Updated September 30, 2026 · ThriveCue Editorial Team
Gruns vs KoRo
Gruns vs KoRo: the differences
| Compare |  Gruns |  KoRo |
|---|---|---|
| Price from | $29.99 | €19.50 |
| Price per serving | $1.07 | €0.010 |
| Third-party tested | YesHas it | No |
| Certifications | Nsf, Gmp | Organic |
| Money-back period | 30 daysHigher | 14 days |
| Markets | US | DE |
| Subscription discount | 55% | Not confirmed |
We earn a commission when you sign up through links on this site. Partner status can affect where a brand appears in our rankings.
Key differences
- Gruns scores higher overall: 9.4 vs 9.1.
- Third-party tested: only Gruns.
- Money-back period is higher at Gruns: 30 days vs 14 days.
- Support channels: only Gruns offers Chat.
- Certifications: only Gruns offers Nsf, Gmp.
- Certifications: only KoRo offers Organic.
- Products: only KoRo offers Omega 3, Probiotics, Collagen.
- Diets: only Gruns offers Gluten free.
- Diets: only KoRo offers Vegetarian.
- Markets: only Gruns offers US.
Our verdict on each
Gruns
Gruns is a US supplement brand that suits adults who want a single daily routine covering greens and vitamins minerals at a serving cost of $1.07. Third-party testing and certification to nsf and gmp back it up, and the money back window gives time to judge it.
KoRo
KoRo suits adults inside Germany who want a broad supplement range at a low cost per serving rather than a plan or a subscription. The money back window of 14 days and the DE reach keep the commitment small, though products are not third-party tested and the listed certification is organic.
Score breakdown
| Area | Gruns | KoRo |
|---|---|---|
| Cost | 9.1Entry price of $29.99 and a serving cost of $1.07 put the monthly outlay in the middle of the field. | 9.7HigherPrice from ranks 44 of 157 brands, while a serving cost of €0.01 ranks 1 of 121 on cost. |
| Offer | 9.5HigherProduct types run to greens and vitamins minerals and third-party testing is stated across the range. | 8.6Product types cover vitamins minerals, omega 3 and probiotics, diets cover vegan and vegetarian and flavors number 4 flavours. |
| Trust | 9.7HigherCertification to nsf and gmp and a 30 day money back window sit behind the brand. | 8.8Third-party tested is no, the listed certification is organic, and support runs on email, phone and help centre from a company based in DE. |
Side by side, item by item
| Certifications | Gruns | KoRo |
|---|---|---|
| Nsf | Yes | No |
| Gmp | Yes | No |
| Organic | No | Yes |
Which one suits you
Pick Gruns if offer, trust, third-party tested, and money-back period matter most.
Pick KoRo if cost matter most.
Availability and regulation
| Country | Gruns | KoRo |
|---|---|---|
| Headquarters | United States | Germany |
How they place
| Ranking | Gruns | KoRo |
|---|---|---|
| Vitamins and multivitamins | 15 of 362 | 13 of 362 |
| Gut health, greens and collagen | 15 of 172 | 14 of 172 |
Every fact side by side
| Fact | Gruns | KoRo |
|---|---|---|
| Products | Greens, Vitamins minerals | Vitamins minerals, Omega 3, Probiotics, Greens, CollagenCovers more |
| Diets | Vegan, Gluten free | Vegan, Vegetarian |
| Legal entity | Gruns Nutrition, Inc. | KoRo Handels GmbH |
| Headquarters | United States | Germany |
| Support channels | Email, Help centre, Phone, ChatCovers more | Email, Phone, Help centre |
Sports nutrition
| Fact | Gruns | KoRo |
|---|---|---|
| Flavours (flavours) | Not confirmed | 4 |
Where each stands against the rest
| Fact | Gruns | KoRo | Median |
|---|---|---|---|
| Subscription discount | 55%highest quarter | Not confirmed | 15% |
| Money-back period | 30 daysat the median | 14 daysbelow the median | 30 days |
Median across 167 listed brands.
