Sea Buckthorn Oil

Supplements · Fatty Acids · Supplement, Typed Supps

An oil from a bright orange berry that’s one of the few plant sources of a less-common fat called omega-7, with real clinical trial support for dry eyes specifically.

Stage by stage

Intake (Oil capsule): Taken orally, typically with a meal.
Small intestine (Absorption): Absorbed alongside dietary fat via bile-dependent micelle formation.
Bloodstream (Circulates): Delivers omega-7 and other fatty acids to tissues throughout the body.
Tear film and skin (Membrane incorporation): Incorporated into tear film and cell membrane lipids, supporting moisture retention.

What the evidence supports

Improving dry eye symptoms and tear film measures with regular oral use — moderate evidence. A randomized, double-blind, placebo-controlled trial of 100 participants taking 2g/day of sea buckthorn oil for 3 months found significantly less increase in tear film osmolarity and improvement in dry eye symptoms compared to placebo — a reasonably solid single trial, though the evidence base is not large.
Improving skin hydration, elasticity, or other measures of skin health — limited evidence. Several smaller randomized trials report improvements in skin hydration and elasticity with oral sea buckthorn oil over several weeks, but study sizes are modest and the overall literature is not yet large or highly consistent.
Improving mucosal dryness symptoms in Sjogren’s syndrome — limited evidence. A placebo-controlled trial in women with Sjogren’s syndrome found improvement in mucosal dryness symptoms with oral sea buckthorn oil, a promising but single, relatively small study in a specific patient population.

Typical dose

2g/day was used in the main dry eye and Sjogren’s syndrome trials, typically as oil-filled capsules.

Upper limit: No established UL for sea buckthorn oil.

Timing

With a meal containing some fat, matching the dosing used in the supportive trials.

Time to effect

About 3 months: Both the dry eye and Sjogren’s syndrome trials measured benefit after approximately 3 months of consistent daily use, not sooner.

Common myth

“Sea buckthorn oil is a proven cure-all for skin, eyes, and overall wellness.” In reality: The strongest clinical evidence is specifically for dry eye and mucosal dryness symptoms at a defined 2g/day dose over about 3 months — broader skin and general wellness claims rest on a smaller, less consistent body of research.