Round Lab Soybean Nourishing Serum: What to Know Before You Buy
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Fermented ingredients, ceramides and peptides are three of the words you see most on Korean serum labels, and Round Lab's Soybean Nourishing Serum puts all three in one bottle. Here is what to know before you order.
What Round Lab says about it
According to Round Lab, this is a nourishing serum made with seven types of vitamin B ingredients, obtained by fermenting lactobacillus derived from soymilk together with soymilk ferment filtrate. The brand says it is designed to keep skin moist and lively.
The ingredients Round Lab highlights:
- Black soybean extract from soybeans grown in Jeongseon, Korea, which Round Lab says provides deep nourishment to dry skin.
- Five types of ceramides (Ceramide NP, NS, AP, AS and EOP), which the brand describes as a moisture barrier that helps dry skin stay moisturized for a long time.
- Peptides, which Round Lab says help leave skin feeling elastic and smooth.
- Moisturizing capsules that, according to the brand, melt into the skin on contact.
The active ingredient list also includes glycerin, squalane and niacinamide, and the full list includes panthenol. Round Lab adds that the formula is designed to stay close to the skin's natural pH to help keep its oil and water balance.
- Texture: slightly oily and watery
- Scent: unscented
- Skin types listed: dry and normal skin, and skin concerned about fine lines
- Size: 1.7 fl. oz (50ml)
Where it fits in a routine
Round Lab's directions are simple: after toner, take an appropriate amount and let it absorb all over your face. In the usual order of cleanse → toner → serum → cream → sunscreen, it sits in the serum slot.
- Morning: cleanser, toner, a small amount of this serum, a moisturizer, then sunscreen as the last step.
- Night: cleanser, toner, serum, then a cream.
Because the texture is described as slightly oily, start with a little and see how it sits under your moisturizer before adding more.
Who it might suit
Going by Round Lab's own description, this serum is aimed at dry and normal skin, and at people who want a nourishing step with ceramides and peptides. It belongs to Round Lab's Soybean range, which the brand positions around the skin barrier. Oily and combination skin are not on its list, so if you get shiny easily, a lighter serum may be a better first try.
For K-pop fans curious about the fermented-ingredient trend in Korean skincare, this is an easy way to see what it is about.
What to check before you buy
- Price: listed at $31.00 on Round Lab's US store at the time of writing. Check the current price on the brand page, as prices and promotions change.
- Shipping: confirm that Round Lab's US store ships to your country, and what shipping and any import fees will cost.
- Allergies: the formula contains soybean-derived and fermented ingredients, plus cocoa seed extract and corn starch. If you react to any of these, read the full ingredient list first.
- Patch test: try a small amount on your inner arm or jawline for a few days before applying it to your whole face.
Our take
On paper, the Soybean Nourishing Serum is a focused option for dry or normal skin: five ceramides, peptides, black soybean extract and fermented vitamin B ingredients in an unscented 50ml bottle at a mid-range price. If your current routine feels light on moisture, it is worth a look as the serum step before your cream. Patch test first.
See Soybean Nourishing Serum at Round Lab →
Information is based on Round Lab's product page as collected by KPOPORO. Details can change; please confirm on the brand page before buying.