Buoy vs fatty15
In our scoring, Buoy edges ahead overall (7.2 vs 6.6 out of 10).
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Key differences
- Price
- Buoy $30.03/mo; fatty15 $50/mo (different products and plans, so neither is marked cheaper)
Buoy
Affiliate partnerBest for GLP-1-companion electrolyte supplement
Hydration Drops, lowest listed price
$30.03
Our score 7.2/10
fatty15
Affiliate partnerBest for single-ingredient C15:0 longevity supplement
30-day supply, recurring
$50
Our score 6.6/10
We may earn a commission if you sign up through these links. Partner status can affect which provider we feature; it never changes a score or a price.
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.
Buoy
fatty15
Price
Lowest listed price
$30.03/mo
Hydration Drops, lowest listed price
$50/mo
30-day supply, recurring
Terms & safety
FDA warning letters
None on record
None on record
Provider facts checked
August 2026
August 2026
Which fits your priorities?
Only the points where these two differ, from the table above and each provider’s record.
Choose Buoy if…
- Liquid format mixes into any beverage — easier compliance than electrolyte powders
- Marketed as sugar-free with no artificial sweeteners
- Useful adjunct for GLP-1 patients who experience electrolyte loss from reduced appetite and rapid weight loss
What to weigh up
- Exact pricing and the per-serving ingredient panel aren't listed on the pages we reviewed
- Not a substitute for prescription electrolyte management in clinically significant cases
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
Explore the scoring factors
Both providers are scored on the same six-dimension framework. The gradient bar marks the stronger side on each dimension.
Buoy
7.2/10
fatty15
6.6/10
Value25%
Effectiveness25%
User Experience15%
Trust & Safety15%
Accessibility10%
Support10%
Buoy vs fatty15: FAQ
Related comparisons
Continue exploring Buoy and fatty15 head-to-heads in the same category.
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- Buoy vs Betterbrand
- fatty15 vs Gruns Greens
- fatty15 vs IM8 Health
- fatty15 vs Betterbrand
Or see the full category ranking.