Immortelle (Helichrysum italicum), also known as everlasting or curry plant, has a long history of use in traditional herbal medicine, especially in Mediterranean regions. Traditionally, it has been applied topically to support skin healing, reduce bruising, and improve the appearance of broken capillaries and varicose veins. Folk medicine practitioners have used it for its purported anti-inflammatory, antioxidant, and vasoprotective properties, which are believed to benefit the capillary system by strengthening blood vessel walls and reducing capillary fragility.

Scientific evidence directly supporting its efficacy for capillary health is limited. Most available studies focus on Helichrysum extracts' antioxidant and anti-inflammatory effects in vitro or in animal models. A few laboratory studies have demonstrated activities such as inhibition of inflammatory enzymes (like COX-2) and free radical scavenging, which could theoretically protect vascular structures. However, clinical trials specifically assessing its benefit on human capillaries or related conditions (such as chronic venous insufficiency or rosacea) are lacking.

In summary, while the traditional use of Immortelle for supporting capillary health is well-documented and there is some mechanistic rationale based on laboratory research, robust scientific validation in humans does not yet exist.