Kirkland Signature Mature Multi Adult 50+ Vitamins Supplement Review

Kirkland Signature Mature Multi provides your body with a daily dose of vitamins and minerals. This has been specially formulated for adults aged 50+, to support a healthy immune system, strong bones and teeth, eye health, and antioxidant activity.

But with 417% of your Vitamin B12 RDA per 1 tablet serving, how do you know if this is a safe dose? What if you’re already taking a protein powder with its own multivitamin complex?

In this review we compare Mature Multi to two other top multivitamins; Rainbow Light Active Adult 50+, and Centrum Silver (men’s and women’s). This includes ingredients, dosages, cost per serving, price, and customer feedback from the thousands of reviews on Amazon.

We’ve also added recommendations for the best protein powder to combine with Mature Multi. This is to help maintain a healthy balance between your vitamin, mineral, Omega-3, probiotic, and protein intake.

Kirkland Signature Mature Multi Ingredients

Kirkland Signature Mature Multi Ingredients

Mature Multi is a specially formulated multivitamin that provides you with a large amount of calcium (220 mg). This is more than you’ll find in almost every multivitamin on the market, including Rainbow Light Men’s One (50 mg) and the bestselling Dr. Tobias Multivitamin (175 mg).

In addition to a high dose of calcium, Mature Multi includes 110 mg of phosphorus per serving, which promotes healthy bones, skin and hair, and supports brain health. Very few adult multivitamins contain phosphorus at this level. For comparison, the Dr. Tobias supplement only contains 72 mg per serving.

Most other major vitamins have been added at levels that meet or exceed 100% of your DV. This includes 90 mg of vitamin C (150%) and 500 IU of vitamin D3 (125% DV). But this is much lower than you’ll find in standard multivitamins, as Mature Multi very much has a focus on the bone and teeth health for adults over 50 years of age.

A better all-round option would be the Centrum Adults Multivitamin.

Centrum Adults has slightly less calcium per serving (200 mg), and far less phosphorus (20 mg), but an additional 1000 IU of vitamin A and 500 IU more vitamin D. The only downside to Centrum Adults is that it doesn’t provide you with much energy, containing just 2 mg of vitamin B6 and 6 mcg of vitamin B12 per serving.

If you’re looking for a high level of calcium (237 mg), vitamin A (15000 IU), vitamin C (1000 IU) and vitamin D (1000 IU), in addition to high energy levels (50 mcg of vitamin B6 and 200 mcg of vitamin B12), Nature’s Way Alive Max Daily is a better option than Kirkland Signature Mature Multi. Just be prepared to pay up to 500% more per serving ($0.38 vs. $0.07 at time of writing).

What’s in Kirkland Signature Mature Multi?

Kirkland Signature Mature Multi Multivitamin Ingredients Label
Ingredient Amount per Serving % of Daily Value
Vitamin A 2,500 IU 40%
Vitamin C 90 mg 150%
Vitamin D3 500 IU 125%
Vitamin E 50 IU 167%
Vitamin K 30 mcg 38%
Thiamin (Vitamin B1) 1.5 mg 100%
Riboflavin (Vitamin B2) 1.7 mg 100%
Niacin 20 mg 100%
Vitamin B6 3 mg 150%
Folic Acid 500 mcg 125%
Vitamin B12 25 mcg 417%
Biotin 30 mcg 10%
Pantothenic Acid 10 mg 100%
Calcium 220 mg 22%
Phosphorus 110 mg 11%
Iodine 150 mcg 100%
Magnesium 50 mg 13%
Zinc 11 mg 73%
Selenium 55 mcg 79%
Copper 0.9 mg 45%
Manganese 2.3 mg 115%
Chromium 45 mcg 38%
Molybdenum 45 mcg 60%
Chloride 72 mg 2%
Potassium 80 mg 2%

Also contains:
Boron 150 mcg, Nickel 5 mcg, Silicon 2 mg, Vanadium 10 mcg, Lutein (flower) 250 mcg, Lycopene 300 mcg

Kirkland Signature Mature Multi Adult 50+ Vitamins Supplement

Kirkland Signature Mature Multi – Product Summary

  • Kirkland Signature Mature Multivitamin Supports Heart Health, Eye Health
  • Supports Immune Health, Bones & Teeth
  • Antioxidant Protection
  • With Lycopene & Lutein, and Calcium and Vitamin D
  • No Artificial Colors, Artificial Flavors , No Preservatives, No Yeast or Gluten
  • Serving Size: 1 Tablet

Health benefits of Kirkland Mature Multi

Our recently updated multivitamin guide contains a complete list of health benefits associated with the vitamins found in Kirkland Signature Mature Multi.

