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Optimum NutritionGeneral health ingredients

Opti-Men Multivitamin Tablets, 90 tablets

£21.00 for 90 tablets at Optimum Nutrition. That works out at 70p per serving, which ranks it 182nd of the 283 multivitamins we price across 17 UK retailers.

What it really costs, per serving70pOne serving is our comparison unit for multivitamin. It is not a recommendation.
A day70p
A week£4.90
A month£21.00
A year£255.50

At one serving 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

Multivitamin

  • Servings: 90 ÷ 3 per serving = 30
  • In the pack: 30 × 1 serving = 30 servings
  • £21.00 ÷ 30 servings × 1 serving = 70p per serving
  • A week 70p × 7 = £4.90 · a month × 30 = £21.00 · a year × 365 = £255.50
  • Amount per serving: priced per serving — compare what each serving contains before choosing.

Niacin (vitamin B3)

  • Servings: 90 ÷ 3 per serving = 30
  • In the pack: 30 × 54 mg = 1.62 g
  • £21.00 ÷ 1.62 g × 500 mg = £6.48 per 500 mg
  • A week £6.48 × 7 = £45.37 · a month × 30 = £194.44 · a year × 365 = £2365.74
  • Amount per serving: stated on the label.

Riboflavin (vitamin B2)

  • Servings: 90 ÷ 3 per serving = 30
  • In the pack: 30 × 4.5 mg = 135 mg
  • £21.00 ÷ 135 mg × 100 mg = £15.56 per 100 mg
  • A week £15.56 × 7 = £108.89 · a month × 30 = £466.67 · a year × 365 = £5677.78
  • Amount per serving: stated on the label.

Thiamine (vitamin B1)

  • Servings: 90 ÷ 3 per serving = 30
  • In the pack: 30 × 4 mg = 120 mg
  • £21.00 ÷ 120 mg × 100 mg = £17.50 per 100 mg
  • A week £17.50 × 7 = £122.50 · a month × 30 = £525.00 · a year × 365 = £6387.50
  • Amount per serving: stated on the label.

Vitamin C

  • Servings: 90 ÷ 3 per serving = 30
  • In the pack: 30 × 225 mg = 6.75 g
  • £21.00 ÷ 6.75 g × 1 g = £3.11 per 1 g
  • A week £3.11 × 7 = £21.78 · a month × 30 = £93.33 · a year × 365 = £1135.56
  • 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 multivitamins

All 283, ranked →
Children's Multivitamin DropsHealf · 1 serving a serving · £20.49 a month · a pack lasts 30 days68p£20.49View at Healf (opens in a new tab)
Women's Multivitamin 50Healf · 1 serving a serving · £20.69 a month · a pack lasts 30 days69p£20.69View at Healf (opens in a new tab)
Source of Life® GOLD Multivitamin CapsulesHealf · 1 serving a serving · £20.70 a month · a pack lasts 30 days69p£20.70View at Healf (opens in a new tab)
Men's MultivitaminHealf · 1 serving a serving · £20.92 a month · a pack lasts 30 days70p£20.92View at Healf (opens in a new tab)
Kids Multivitamin ChewableHealf · 1 serving a serving · £20.99 a month · a pack lasts 30 days70p£20.99View at Healf (opens in a new tab)
This productOptimum Nutrition · 1 serving a serving · £21.00 a month · a pack lasts 30 days70pshown above

Switching to the Healf pack saves 51p a month at one serving a day.

Ranked purely by price per serving. 27 combination products also contain multivitamin.

How it compares: niacin (vitamin B3)

Compare every product in this form →
HealthAidVitamin B3 250mg 90 TabletsCheapest per 500 mgLloyds Pharmacy · 250 mg a serving · £7.35 a month · a pack lasts 45 days25p£11.03View at Lloyds Pharmacy (opens in a new tab)
This productOptimum Nutrition · 54 mg a serving · £194.44 a month · a pack lasts 3 days£6.48shown above

Ranked purely by price per 500 mg. 116 combination products also contain niacin (vitamin B3).

How it compares: riboflavin (vitamin B2)

Compare every product in this form →
RiboflavinCheapest per 100 mgHealf · 400 mg a serving · £2.31 a month · a pack lasts 8 months8p£18.49View at Healf (opens in a new tab)
Vitamin B2 100mgHealf · 100 mg a serving · £2.76 a month · a pack lasts 3 months9p£9.21View at Healf (opens in a new tab)
Vitamin B2 (Riboflavin) 50mgLamberts Healthcare (Nature's Best) · 50 mg a serving · £3.90 a month · a pack lasts 50 days13p£6.50View at Lamberts Healthcare (opens in a new tab)
This productOptimum Nutrition · 4.5 mg a serving · £466.67 a month · a pack lasts 1 day£15.56shown above

Ranked purely by price per 100 mg. 192 combination products also contain riboflavin (vitamin B2).

