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Home › Amino acids & derivatives › L-Theanine

MyvitaminsAmino acids & derivativesVegan

Sleep & Relax Capsules

£18.49 for 30 servings at Myprotein. It carries more than one active ingredient, so it is not ranked against single-ingredient products. Each price below counts one ingredient only.

What it really costs, per 200 mg62pOne 200 mg dose is our comparison unit for L-Theanine. It is not a recommendation.
A day62p
A week£4.31
A month£18.49
A year£224.96

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

How we worked it out

L-Theanine

  • In the pack: 30 × 200 mg = 6 g
  • £18.49 ÷ 6 g × 200 mg = 61.6p per 200 mg
  • A week 61.6p × 7 = £4.31 · a month × 30 = £18.49 · a year × 365 = £224.96
  • Amount per serving: stated on the label.

L-Tryptophan

  • In the pack: 30 × 50 mg = 1.5 g
  • £18.49 ÷ 1.5 g × 500 mg = £6.16 per 500 mg
  • A week £6.16 × 7 = £43.14 · a month × 30 = £184.90 · a year × 365 = £2249.62
  • Amount per serving: stated on the label.

Lemon balm

  • In the pack: 30 × 100 mg = 3 g
  • £18.49 ÷ 3 g × 500 mg = £3.08 per 500 mg
  • A week £3.08 × 7 = £21.57 · a month × 30 = £92.45 · a year × 365 = £1124.81
  • Amount per serving: extract weight stated on the label.

Magnesium

  • In the pack: 30 × 200 mg = 6 g
  • £18.49 ÷ 6 g × 100 mg = 30.8p per 100 mg magnesium
  • A week 30.8p × 7 = £2.16 · a month × 30 = £9.24 · a year × 365 = £112.48
  • Amount per serving: stated on the label.

Tart cherry

  • In the pack: 30 × 200 mg = 6 g
  • £18.49 ÷ 6 g × 480 mg = £1.48 per 480 mg
  • A week £1.48 × 7 = £10.35 · a month × 30 = £44.38 · a year × 365 = £539.91
  • Amount per serving: extract weight stated on the label.

Vitamin B6

  • In the pack: 30 × 1.4 mg = 42 mg
  • £18.49 ÷ 42 mg × 50 mg = £22.01 per 50 mg
  • A week £22.01 × 7 = £154.08 · a month × 30 = £660.36 · a year × 365 = £8034.35
  • Amount per serving: stated on the label.

Zinc

  • In the pack: 30 × 10 mg = 300 mg
  • £18.49 ÷ 300 mg × 15 mg = 92.4p per 15 mg zinc
  • A week 92.4p × 7 = £6.47 · a month × 30 = £27.73 · a year × 365 = £337.44
  • 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 →
L-TheanineCheapest per 200 mgHealf · 200 mg a serving · £4.12 a month · a pack lasts 4 months14p£16.49View at Healf (opens in a new tab)
L-TheanineHealf · 250 mg a serving · £5.60 a month · a pack lasts 2 months19p£13.99View at Healf (opens in a new tab)
L-TheanineW-Wellness · 250 mg a serving · £6.20 a month · a pack lasts 2 months21p£15.49View at W-Wellness (opens in a new tab)
This productMyprotein · 200 mg a serving · £18.49 a month · a pack lasts 30 days62pshown above

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

How it compares: L-Tryptophan

Compare every product in this form →
TryptophanCheapest per 500 mgBulk · 220 mg a serving · 75p a month · a pack lasts 7 months2p£4.99View at Bulk (opens in a new tab)
L-Tryptophan 500mgHealf · 1 g a serving · £6.50 a month · a pack lasts 2 months22p£12.99View at Healf (opens in a new tab)
This productMyprotein · 50 mg a serving · £184.90 a month · a pack lasts 3 days£6.16shown above

Ranked purely by price per 500 mg. 29 combination products also contain L-Tryptophan.

