What it is and why it's in the formula
Walnut oil (Juglans regia) contributes additional fatty acids to the formula's conditioning profile. It's a less common but well-regarded oil in natural skincare, chosen here as part of the broader 16-oil blend rather than as a standalone headline ingredient.
Where it fits in the full formula
Walnut Oil is one of 16 ingredients disclosed openly on the PureNail Pro label — none of the formula sits behind vague "proprietary blend" wording. You can see the complete breakdown, including which oils pair with it, on the full ingredients page.