is our comparison unit for L-Theanine. It is not a recommendation.

A day50p

A week£3.49

A month£14.95

A year£181.85

At one 200 mg dose a day, this pack lasts 45 days. A month is 30 days, so twelve of them is not quite a year.

How we worked it out

Servings: 90 ÷ 1 per serving = 90
In the pack: 90 × 100 mg = 9 g
£22.42 ÷ 9 g × 200 mg = 49.8p per 200 mg
A week 49.8p × 7 = £3.49 · a month × 30 = £14.95 · a year × 365 = £181.85
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.

Cheaper L-theanine

All 12, ranked →

L-TheanineCheapest per 200 mgHealf · 200 mg a serving · £4.12 a month · a pack lasts 4 months14p£16.49View at Healf

L-TheanineHealf · 250 mg a serving · £5.60 a month · a pack lasts 2 months19p£13.99View at Healf

L-TheanineW-Wellness · 250 mg a serving · £6.20 a month · a pack lasts 2 months21p£15.49View at W-Wellness

L-Theanine 200mg 60 CapsulesHolland & Barrett · 200 mg a serving · £7.00 a month · a pack lasts 2 months23p£13.99View at Holland & Barrett

L-Theanine 200mgHealf · 200 mg a serving · £7.10 a month · a pack lasts 2 months24p£14.19View at Healf

Higher NatureThis productVitamin Planet · 100 mg a serving · £14.95 a month · a pack lasts 45 days50pshown above

Switching to the Healf pack saves £10.82 a month at the same 200 mg dose.

Ranked purely by price per 200 mg. 70 combination products also contain L-Theanine.

On the label

L-Theanine · L-theanine: 100 mg per serving (stated on the label)
Pack: 90 capsules · 90 servings · 1 capsule(s) a serving
Cost per serving: 25p (90 servings in the pack)

More label details

Claimed on the listing: vegan, vegetarian
Sold by: Vitamin Planet
What the listing says: “90 Caps” · “Theanine 100mg”

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Daily dosemgFordays

One 200 mg dose is our comparison unit, not a recommendation.

Price history

No price change since 7 October 2026. Checked on 6 days, most recently 20 October 2026.

Lowest recorded: £22.427 Oct at Vitamin Planet
Highest recorded: £28.9515 Oct at W-Wellness
First recorded: £22.427 Oct
Checked on: 6 dayssince 7 Oct

Vitamin Planet
W-Wellness

Pack price at each check.

15 OctFirst checked at W-Wellness: £28.95
7 OctFirst checked at Vitamin Planet: £22.42

Questions about this product

How much does Higher Nature Theanine 100mg cost per 200 mg?

50p per 200 mg, from £22.42 for 90 capsules at Vitamin Planet, checked on 7 October 2026.

Is it the cheapest L-theanine in the UK?

No, it is 6th of 12. L-Theanine at Healf works out at 14p per 200 mg.

How long does one pack last?

45 days at one 200 mg dose. The pack holds 9 g in total.

About Higher Nature

All 81 Higher Nature products, priced per dose

Keep comparing

All L-TheanineEvery form, cheapest per 200 mg first L-Theanine guideWhat it is, why people take it, how the forms differ Higher NatureAll 81 products from this brand, per dose Amino acids & derivativesEverything else we price in this category L-Theanine price historyEvery L-Theanine product's price per dose and price history Build a basketThe cheapest way to buy several at once How we compareWhere every number on this page comes from