How it compares: lemon balm

Compare every product in this form →
VimergyLemon BalmCheapest per 500 mgHealf · 175 mg a serving · £31.68 a month · a pack lasts 40 days£1.06£42.50View at Healf (opens in a new tab)
VimergyLemon BalmHealf · 175 mg a serving · £31.96 a month · a pack lasts 3 months£1.07£89.49View at Healf (opens in a new tab)
VimergyLemon BalmHealf · 175 mg a serving · £52.86 a month · a pack lasts 11 days£1.76£18.50View at Healf (opens in a new tab)
This productMyprotein · 100 mg a serving · £92.45 a month · a pack lasts 6 days£3.08shown above

Ranked purely by price per 500 mg. 24 combination products also contain lemon balm.

How it compares: magnesium bisglycinate

All 66, ranked →
Magnesium Bisglycinate 1500mgCheapest per 100 mg magnesiumSimply Supplements · 1.5 g a serving · 43p a month · a pack lasts 2.5 years1p£12.99View at Simply Supplements (opens in a new tab)
One NutritionPure Magnesium BisglycinateVitamin Planet · 700 mg a serving · 96p a month · a pack lasts 1.7 years3p£20.24View at Vitamin Planet (opens in a new tab)
ZipVitMagnesium Glycinate 2000mgZipVit · 400 mg a serving · £1.00 a month · a pack lasts 2 years3p£23.99View at ZipVit (opens in a new tab)
This productMyprotein · 200 mg a serving · £9.24 a month · a pack lasts 2 months31pshown above

Ranked purely by price per 100 mg magnesium. Labels here do not all state the same thing: this one gives stated on the label, the cheapest gives estimated from the compound weight using our conversion factor. Check both before choosing. 86 combination products also contain magnesium.

How it compares: tart cherry

Compare every product in this form →
Tart Cherry 450mg CapsulesCheapest per 480 mgSimply Supplements · 450 mg a serving · £4.72 a month · a pack lasts 4 months16p£17.69View at Simply Supplements (opens in a new tab)
WeightWorldMontmorency Cherry CapsulesWeightWorld · 120 mg a serving · £15.97 a month · a pack lasts 23 days53p£11.98View at WeightWorld (opens in a new tab)
This productMyprotein · 200 mg a serving · £44.38 a month · a pack lasts 13 days£1.48shown above

Ranked purely by price per 480 mg. 14 combination products also contain tart cherry.

How it compares: vitamin B6 pyridoxine HCl

All 6, ranked →
ZipVitVitamin B6 50mgCheapest per 50 mgZipVit · 50 mg a serving · £1.00 a month · a pack lasts 12 months3p£11.99View at ZipVit (opens in a new tab)
Vitamin B6 Tablets 50mgSimply Supplements · 50 mg a serving · £1.11 a month · a pack lasts 12 months4p£13.29View at Simply Supplements (opens in a new tab)
Vitamin B6 100mgHealf · 100 mg a serving · £1.39 a month · a pack lasts 7 months5p£9.25View at Healf (opens in a new tab)
This productMyprotein · 1.4 mg a serving · £660.36 a month · a pack lasts under a day£22.01shown above

Ranked purely by price per 50 mg. 280 combination products also contain vitamin B6.

How it compares: zinc citrate

All 17, ranked →
Zinc 15mg 180 Tablets (6 month supply)Cheapest per 15 mg zincBoots · 15 mg a serving · £1.29 a month · a pack lasts 6 months4p£7.75View at Boots (opens in a new tab)
Zinc 15mgLamberts Healthcare (Nature's Best) · 15 mg a serving · £1.33 a month · a pack lasts 6 months4p£7.95View at Lamberts Healthcare (opens in a new tab)
Zinc Tablets 15mgSimply Supplements · 15 mg a serving · £1.33 a month · a pack lasts 6 months4p£7.99View at Simply Supplements (opens in a new tab)
This productMyprotein · 10 mg a serving · £27.73 a month · a pack lasts 20 days92pshown above

Ranked purely by price per 15 mg zinc. 201 combination products also contain zinc.

