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Choosing a prostaglandin-free lash serum usually means comparing bottles that look nearly identical on a shelf. SOWN turns that comparison into three separate decisions by offering Root 1 for lashes, Root 2 for brows, and a combined Bundle for both. This piece walks through what each formulation claims to deliver and where the ingredient approach stays consistent across the range.
What Sets SOWN’s Prostaglandin-Free Approach Apart
Many lash-growth products rely on prostaglandin analogs, which can cause redness or irritation in some users. SOWN markets its entire line, including Root 1, Root 2, and the Bundle, as free of those ingredients. That positioning runs through every product description, every ingredient list, and the brand’s own ingredient-checker tool, which lets someone paste a formula and see whether prostaglandin-related names appear.
Each formula is described as hypoallergenic, non-irritating, and vegan friendly, with cruelty-free and Made in USA labeling attached across the range. The products are also described as ophthalmologist reviewed and clinically tested, which forms the backbone of the safety claims. That combination is part of what separates a prostaglandin-free lash serum from analog-based alternatives that still dominate much of the category.
Root 1 Lash Growth Serum: Targeted Lash Nourishment
Root 1 is built specifically for lashes and is described as delivering 4-in-1 results within 3 to 12 weeks of use. The formula combines three peptides, five botanicals, and six vitamins, specifically B3, B5, B6, B7, C, and E, in a single vegan and cruelty-free serum. No prostaglandin analog appears in its ingredient list, which keeps it aligned with the wider line’s standard.
In a first-party consumer perception study with 32 participants over a 12-week period, 93% of participants reported noticing longer, fuller-looking lashes, and 96% noticed thicker-looking lashes. The same study reported 0% experienced sensitivity. Root 1 was developed with input from trichologists, dermatologists, and ophthalmologist testing, according to the product description.
Root 2 Eyebrow Growth Serum: Brow-Specific Strengthening
Root 2 shifts the focus entirely to brows, aiming to grow, strengthen, and target over-plucked, thin, or sparse eyebrows. SOWN’s product description states that it can reveal darker, thicker, fuller eyebrows in as little as 28 days. Like Root 1, it is powered by what the brand calls RootBoost Technology, described as a clinically backed botanical, vitamin, and peptide complex.
Independent of Root 1’s lash-specific study, Root 2 carries its own reported outcomes. According to the brand’s comparison page, 92% of users saw thicker brows, with 0% irritation reported. That distinction matters for anyone weighing the two single-product options, since the lash and brow formulas are tested and marketed with separate figures rather than shared ones.
The Lash & Brow Growth Serum Bundle: Dual-Action Coverage
The Lash & Brow Growth Serum Bundle pairs Root 1 and Root 2 in one offering, available as a Single Bundle or a Twin Bundle, and its product page reports that 93% of users saw longer lash growth while 92% saw thicker brow growth. SOWN describes the duo as delivering 4-in-1 results across both lashes and brows, including growing new hairs, lengthening existing ones, locking in moisture, and reducing brittleness. It also claims to support the hair cycle by extending the anagen growth phase.
Because the Bundle simply packages the two existing serums, the underlying ingredient science does not change whether the products are bought separately or together. Anyone comparing the three options should note that neither formula is altered or diluted to fit the combined offering. The choice, in that sense, is about coverage rather than potency.
RootBoost Technology and Botanical Ingredients Across the Line
RootBoost Technology is the trademarked ingredient complex that SOWN uses across Root 1, Root 2, and the Bundle, and the brand pairs that formula with a claim that its serums are entirely hormone-free, a point repeated on the Root 1, Root 2, and ingredient-checker pages. The company’s own comparison page also places Root 1 against eight other prostaglandin-free lash serums on the market, weighing ingredients and evidence side by side. That comparison frames Root 1’s peptide and botanical count as part of a broader category of clean, non-hormonal lash formulas rather than an isolated claim.
The lineup is also backed by a 90-day growth guarantee, which requires photos at day 1 and at weeks 4, 8, and 12 to qualify for a refund if no visible growth appears. Shipping across the range is listed as arriving within 2 to 5 business days for US orders. Those policies apply the same way regardless of which of the three products is chosen.
- Root 1 reports 93% of participants noticing longer, fuller-looking lashes and 96% noticing thicker-looking lashes after a 12-week consumer study.
- Root 1’s formula combines three peptides, five botanicals, and six named vitamins in a single prostaglandin-free lash serum.
- Root 2 reports 92% of users seeing thicker brows with 0% irritation, alongside claims of visible change in as little as 28 days.
- The Lash & Brow Growth Serum Bundle reports 93% seeing longer lash growth and 92% seeing thicker brow growth, matching the individual product figures.
- All three products share RootBoost Technology, described as a clinically backed botanical, vitamin, and peptide complex.
- The full range carries hypoallergenic, non-irritating, vegan friendly, cruelty-free, and Made in USA labeling.
Choosing Between Single-Product Focus and Combination Growth
Someone focused only on lash length and fullness has a clear single option in Root 1, backed by its own 12-week study results. Someone dealing specifically with thin or over-plucked brows has Root 2, with its 28-day visibility claim and separate reported outcomes. For those addressing both areas at once, the Bundle combines the two formulas without altering the ingredient approach behind either one.
In practice, the decision comes down to which area needs attention rather than any difference in formulation quality, since the same RootBoost Technology and prostaglandin-free standard runs across all three. The 90-day growth guarantee applies regardless of which option is selected, giving a consistent policy across the lineup. That keeps the comparison simple: match the product to the area of concern, not to a different level of science.
Lashes, brows, or both, SOWN‘s range stays anchored to the same prostaglandin-free standard throughout.