When is the best time to take it?

Recommended use

Take one tablet daily, preferably with a meal.

Mature Multi vs. Rainbow Light Active Adult 50+

Kirkland Signature Mature Multi
Rainbow Light Active Adult
Vitamin A: 2,500 IU
Vitamin A: 900 IU
Vitamin B6: 3 mg
Vitamin B6: 13 mg
Vitamin B12: 25 mcg
Vitamin B12: 50 mcg
Vitamin C: 90 mg
Vitamin C: 55 mg
Vitamin D: 500 IU
Vitamin D: 2,000 IU
Biotin: 30 mcg
Biotin: 30 mcg
Container size: 400
Container size: 30
Serving size: 1
Serving size: 1
Cost per serving: $0.04
Cost per serving: $0.49

Mature Multi vs. Centrum Silver Adults 50+

Kirkland Signature Mature Multi
Centrum Silver Multivitamin
Vitamin A: 2,500 IU
Vitamin A: 2,500 IU
Vitamin B6: 3 mg
Vitamin B6: 3 mg
Vitamin B12: 25 mcg
Vitamin B12: 25 mcg
Vitamin C: 90 mg
Vitamin C: 60 mg
Vitamin D: 500 IU
Vitamin D: 1,000 IU
Biotin: 30 mcg
Biotin: 30 mcg
Container size: 400
Container size: 220
Serving size: 1
Serving size: 1
Cost per serving: $0.04
Cost per serving: $0.05

What sizes are available?

With a serving size of 1 tablet and a recommended dose of 1 serving per day, each bottle provides you with enough multivitamin support for 400 days. Multi-pack options are available on Amazon where you can buy multiple 400 count bottles together.

However, at the time of writing this review, the best value for money comes from buying the single bottle of 400 tablets, not the multi-packs. Each serving was priced at $0.04, compared to $0.07 for the multi-packs. This is why we always recommend calculating the average cost per serving, across all sizes, before making a final buying decision.

Who are Kirkland Signature?

Kirkland Signature is a line of private-label products, available at Costco. For over 20 years their name has been found on a wide range of product categories, from canned foods to automotive products.

They’ve also developed a highly popular line of health supplements, which includes fish oils, calcium, glucosamine, and multivitamins. Some of the current bestsellers are Extra Strength Glucosamine HCI and Fish Oil Concentrate with Omega 3 fatty acids, each of which has over 1,400 highly rated reviews on Amazon.

Kirkland Signature supplements are USP certified. This is a verified mark awarded to dietary supplement products when they successfully meet all requirements set by the USP Dietary Supplements Verification Process.

Multivitamin Supplement Buying Guide

Mature Multi Review Summary

Overall Review Rating

4.5 / 5

So, is Kirkland Signature Mature Multi the best multivitamin for adults?

One advantage is that, at time of writing this review, Mature Multi was one of the cheapest multivitamins on the market. Even for the smallest 400-count bottle, you were only paying $0.04 per serving, compared to $0.76 for the Dr Tobias Vitality multivitamin.

But levels of biotin and vitamins A, C and D are among the lowest we've seen from a multivitamin.

Folic acid and calcium are high, which helps with bone strength and cognitive function. Very few multivitamins also contain phosphorus (Dr Tobias Vitality does, but 72 mg vs. 110 mg). This can help support healthy bone bone and brain health.

Overall, Mature Multi clearly isn't a high-potency formula, like Optimum Nutrition Opti-Men or Dr Tobias Vitality. But it does have high levels of vitamins and minerals that play an important role in the health of adults over the age of 50.

Considering the low cost, we consider Mature Multi excellent value for money. Alternatively, if you're looking for a multivitamin supplement with higher levels of vitamins and minerals and price isn't a factor, Dr Tobias Vitality is recommended if you still need the phosphorus, or Opti-Men/Opti-Women from Optimum Nutrition if you don't.