Side-by-side comparison

First Aid Beauty Ultra Repair Hyaluronic Acid Serum vs The Inkey List Niacinamide Serum

Both are serums. They share a 66% active-ingredient overlap, so the real decision is about price, texture and the supporting ingredients. Here's the side-by-side.

66%Active overlap
First Aid Beauty
Ultra Repair Hyaluronic Acid Serum
SerumMid-rangeMorning or evening
DehydrationSensitivityDamaged Barrier

A multi-weight hyaluronic acid serum with colloidal oatmeal and ceramide support for sensitive, dehydrated skin. A soothing, fragrance-free hydrator that pairs hydration with barrier comfort.

Full analysis →Find dupes →
The Inkey List
Niacinamide Serum
SerumBudgetMorning or evening
OilinessCongestionDark Spots

A 10% niacinamide serum with added hyaluronic acid for oil control and blemish support. A clean, affordable single-active option; broadly comparable to other 10% niacinamide serums with a slightly more hydrating base.

Full analysis →Find dupes →
The verdict

Which should you choose?

On price, the The Inkey List Niacinamide Serum sits in the Budget tier versus Mid-range for the First Aid Beauty — so it's the more budget-led pick if the overlap is what you're after. The First Aid Beauty leans toward Damaged Barrier, Dehydration, Sensitivity. The The Inkey List leans toward Congestion, Dark Spots, Oiliness.

The overlap

What they share

At 66% active overlap, these are the ingredients doing comparable work in both formulas:

Hyaluronic Acid
The formulation

Ingredient stacks, side by side

First Aid Beauty — top of the list

  • Aqua~50–80%
  • Glycerin~5–25%
  • Sodium Hyaluron…~3–10%
  • Hydrolyzed Hyal…~2–6%
  • Avena Sativa Ke…~1.5–4%

The Inkey List — top of the list

  • Aqua~50–80%
  • Niacinamide~5–25%
  • Glycerin~3–10%
  • Sodium Hyaluron…~2–6%
  • Pentylene Glycol~1.5–4%

● marks ingredients that appear near the top of both lists. Percentages are positional estimates from INCI order, not disclosed doses.

At a glance

The specs

First Aid BeautyThe Inkey List
CategorySerumSerum
Price tierMid-rangeBudget
Best forDehydration, Sensitivity, Damaged BarrierOiliness, Congestion, Dark Spots
Usage notesMorning or eveningMorning or evening
Active overlap66% — Hyaluronic Acid
Questions

Common questions

Is the First Aid Beauty Ultra Repair Hyaluronic Acid Serum or the The Inkey List Niacinamide Serum better?
Neither is universally better — they share 66% active-ingredient overlap, so for the actives that drive results they're close. The The Inkey List Niacinamide Serum is the more budget-friendly option, while the other may differ on texture, finish and supporting ingredients. Pick based on your skin's priorities rather than a single 'winner'.
What's the difference between the First Aid Beauty Ultra Repair Hyaluronic Acid Serum and the The Inkey List Niacinamide Serum?
Both are serums that share Hyaluronic Acid. Where they differ: they sit in different price tiers (Mid-range vs Budget); the First Aid Beauty targets Damaged Barrier, Dehydration; the The Inkey List targets Congestion, Dark Spots.
Are the First Aid Beauty Ultra Repair Hyaluronic Acid Serum and The Inkey List Niacinamide Serum dupes for each other?
They share 66% active-ingredient overlap based on published INCI lists, so one can stand in for the other on the actives that matter — chiefly Hyaluronic Acid. A dupe matches the hero actives, not the full sensory experience, so expect differences in texture, fragrance and exact concentrations.
Can I use the First Aid Beauty Ultra Repair Hyaluronic Acid Serum and The Inkey List Niacinamide Serum together?
They both fill the serum slot in a routine, so you'd normally pick one rather than layer both. If you want to use both, treat one as your daytime option and the other for evening, and patch-test when introducing anything new.
Keep comparing

Related comparisons

CeraVe Skin Renewing Vitamin C Serum (10% Pure) vs First Aid Beauty Ultra Repair Hyaluronic Acid Serum
77% overlapFirst Aid Beauty Ultra Repair Hyaluronic Acid Serum vs Vichy Minéral 89 Hyaluronic Acid Booster
70% overlapFirst Aid Beauty Ultra Repair Hyaluronic Acid Serum vs Haruharu Wonder Black Rice Hyaluronic Serum
66% overlapFirst Aid Beauty Ultra Repair Hyaluronic Acid Serum vs Neutrogena Rapid Wrinkle Repair Retinol Oil
66% overlapFirst Aid Beauty Ultra Repair Hyaluronic Acid Serum vs The Inkey List Hyaluronic Acid Serum
66% overlapGlow Recipe Watermelon Glow Niacinamide Dew Drops vs The Inkey List Niacinamide Serum
99% overlap

Want a deeper, personalised read? Drop both products into the live comparison tool for an ingredient-by-ingredient breakdown tuned to your skin profile.

Compare these yourself →