What I've discovered is that, with sufficient hydration, my skin tends to sort itself out. Excepting the arid winter months, I've become less drier and sensitive than before. (Incorporating niacinamide, with its barrier-repairing, ceramide-production inducing, photocarcinogenesis-inhibiting, melanin-formation-suppressing, anti-inflammatory, etcetera functions, has also helped enormously.) It may take a lot of layering to get there, but 7Skin works. Dehydration is better addressed by several light layers than a single heavy one, though I've never found it necessary to go full seven layers. Additionally, it opens up the possibility of maximizing the first product in your routine. Not only is it the first layer, in full and direct contact with the skin, it's also a product you use in high amounts, so theoretically it's possible to read specific benefits by simply changing formulas.
This has sparked an odyssey for my perfect 7Skin toner, as the Hanyul is not ideal. The texture is too thick and serum-like, and becomes quite sticky when layered, plus it features alcohol rather high up on the ingredients list. On the other hand, the combination of niacinamide, ferments, and humectants is effective at brightening and keeping the skin hydrated. Like any good first essence, it immediately perks up dull, tired-looking skin.
- INGREDIENTS (2017 FORMULATION) water, alcohol, PEG/PPG-16/6 copolymer, glycereth-26, butylene glycol, niacinamide, monascus/rice ferment, lactobacillus/soybean ferment extract, saccharomyces/barley seed ferment filtrate, sodium hyaluronate, angelica acutiloba root extract, cnidium officinale root extract, soybean seed extract, glycerin, glyceryl polymethacrylate, dextrin, bis-PEG-18 methyl ether dimethyl silane, adenosine, ethylhexylglycerin, carbomer, theobroma cacao extract, tromethamine, PPG-13-decyltetradeceth-24, disodium EDTA, phenoxyethanol, fragrance

These are the products I'd categorize as "niacinamide/ferments-based brightening first essences".
I've accumulated far more: for calming irritation, hydration only, ceramide-based. -_-'
This is just the beginning. I've got a dozen or so products for the purposes of experimentation and review. Considering the popularity of the 7Skin Method, I have to imagine it has proved equally effective for others when dealing with dehydration, and just as tricky finding the right toner for the job. Hopefully I'll find something that answers this burning desire for the perfectly layerable, brightening, hydrating, soothing, but not-too-pricey-and-hard-to-get water-based solution.
AFTERTHOUGHTS
- HANYUL Rice Essential Skin Softener
- PROS: Accessibility and price point (within Korea). Aesthetics are a non-issue. Multiple ferments; brightens well. In spite of the alcohol, I find it hydrating and not drying; likely the alcohol was deemed necessary to cut through the humectants and fermented rice extract.
- CONS: Texture is thick, and becomes sticky after one layer. Alcohol. Fragrance.
- UNIQUE FEATURES: Jeon JiHyun sparked a craze for this product. It's the jack-of-all-trades, master-of-none product so far in my search for the ideal 7Skin Toner.
DETAILS
Hanyul is 150mL for $35, available at Aritaum, 200mL for ₩37,000, but I frequently find it on sale.