Niacinamide has had a strange few years. Once a quiet supporting ingredient used at 2 to 5 percent, it became a headline act, and brands began competing on concentration: 10 percent, then 15, then 20. Derma Factory's Niacin Hyaluronic Acid 21% Serum is a product of that race, pairing 20 percent niacinamide with 1 percent hydrolyzed hyaluronic acid. It is worth asking both what the high dose delivers and what the added hyaluronic acid changes.
The ingredient list is short and transparent. Rose flower water forms the base, followed by niacinamide at a declared 20 percent, glycerin, butylene glycol, 1,2-hexanediol and hydrolyzed sodium hyaluronate at 1 percent. A small amount of thickener, a pH adjuster, a chelator and a little water complete the formula. There is no fragrance, alcohol, oil or silicone. If you have used the brand's Niacinamide 20% Serum, this will look familiar: the formulas are essentially identical, with the hyaluronic acid as the only meaningful addition, and the bottle is larger.
What does 20 percent niacinamide actually do? The best-established benefits of niacinamide, improved barrier function, reduced redness, more even tone, less visible hyperpigmentation and some reduction in oiliness, were demonstrated largely at 2 to 5 percent. Higher concentrations may modestly increase oil control and the look of pores, which explains their popularity among oily-skinned users. But there is little evidence that 20 percent is four times as effective as 5 percent, and higher doses are more likely to cause flushing, warmth or tingling, particularly in sensitive skin. The honest summary is that 20 percent is a strong, oil-focused choice, not a universally better one.
The 1 percent hydrolyzed hyaluronic acid is where this serum distinguishes itself. Hydrolyzed hyaluronic acid has a lower molecular weight than standard sodium hyaluronate, which helps it sit in the upper layers of the stratum corneum and bind water. In a formula this concentrated in niacinamide, that extra hydration helps offset some of the tightness or dryness that high-dose niacinamide can cause. Together with glycerin and rose water, it makes this serum more comfortable than a plain high-strength niacinamide serum.
In use, the serum is a light gel that spreads easily and dries to a smooth, faintly silky finish. Oily skin often notices less shine within days, and makeup may sit better over the T-zone. A small amount goes a long way; overapplying can cause pilling, especially under silicone-heavy sunscreens. One pump for the whole face is usually enough.
The serum works well alongside other oil-control and acne ingredients. Paired with salicylic acid or azelaic acid, it can form a straightforward routine for oily, congested skin. It should not be layered with other niacinamide products, since that multiplies the dose and the risk of irritation. Anyone using several products should check labels, as niacinamide appears in many moisturizers and sunscreens.
For sensitive, rosacea-prone or dry skin, a lower-strength niacinamide serum is often a better choice. If you want to try this one, start every other day and increase slowly. Redness or small bumps after starting niacinamide are usually irritation rather than purging, since niacinamide does not speed up cell turnover, and they are a signal to reduce frequency.
Seasonality matters with a serum like this. In hot, humid months, when oily skin produces the most sebum, a concentrated niacinamide step can make a noticeable difference to how long a matte finish lasts. In cold, dry months, the same skin may tolerate less, and switching to once daily, or pairing it with a richer moisturizer, can prevent the tight, slightly stingy feeling that high-dose niacinamide sometimes brings when the barrier is under winter stress. Treating the dose as adjustable rather than fixed is the key to getting along with it long term.
There is also the question of whether the added hyaluronic acid justifies choosing this version over the brand's plain 20 percent serum. For oily skin that already feels comfortable, the difference is modest. For combination skin, or anyone who found the plain version slightly drying, the extra hydration is a genuine improvement, and the larger bottle makes the per-millilitre price better too. If you are buying for the first time, this hyaluronic variant is the more forgiving choice of the two.
Where it fits in a routine is also straightforward. For oily, acne-prone skin, a sensible pairing is this serum in the morning under a light gel moisturizer and sunscreen, and a salicylic acid or azelaic acid treatment at night. That covers oil control, pore appearance, post-acne marks and gentle exfoliation without piling up irritating ingredients. Adding a retinoid later, once the skin has adjusted, is usually well tolerated alongside niacinamide.
The large 80ml bottle is a real plus. Most treatment serums come in 30ml, and at one to two pumps daily, this bottle can last three to four months. That makes the price per millilitre very low.
Verified reviews specific to this hyaluronic acid version are limited, although the brand's 20 percent niacinamide formula has a larger following. The available feedback praises the oil control, hydration and bottle size, and notes redness in some users, which matches expectations for a 20 percent niacinamide product.
On value, around twenty-two dollars for 80ml is excellent, working out to well under a dollar per week of use. For oily and combination skin that wants a strong, simple niacinamide serum with a hydrating boost, it is easy to recommend. For sensitive, rosacea-prone or dry skin, the concentration is likely more than necessary, and a gentler formula will deliver most of the benefits with less risk.