How it compares: thiamine (vitamin B1)

Compare every product in this form →
Vitamin B1 (Thiamin) 100mgCheapest per 100 mgLamberts Healthcare (Nature's Best) · 100 mg a serving · £2.50 a month · a pack lasts 3 months8p£7.50View at Lamberts Healthcare (opens in a new tab)
Natures AidVitamin B1 100mg 90 TabletsLloyds Pharmacy · 100 mg a serving · £3.83 a month · a pack lasts 3 months13p£11.49View at Lloyds Pharmacy (opens in a new tab)
This productOptimum Nutrition · 4 mg a serving · £525.00 a month · a pack lasts 1 day£17.50shown above

Ranked purely by price per 100 mg. 208 combination products also contain thiamine (vitamin B1).

How it compares: vitamin C

All 113, ranked →
Vitamin C Plus TabletsCheapest per 1 gMyprotein · 1 g a serving · £1.00 a month · a pack lasts 6 months3p£5.99View at Myprotein (opens in a new tab)
Vitamin C Crystals PowderHealf · 1.1 g a serving · £1.01 a month · a pack lasts 7 months3p£7.61View at Healf (opens in a new tab)
Vitamin C PowderLamberts Healthcare (Nature's Best) · 1 g a serving · £1.50 a month · a pack lasts 8 months5p£12.50View at Lamberts Healthcare (opens in a new tab)
This productOptimum Nutrition · 225 mg a serving · £93.33 a month · a pack lasts 7 days£3.11shown above

Ranked purely by price per 1 g. 950 combination products also contain vitamin C.

Pack sizes

PackPricePer doseA year
180 tablets£26.0043p£158.17
90 tabletsthis pack£21.0070p£255.50

At one serving a day, the 180 tablets pack costs £97.33 less a year than this one.

On the label

Multivitamin · Multivitamins (per serving)
1 serving per serving (priced per serving — compare what each serving contains before choosing)
Niacin (vitamin B3) · Niacin (nicotinic acid)
54 mg per serving (stated on the label)
Pack
90 tablets · 30 servings · 3 tablet(s) a serving
Cost per serving
70p (30 servings in the pack)
More label details
Riboflavin (vitamin B2) · Riboflavin
4.5 mg per serving (stated on the label)
Thiamine (vitamin B1) · Thiamine
4 mg per serving (stated on the label)
Vitamin C · Standard (ascorbic acid and ascorbates)
225 mg per serving (stated on the label)
Sold by
Optimum Nutrition
What the listing says
“90 tablets” · “Consume 3 tablets”
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One serving is our comparison unit, not a recommendation.

Price history

No price change since 23 September 2026. Checked on 2 days, most recently 9 October 2026.

Price at every check
£21.00Optimum Nutrition
First recorded
£21.0023 Sept
Checked on
2 dayssince 23 Sept
Pack price at each check.
  1. First checked at Optimum Nutrition: £21.00

Questions about this product

How much does Optimum Nutrition Opti-Men Multivitamin Tablets cost per serving?

70p per serving, from £21.00 for 90 tablets at Optimum Nutrition, checked on 9 October 2026.

Is it the cheapest of the multivitamins in the UK?

No, it is 182nd of 283. everyday Multivitamins 240 Tablets at Boots works out at 2p per serving.

How long does one pack last?

30 days at one serving. The pack holds 30 servings in total.

How much does Optimum Nutrition Opti-Men Multivitamin Tablets cost per 500 mg?

£6.48 per 500 mg, from £21.00 for 90 tablets at Optimum Nutrition, checked on 9 October 2026.

How long does one pack last?

3 days at one 500 mg dose. The pack holds 1.62 g in total.

How much does Optimum Nutrition Opti-Men Multivitamin Tablets cost per 100 mg?

£15.56 per 100 mg, from £21.00 for 90 tablets at Optimum Nutrition, checked on 9 October 2026.

How long does one pack last?

1 day at one 100 mg dose. The pack holds 135 mg in total.

How much does Optimum Nutrition Opti-Men Multivitamin Tablets cost per 100 mg?

£17.50 per 100 mg, from £21.00 for 90 tablets at Optimum Nutrition, checked on 9 October 2026.

How long does one pack last?

1 day at one 100 mg dose. The pack holds 120 mg in total.

How much does Optimum Nutrition Opti-Men Multivitamin Tablets cost per 1 g?

£3.11 per 1 g, from £21.00 for 90 tablets at Optimum Nutrition, checked on 9 October 2026.

How long does one pack last?

7 days at one 1 g dose. The pack holds 6.75 g in total.

About Optimum Nutrition

Founded 1986 · Downers Grove, Illinois, United States · Part of Glanbia

Optimum Nutrition is a US sports nutrition brand founded in 1986 and headquartered in Downers Grove, Illinois. It has been owned since 2008 by Glanbia plc, an Irish nutrition group. It sells protein powders, including Gold Standard 100% Whey, as well as clear protein, creatine, pre-workout, electrolytes, collagen and vitamins.

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