Pros and cons
Gruns
Pros
- Covers greens and vitamins minerals in one brand, so a daily routine does not need splitting across makers.
- Third-party testing is stated, and the products carry nsf and gmp certification.
- Subscription orders are reduced by 55%, which is the cheapest way to hold the daily price at $1.07 a serving.
Cons
- Gruns sells in US only, so buyers elsewhere cannot order from the brand directly.
- The subscription discount of 55% is tied to repeat orders, and the entry price of $29.99 is the figure at the top of the range.
- Product types cover greens and vitamins minerals, and a wider range sits at DocMorris, which lists multivitamins, vitamins minerals and omega 3.
KoRo
Pros
- A serving cost of €0.01 makes daily use inexpensive, and the entry price of €19.50 keeps a first order small.
- Range spans vitamins minerals, omega 3 and probiotics, wider than the vitamins and minerals focus at ProSolution Plus and TestRX.
- Products suit vegan and vegetarian diets, and the listed certification is organic.
Cons
- Third-party tested is no, and the listed certification is organic, so an independent potency check sits outside what is stated.
- Price from ranks 44 of 157 brands, so the entry price is not the cheapest in the comparison.
- The range covers DE only, which is narrower than a multi-line pharmacy such as DocMorris.
Who each suits
Gruns
Who it suits
- US adults who want greens and vitamins covered by a single daily subscription rather than separate products.
- Vegan shoppers and anyone avoiding gluten, as the range is vegan and gluten free.
- Readers who care about independent testing and named certification, since the products are third-party tested and carry nsf and gmp.
Who should look elsewhere
- Buyers outside the US, since Gruns operates in the United States only.
- Shoppers who want a single specific product such as omega-3, probiotics, collagen or electrolytes, which sit with DocMorris at multivitamins, vitamins minerals and omega 3.
- People who would rather test a men's health brand such as ProSolution Plus or TestRX, where vitamins minerals and vitamins minerals are the only listed types.
KoRo
Who it suits
- Adults in DE who order one-off supplements rather than a plan
- Vegan and vegetarian shoppers, since the diets listed are vegan and vegetarian
- People who weigh cost per serving above all, given the rank of 1
Who should look elsewhere
- Shoppers who require third-party tested products, since third-party tested is no
- Anyone outside DE, where the range does not reach
- Buyers chasing sleep, stress and nootropic lines, listed for DocMorris in multivitamins, vitamins minerals and omega 3 but not part of vitamins minerals, omega 3 and probiotics
Current offers
Gruns
Current offer
Discount code
Save 55% on your first order (SMS signup): 55%
Sign up for the SMS offer; by providing your number and clicking the button you agree to receive recurring auto-dialed marketing SMS. Offer assumes customer has received and uses promotional SMS discount reserved for new customers only.
Source, checked September 30, 2026
KoRo
Current offer
Discount code
5% off next order for newsletter signup: 5%
Sign up for the KoRo newsletter by email; discount applies to the next order
Source, checked September 30, 2026
Country by country
| Country | Gruns | KoRo |
|---|---|---|
| United States | Yes | No |
Questions about each
Gruns
How much does Gruns cost at the point of buying?+
The entry price is $29.99 across the collection. That is the figure a reader meets first when ordering. Once a routine is running, the cost that matters is the serving price of $1.07. Keep the two apart, since they are different numbers for different stages of buying.
What does a Gruns subscription cost over time?+
Repeat orders carry a discount of 55%, and that is the route that holds the serving price down. A one-off order pays the entry price of $29.99 instead, so the ongoing figure only applies on a schedule. A 30 day money back window gives a first order time to be judged.
KoRo
How much does KoRo cost?+
Prices start at €19.50, and the cost per serving is €0.01. The first figure matters for a single purchase, the second for anyone taking a product every day. The price shown is the one you pay, so no second bill arrives later.
Is KoRo cheaper than rival supplement brands?+
It depends which measure you use. On price from, KoRo ranks 44 of 157 brands, so the entry price sits mid-table. On price per serving it ranks 1 of 121 brands, the stronger result of the two for a daily user.