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Identifying the top brand of vitamins is challenging because the Food and Drug Administration (FDA) does not regulate the vitamin and supplement industry. Due to this lack of regulation, people must rely either on testing and ratings from independent, third-party organizations or companies’ own statements about their products.

In this article, we explain how some organizations assess the quality of vitamins and supplements, and we review some of the best brands.

The United States Pharmacopeia (USP) is an independent organization that verifies and certifies products that meet specific quality standards. To be USP verified, a product must:

  • not contain a certain number or quantity of contaminants
  • contain the ingredients on its label in advertised amounts and potencies
  • break down properly in the body

In addition, the company must follow the FDA’s current Good Manufacturing Practices (GMP) concerning sanitation and control.

For nearly 2 decades, U.S. News & World Report and Pharmacy Times have collaborated on an annual survey that goes out to pharmacists nationwide.

The survey asks pharmacists for their top picks of various healthcare-related products, including vitamins and supplements, and these are issued with seals. Anyone looking for this seal should be sure that it reflects the current year’s winning products.

Please note that no one at Medical News Today, including the writer, has tested these products. All information is research-based.


Care/of is a company that assesses each customer on their overall health and uses that information to create a personalized vitamin subscription plan.

Their products are not USP certified. The company says that its vitamins and supplements are “thoughtfully curated” and contain premium ingredients backed by scientists.

They offer:

The company says that its products suit people with a wide range of dietary restrictions. The prices vary depending on the personalized plan.

Learn more about Care/of here.


Ritual is a subscription service that offers multivitamins tailored to each person’s stage of life.

The company says that its products are high quality and made from traceable ingredients. Its Essentials for Women 18+ range is also USP verified.

Ritual offers multivitamins that are:

  • for kids and teens
  • for men
  • for women
  • prenatal
  • postnatal

The price depends on each person’s monthly subscription plan.


Persona is a personalized subscription service that delivers vitamins and supplements on a monthly basis.

The products are not USP-verified. The company says that what it recommends has been approved by doctors and that its ingredients have been tested multiple times for quality. Each product comes with a safety certificate.

Each customer has an assessment and based on this, the company says that it works with doctors and professional nutritionists to find a combination of vitamins and supplements that meets the person’s needs.

Persona sells a variety of products, including:

Learn more about Persona here.


The quality and origin of this company’s supplements have been verified by multiple third-party organizations.

MegaFood sells a range of vitamins and supplements, including:

Nature Made

Nature Made offers several vitamins and supplements that have USP verification and the #1 Pharmacist Recommended seal.

The range includes:

  • multivitamins
  • prenatal vitamins
  • individual vitamins, such as A, C, and D
  • minerals

Kirkland Signature

Kirkland Signature is a Costco Wholesale brand that sells several USP-certified vitamins and minerals.

The range includes:

  • individual vitamins, such as A, C, and D
  • multivitamins
  • minerals
  • fish oil

The prices are generally lower than those of other brands.

Klean Athlete

Klean Athlete says that its products are made by and for athletes and have the Certified for Sport certificate from NSF International.

NSF International is a third-party reviewer of sports-related supplements and products. Its certification indicates that products are free from contaminants and adhere to the regulations of sports organizations.

Klean Athlete sells a wide range of products, including:

  • probiotics
  • vitamins
  • recovery supplements

Life Extension

Life Extension’s products do not undergo third-party analysis, but a ConsumerLab.com survey rated some of their supplements highly in 2019.

Life Extension sells a range of supplements, including:

Nordic Naturals

Nordic Naturals claims to test its products thoroughly. On request, the company provides its own certificate of analysis for every product. ConsumerLab.com has also tested and verified some of these products.

Nordic Naturals sells a range of vitamins and supplements, including:

  • omega-3s
  • probiotics
  • multivitamins


SmartyPants provides batch-specific certificates of compliance for their products. However, it is not clear whether this certification is based on third-party analyses.

SmartyPants sells a range of vitamins and supplements, including those for:

Thorne Research

Some of this company’s products have been certified to meet manufacturing, purity, and potency standards by organizations such as the Therapeutic Goods Administration, which is an Australian government agency, and NSF International.

Thorne Research sells a range of vitamins and supplements, including:

  • amino acids
  • omega-3s
  • supplements for bone and joint health

Standard Process

Standard Process says that it performs various testing and quality control checks at different stages of production and that these analyses are similar to those of the USP.

However, no third-party organization has certified these products.

The company sells gluten-free products for people with gluten intolerance or celiac disease.

Garden of Life

Garden of Life sells a variety of supplements, from multivitamins to probiotics. They may be especially suitable for people looking for supplements that are free from gluten, soy, dairy, and other animal products.

The supplements have certifications from NSF International, for example, as well as certifications that they are organic and do not contain genetically modified organisms.

Amazon Elements

Amazon Elements is a relatively new brand, and its products are available to buy online using an Amazon Prime account.

It says that its vitamins and supplements have been thoroughly tested, though they do not have USP verification.

The company also says that its products are made in a facility in the U.S. that follows GMP guidelines and that each product has a certificate of analysis that is accessible via QR labels on the packaging.

Amazon Elements offers a variety of products for men and women, including multivitamins, such as biotin, and iron supplements.

Anyone interested in taking vitamins or other supplements should speak with a doctor first.

Before making a purchase, check whether the product has undergone a quality analysis. It may be best to opt for supplements that have third-party verification.