People with chemically processed (coloured, permed, relaxed) or sun-damaged hair who want a lightweight finishing product to smooth frizz and add shine, and who also want a product that doubles as a quick skin-shine serum. Cynos is a professional-line Canadian brand distributed mainly through salons and pro-beauty retailers, so it suits both salon clients and stylists.

Its differentiator is dual hair-and-body use in one lightweight, silicone-based formula that gives an immediate smoothing and shine finish to chemically treated or sun-damaged hair without a rinse step, making it a quick finishing product rather than a leave-in treatment you have to plan around.

Apply an appropriate amount to dry or damaged hair, focusing on mid-lengths and ends, then style as usual. Can also be massaged onto clean skin. Avoid eye contact; rinse immediately if contact occurs.

Pros:

• Lightweight, fast-absorbing finish suitable for both hair and skin
• Silicone-based smoothing helps reduce frizz and porosity on damaged or sun-exposed hair
• Simple one-step application before styling, no rinsing required

Cons:

• Primarily a surface-smoothing serum, not a protein or bond-repair treatment for deeper damage
• Contains fragrance and a synthetic colorant, a possible sensitivity concern for reactive skin
• Official brand documentation (ingredient detail, clinical/usage data) is limited since Cynos is a smaller niche brand