
A lash serum that works, without prostaglandins: The guide to choose
By choosing a lash growth serum with safe, nourishing ingredients, you can achieve beautiful, healthy lashes without compromising your well-being. Avoiding those that have prostaglandins and phenoxyethanol in them and choosing those that have natural, healthy ingredients will allow you to grow out your lashes in a healthy manner.
Long, luscious lashes are a common dream. But choosing a lash growth serum that is effective as well as safe is a considerate move that means considering its ingredients. In this article, we examine some risks that have been attributed to certain ingredients and consider some tips on choosing a healthy, effective lash growth serum.
The Hidden Risks in Eyelash Serums with Prostaglandins
Prostaglandin analogs are synthetic chemicals in some lash serums that are known to enhance lash growth in terms of both length and density. Originally developed as a treatment for glaucoma, these chemicals have serious side effects that can be experienced when applied topically as a cosmetic.
- Orbital Fat Reduction (Prostaglandin-Associated Periorbitopathy): Studies have established that local application of prostaglandin analogs can cause a loss of periorbital fat, resulting in a sunken or hollowed look around the eyes.
- Adipogenesis Inhibition: Prostaglandin analogues can suppress the formation of new fat cells (adipogenesis) as well as promote fat breakdown, leading to orbital fat atrophy.
- Further Side Effects: Some users may experience eye irritation, redness, darkening of eyelid skin, and even a shift in eye color, particularly in those with light-colored irises.

Phenoxyethanol: A Widespread Preservative with Safety Concerns
Phenoxyethanol is a frequently used cosmetic preservative that effectively prevents microbial growth. However, its use in lash serums comes with concerns:
- Allergic Contact Dermatitis and Irritation: Some users may develop eczema, rashes, hives, or skin irritation due to phenoxyethanol exposure.
- Systemic Toxicity: While generally considered safe at concentrations below 1% in cosmetics, research suggests that excessive phenoxyethanol can pose a threat to the nervous system.
- Environmental Impact: Phenoxyethanol is also toxic to aquatic organisms, raising concerns about its environmental effects when these chemicals enter water bodies.
A safer alternative to phenoxyethanol includes preservatives like potassium sorbate or sodium benzoate, which pose minimal health risks.
Essential Ingredients in a Safe and Effective Eyelash Growth Serum
When selecting a lash growth serum, opt for formulas that do not contain prostaglandins or phenoxyethanol. Instead, look for natural, beneficial ingredients such as:
- Biotin (Vitamin B7): Supports keratin production, which is essential for strong, healthy lashes.
- Castor Oil: Contains ricinoleic acid that deeply nourishes, moisturizes, and strengthens lashes, stimulating growth.
- Panthenol (Pro-Vitamin B5): Enhances moisture retention, keeping lashes hydrated and resilient.
- Hyaluronic Acid: Provides deep hydration, improving lash flexibility and minimizing breakage.
- Arginine and Lysine: Essential amino acids that act as building blocks for keratin, playing a key role in lash growth.
Nakungoo Lash & Brow Growth Serum: A Safe Alternative

Nakungoo offers a prostaglandin-free, phenoxyethanol-free Lash & Brow Growth Serum, formulated with natural ingredients that promote lash and brow health without adverse side effects. Made in Italy, this serum combines biotin, castor oil, panthenol, and hyaluronic acid to nourish and strengthen your lashes and brows safely.
Key Benefits:
- All-Natural and Gentle: Free from harmful chemicals, making it ideal for sensitive eyes and skin.
- Visible Results: Consistent use leads to noticeably longer, thicker lashes and fuller brows.
- Easy Application: Designed for daily use with a lightweight, non-greasy feel.