On the label

L-Theanine · L-theanine
200 mg per serving (stated on the label)
L-Tryptophan · L-Tryptophan
50 mg per serving (stated on the label)
Pack
30 servings · 3 null(s) a serving
Cost per serving
62p (30 servings in the pack)
More label details
Lemon balm · Lemon balm
100 mg per serving (extract weight stated on the label)
Magnesium · Bisglycinate (glycinate)
200 mg per serving (stated on the label)
Tart cherry · Tart cherry (capsules & powder)
200 mg per serving (extract weight stated on the label)
Vitamin B6 · Pyridoxine HCl
1.4 mg per serving (stated on the label)
Zinc · Citrate
10 mg per serving (stated on the label)
Claimed on the listing
vegan, vegetarian
Barcode
5059883471747
Sold by
Myprotein
What the listing says
“30servings” · “Take 3 capsules as a daily serving” · “L-Theanine ; 200.0mg”
Ingredients

Magnesium Bisglycinate, Capsule Shell (Glazing Agent (Hydroxypropyl Methyl Cellulose), Water), Montmorency Cherry Powder, L-Theanine, Lemon Balm (Melissa officinalis) L. 4:1 Extract, Anti-Caking Agents (Magnesium Stearate, Silicon Dioxide), L-Tryptophan, Zinc Citrate, Vitamin B6.

From the Myprotein 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.

Price history

1 price change since 3 October 2026. Checked on 18 days, most recently 20 October 2026.

Lowest recorded
£14.993 Oct
Highest recorded
£18.4913 Oct
First recorded
£14.993 Oct
Checked on
18 dayssince 3 Oct
Pack price at each check.
  1. Up at Myprotein: £14.99 → £18.49 (+23%)
  2. First checked at Myprotein: £14.99

Questions about this product

How much does Myvitamins Sleep & Relax Capsules cost per 200 mg?

62p per 200 mg, from £18.49 for 30 servings at Myprotein, checked on 20 October 2026.

How long does one pack last?

30 days at one 200 mg dose. The pack holds 6 g in total.

How much does Myvitamins Sleep & Relax Capsules cost per 500 mg?

£6.16 per 500 mg, from £18.49 for 30 servings at Myprotein, checked on 20 October 2026.

How long does one pack last?

3 days at one 500 mg dose. The pack holds 1.5 g in total.

How much does Myvitamins Sleep & Relax Capsules cost per 500 mg?

£3.08 per 500 mg, from £18.49 for 30 servings at Myprotein, checked on 20 October 2026.

How long does one pack last?

6 days at one 500 mg dose. The pack holds 3 g in total.

How much does Myvitamins Sleep & Relax Capsules cost per 100 mg magnesium?

31p per 100 mg magnesium, from £18.49 for 30 servings at Myprotein, checked on 20 October 2026.

How long does one pack last?

2 months at one 100 mg dose. The pack holds 6 g in total.

How much does Myvitamins Sleep & Relax Capsules cost per 480 mg?

£1.48 per 480 mg, from £18.49 for 30 servings at Myprotein, checked on 20 October 2026.

How long does one pack last?

13 days at one 480 mg dose. The pack holds 6 g in total.

How much does Myvitamins Sleep & Relax Capsules cost per 50 mg?

£22.01 per 50 mg, from £18.49 for 30 servings at Myprotein, checked on 20 October 2026.

How long does one pack last?

under a day at one 50 mg dose. The pack holds 42 mg in total.

How much does Myvitamins Sleep & Relax Capsules cost per 15 mg zinc?

92p per 15 mg zinc, from £18.49 for 30 servings at Myprotein, checked on 20 October 2026.

How long does one pack last?

20 days at one 15 mg dose. The pack holds 300 mg in total.

About Myvitamins

Founded 2012 · Manchester, England · Part of THG plc

Myvitamins is a vitamins and supplements brand launched in August 2012 by The Hut Group, now THG plc, as a sister brand to Myprotein. It is run by THG Nutrition, part of Manchester-based THG.

All 118 Myvitamins products, priced per doseVisit Myvitamins (opens in a new tab)

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