Best skin & coat supplements, ranked.

The strongest-evidence omega active, fully disclosed in triglyceride form and third-party tested; a partial per-softgel dose for a larger dog keeps it just under the top.

A disclosed, well-dosed salmon and pollock omega oil, NASC-sealed and inexpensive per day; strong execution puts it near the top. The Feb 2025 Zesty Paws recall covered soft chews, not this oil.

High disclosed EPA and DHA per pump in natural triglyceride form, NASC-audited, and inexpensive per day; strong execution lands it at the top of Good.

A triglyceride-form fish oil third-party tested for purity and keyed to the feline skin and coat evidence; a typical cat reaches only a partial share of the studied EPA and DHA dose at the labeled serving, which keeps it Good rather than Strong.

A disclosed fish-oil liquid delivering an EPA and DHA dose near the feline dermatology target, keyed to the cat skin and coat evidence; well made, though the fish-oil form is not stated and the scoop count is derived.

A fish-oil softgel that discloses EPA and DHA separately in the more bioavailable triglyceride form, NASC-sealed and fairly priced, keyed to the skin and coat claim; the omega evidence for skin sits a notch below the joint tier and the per-softgel dose is moderate, so clean execution lands it Good.

A disclosed, well-made omega-3 keyed to the skin and coat claim (a notch below the joint evidence tier); solid execution and value land it Good.

Discloses EPA and DHA separately in an NASC gel cap from a maker that owns its cGMP plant, but the weight-scaled label dose delivers only about 20 mg/kg/day of EPA plus DHA, below the studied skin and coat range, and there is no independent testing.

An emulsified fish-oil packet that discloses EPA and DHA separately and reaches a borderline-adequate skin and coat dose at one packet, at a fair price; but its NASC claim is not in the current directory so we do not credit it, and there is no independent testing.