fatty15 vs Gruns Greens
In our scoring, Gruns Greens edges ahead overall (7.5 vs 6.6 out of 10).
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Key differences
- Price
- fatty15 $50/mo; Gruns Greens $59.99 every 4 weeks or $63.74 every 4 weeks (different products and plans, so neither is marked cheaper)
fatty15
Affiliate partnerBest for single-ingredient C15:0 longevity supplement
30-day supply, recurring
$50
Our score 6.6/10
Gruns Greens
Affiliate partnerBest for daily-multivitamin gummy as a GLP-1 nutrition adjunct
Subscribe & Save, 28 packs each 4 weeks
$59.99
billed every 4 weeks · $39.99 first month
Our score 7.5/10
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Costs & coverage
Published prices with their terms attached. Yearly figures are modeled from the standing price and billing cadence. A check mark marks the better side, on like-for-like rows only.
fatty15
Gruns Greens
Price
Lowest listed price
$50/mo
30-day supply, recurring
$59.99/mo
Subscribe & Save, 28 packs each 4 weeks · billed every 4 weeks · $39.99 first month
Next listed plan
Not listed
$63.74/mo
Subscribe & Save, 28 packs each 4 weeks · billed every 4 weeks · $43.74 first month
Terms & safety
Price shown
Not disclosed
Before intake
FDA warning letters
None on record
None on record
Provider facts checked
August 2026
August 2026
Every dose and plan: fatty15 · Gruns Greens
Which fits your priorities?
Only the points where these two differ, from the table above and each provider’s record.
Choose fatty15 if…
- Single-ingredient C15:0 supplement with a clear cell-membrane mechanism and published research behind it
- Strong brand recognition from high-profile longevity marketing
- C15:0 is hard to get from diet alone (mainly dairy fat), giving supplementation a defensible rationale
What to weigh up
- Pricing, ingredient panel, third-party lab testing, and longevity claims haven't been independently confirmed
- Whether C15:0 should be classified as an essential fatty acid is the company's own positioning, not settled consensus
Choose Gruns Greens if…
- Gummy format is dramatically more compliance-friendly than powdered greens or capsule multivitamins
- Useful for GLP-1 patients who experience reduced appetite and need a low-volume way to maintain micronutrient intake
- Widely recognized brand, backed by high-visibility marketing campaigns through 2024-2025
What to weigh up
- Exact ingredient panel, third-party lab testing and pricing tiers aren't listed on the pages we reviewed
- Not a substitute for clinical nutrition management — greens supplements have weak evidence relative to whole-food vegetable intake
Explore the scoring factors
Both providers are scored on the same six-dimension framework. The gradient bar marks the stronger side on each dimension.
fatty15
6.6/10
Gruns Greens
7.5/10
Value25%
Effectiveness25%
User Experience15%
Trust & Safety15%
Accessibility10%
Support10%
fatty15 vs Gruns Greens: FAQ
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Or see the full category ranking.