SuppRankedGruns vs One A Day: Amazon sales compared
By SuppRanked's estimates, One A Day brings in about $3.7M/mo on Amazon versus $3.6M/mo for Gruns (about the same), on ~200K vs ~58K units a month. They meet in 2 lists or markets, and Gruns leads in every one despite the smaller total (est.).
Side by side
| Metric | Gruns | One A Day |
|---|---|---|
| Est. revenue/mo | $3.6M | $3.7M |
| Est. units/mo | 58K | 200K |
| Rank by est. revenue | #47 | #45 |
| SuppRanked rank | #114 | #57 |
| Best-selling products | 9 | 14 |
| Lists ranked in | 6 | 5 |
| #1 list ranks | 3 | 0 |
Head to head where they compete Est. revenue/mo in each list or market · position by est. revenue
| List / market | Gruns | One A Day |
|---|---|---|
| Multivitamins Market | $3.3M | $2.7M |
| Gummy Supplements Market | $3.6M | $221K |
History Est. revenue/mo by day · like-for-like, gaps where data changed · how
Gruns
One A Day
Top products By est. revenue/mo
Gruns
One A Day
- One A Day Multivitamin for Men - Daily Mens Multivitamins with… · ~$961K/mo est.
- One A Day Prenatal Advanced- Prenatal Vitamins with Folic Acid… · ~$453K/mo est.
- One A Day Men’s 50+ Healthy Advantage Multivitamin, Multivitamin for… · ~$449K/mo est.
Watch this rivalry weekly
Rank and est. sales changes for both brands, or every brand as a CSV.
FAQ
Which sells more on Amazon, Gruns or One A Day?
By SuppRanked's estimates, One A Day sells more: about $3.7M/mo in Amazon revenue versus $3.6M/mo for Gruns, and ~200K vs ~58K units a month. These are SuppRanked's modeled estimates from public Amazon Best Sellers ranks and list prices (October 18, 2026), not official Amazon sales data.
Who sells more Multivitamins on Amazon, Gruns or One A Day?
In Multivitamins, the ingredient market where they compete most, Gruns leads with ~$3.3M/mo against ~$2.7M/mo for One A Day. Modeled estimates, October 18, 2026, not Amazon data.