Isa Knox Prime

"Double Effect" is the core formula principle of the Age Focus Prime sub-line. Each Double Effect product delivers two distinct treatment actions in one formula: typically a fast-acting surface component that shows visible results quickly, paired with a deeper-acting ingredient that builds effect over weeks of consistent use. This dual approach addresses both the short-term desire for visible improvement and the long-term requirement for structural skin change.

In the Double Effect Ampoule, this typically means a combination of an immediately smoothing ingredient (like hyaluronic acid or a peptide) alongside a longer-term cell-renewal active (like adenosine or a ferment filtrate). The Double Effect Emulsion and IPHONEOL Cream carry the same dual-action formula philosophy through the lotion and cream steps of the routine, so the effect compounds across each layer.

The Double Effect Ampoule is the core treatment step in the Prime routine. It is available in a set of 2 and a set of 3 (Three), making it the most value-optimized product in the Prime line for regular users. Ampoules are applied after the emulsion in a Korean routine - a few drops pressed into the skin before the cream step. The concentrated formula means a small amount per application is effective; the 2-set and 3-set formats provide two to three months of daily use per set.

The set format is the standard purchase for Prime Ampoule users. Single bottles are not listed in this grid - the multi-unit sets are the default offering. The 3-set (Three) is the better per-unit value if you use the ampoule daily; the 2-set is the right choice if you want a smaller upfront commitment.

The Double Effect Emulsion 160ml is the lotion step in the Prime routine - applied after the toner and before the ampoule. At 160ml it is a full daily-use bottle, lasting approximately two to three months at twice-daily application. The emulsion step in Korean skincare is the hydration-conditioning layer that prepares the skin surface for the more concentrated treatment steps that follow.

In the context of the Prime Double Effect system, the Emulsion carries a lighter version of the same dual-action formula present in the Ampoule - it functions as a preparatory Prime layer so the Ampoule's actives have a better-primed surface to work on. Skipping the Emulsion and going directly from toner to Ampoule is possible but less effective than using the full layered system.

The IPHONEOL Cream 50ml is the cream step in the Prime Double Effect routine. "IPHONEOL" is a formula designation within ISA KNOX's Prime naming system - it differs from the IPHOOL Cream by one letter, which likely indicates a distinct formula variant at the same Prime tier. Both are 50ml cream formats at the end of the routine. The IPHONEOL Cream seals in all the Prime Double Effect layers applied before it - toner, emulsion, ampoule - and provides an occlusive barrier for overnight repair.

For maximum Prime routine intensity, use the IPHONEOL Cream at night when the skin's repair cycle is most active. In the morning, a lighter cream with sunscreen on top is typically preferred; the IPHONEOL Cream can be used morning and night for very dry or mature skin that needs all-day barrier support.

The Prime Wrinkle Fool Serum 50ml is a standalone serum-step product within the Prime line. "Wrinkle Fool" is a product name rather than a description - it does not mean the serum fools wrinkles in a literal sense; it is IPKN's product line name for this specific formula. At 50ml it is a full-size serum format suited for twice-daily use over two to three months. The Prime designation means the Wrinkle Fool Serum operates at the highest active concentration in the ISA KNOX serum range.

In a complete Prime routine, the serum step sits between the Double Effect Emulsion and the Double Effect Ampoule: Emulsion → Serum → Ampoule. For a leaner Prime routine, the serum can replace the ampoule as the single treatment step, using the larger 50ml size as the primary anti-aging treatment step. The Special Offer listing for this product indicates a promotional pricing format on skinsli.

The Izanox Age Focus Prime Ampoule Serum 50ml is labeled with the Korean pronunciation of ISA KNOX (아이자녹스 → Izanox) rather than the English brand name. This is the same manufacturer - ISA KNOX by LG Household and Health Care - and the same line. The Korean-market label variant is common in Korean skincare sold through international channels like skinsli. At 50ml this is a larger ampoule-serum format - bigger than a standard ampoule but positioned as a concentrated treatment. It suits users who want ampoule-strength actives in a serum-volume format.

A full Age Focus Prime morning routine: Age Focus Vital Collagen Essential Skin toner (from the broader Age Focus range) → Age Focus Prime Double Effect Emulsion 160ml → Prime Wrinkle Fool Serum 50ml (optional) → Age Focus Prime Double Effect Ampoule (from Set of 2 or 3) → Age Focus Prime Double Effect IPHONEOL Cream 50ml → sunscreen. Evening: same without sunscreen, substituting the Wrinkle Focus Eye Cream for the orbital area as a last step.

For the highest intensity, all steps use Prime products and the Wrinkle Fool Serum is added between the Emulsion and Ampoule. For a more streamlined Prime routine, the Emulsion → Ampoule → Cream three-step is the core. The planning sets (IPHOOL Cream Planning, Prime Double Effect IPHOL Cream Special Planning) bundle the cream with companion products for lower combined entry prices.