iS Clinical Active Serum vs Pro-Heal Serum Advance+: Which One Do You Need?

iS Clinical Active Serum and Pro-Heal Serum Advance+ solve different problems: Active Serum is a botanical resurfacing treatment (willow bark, sugarcane, arbutin) used 2–3 times a week in the evening, while Pro-Heal Serum Advance+ is a Vitamin C and Retinol antioxidant serum for once-daily morning use. They can sit in the same routine rather than replacing each other.

At a glance: three ways these serums differ

Different actives, different purpose

Active Serum is iS Clinical's original treatment serum, built around willow bark (Salix Alba) extract, sugarcane extract and arbutin, with bilberry extract also listed. These are botanical, AHA/BHA-adjacent ingredients rather than a vitamin C formula, and the serum includes alcohol denat. and menthol, which give it a characteristic cooling or tingling sensation on application. It's positioned as a resurfacing treatment that helps improve the appearance of ageing, acne-prone, hyperpigmented and sun-damaged skin, not as a hydrating or brightening vitamin C step.

Pro-Heal Serum Advance+ is built around Ascorbic Acid (Vitamin C) and Retinol, alongside Zinc Sulfate and Arbutin, in a fragrance-free, water-based formula. The brand describes a time-release delivery technology (a manufacturer claim, not independently verified by Skintique) intended to support antioxidant coverage through the day. It's positioned for sensitive, compromised or blemish-prone skin that still needs an active antioxidant step but can't tolerate fragrance.

Frequency: a few evenings a week vs every morning

The two serums also sit at opposite ends of a routine's rhythm. Active Serum is used 2–3 times a week, or every other day, and the brand recommends new users start at twice a week and build up tolerance before increasing frequency. Pro-Heal Serum Advance+ is designed for once-daily use in the morning, worked into a routine alongside SPF rather than as an occasional treatment.

In practice this means Active Serum behaves more like an evening exfoliating step, while Pro-Heal Serum Advance+ behaves more like a daily antioxidant serum — the kind of product that sits under moisturiser and sunscreen every morning.

Pregnancy and nursing status

This is the clearest point of difference between the two. Pro-Heal Serum Advance+ carries the brand's own stated caution: consult your physician if you are pregnant, planning pregnancy, or nursing, reflecting its Retinol content. Active Serum's current product page does not carry equivalent pregnancy guidance either way, despite containing alcohol denat. and active botanical acids — we're flagging this as a data gap rather than assuming it's cleared for use.

If you're pregnant or breastfeeding, please contact our team for advice before use.

Can you use both in the same routine?

Because Active Serum is an evening, 2–3x-a-week step and Pro-Heal Serum Advance+ is a daily morning step, the two don't directly overlap in most routines. Some people use Pro-Heal Serum Advance+ every morning and layer Active Serum in on alternate evenings for extra resurfacing. If you're combining active ingredients for the first time, introduce one product at a time and watch how your skin responds before adding the second.

Which one do you need?

• Choose Active Serum if: you want a botanical resurfacing treatment for texture, ageing or hyperpigmentation, you're comfortable with a cooling/tingling sensation, and you're building an evening active routine.
• Choose Pro-Heal Serum Advance+ if: you want a daily fragrance-free Vitamin C and Retinol antioxidant serum, your skin is sensitive, compromised or post-procedure, and you want a straightforward once-a-day step.
• Consider both if: you want daily antioxidant coverage from Pro-Heal Serum Advance+ plus occasional evening resurfacing from Active Serum — introduce them one at a time.