ReNu Smoothing Shampoo (Singapore)

ReNu Smoothing Shampoo is an anti-frizz cleanser formulated for thick, coarse, or frizzy hair that fights humidity-induced flyaways from the first wash step. In Singapore — where outdoor humidity sits between 80% and 95% on any given day — frizz is not an occasional problem, it is a constant one. This shampoo addresses it at the cleansing stage rather than relying solely on post-wash products. At S$53 for 250 ml, it provides 6–8 weeks of daily washing for medium-length hair.

What Makes ReNu Smoothing Shampoo Different

Most anti-frizz shampoos work by coating the hair in silicones that temporarily smooth the cuticle. The problem with that approach in a tropical climate is buildup — silicone residue accumulates with daily washing, making hair progressively heavier, duller, and harder to style over 2–3 weeks. ReNu Smoothing Shampoo uses a lighter smoothing complex that tames the cuticle without excessive silicone layering, so it remains effective over weeks of consistent use without requiring a clarifying reset.

The indoor-outdoor humidity cycle in Singapore makes frizz control especially difficult. You leave an air-conditioned office at 22°C and 45% humidity, step into 33°C and 90% humidity, and the moisture differential causes the hair cuticle to swell within minutes. Smoothing Shampoo deposits a protective conditioning layer during washing that helps resist that rapid cuticle expansion — not eliminating it entirely, but reducing the severity enough that hair holds its shape for 4–6 hours between styling sessions.

Key Ingredients

Coconut Oil Derivatives provide natural smoothing action through medium-chain fatty acids that penetrate the cortex rather than sitting on top of the strand. This internal conditioning approach means the smoothing effect survives humidity exposure better than surface-only coatings — the protection is inside the strand, not just on it.

Panthenol (Pro-Vitamin B5) binds moisture within the hair shaft, reducing the strand’s tendency to absorb excess atmospheric moisture — the primary mechanism behind humidity frizz. When the internal moisture content is balanced, the cuticle has less reason to swell and lift. Glycerin acts as a humectant at moderate concentrations, maintaining hydration without creating the sticky, heavy feel that high-glycerin formulas can cause in tropical humidity.

How to Use

Apply to wet hair, focusing on the mid-lengths and ends where frizz typically starts. Massage into a lather and leave on for 60–90 seconds — slightly longer than a standard shampoo — to allow the smoothing agents time to deposit on the cuticle. Rinse with lukewarm water; hot water opens the cuticle further and works against frizz control.

For mornings when you are heading from an air-conditioned bedroom directly into outdoor humidity — the standard experience walking to an MRT station or waiting at a bus stop along Orchard Road — pair the shampoo with ReNu Smoothing Conditioner for a doubled smoothing effect. On days when you are staying indoors in air-conditioning, the shampoo alone may provide sufficient control.

Frequently Asked Questions

How is this shipped in Singapore?
All orders ship from the official Nu Skin Singapore warehouse. Standard delivery is S$4.99, or free on orders over S$99. Delivery takes 1–3 business days islandwide.

Will this weigh my hair down?
The formula is designed for thick and coarse hair, so it has a richer profile than volumizing shampoos. If your hair is fine but frizzy, use a smaller amount (5-cent coin size) and focus application on mid-lengths to ends, avoiding the roots.

Does it work on chemically straightened hair?
Yes. For rebonded or keratin-treated hair, this shampoo helps maintain the smooth finish between salon appointments. It is sulphate-free in its surfactant approach, so it will not strip keratin treatments prematurely.

Can it handle Singapore’s humidity?
No shampoo alone can fully eliminate frizz in 90% humidity. Smoothing Shampoo reduces the severity and delays the onset — expect 4–6 hours of controlled frizz rather than all-day perfection. Pairing with the Smoothing Conditioner extends this further.

How long does one bottle last?
A 250 ml bottle provides approximately 6–8 weeks of daily use for shoulder-to-mid-back length hair.

Important Information

Important Information: For external use only. Avoid contact with eyes. If irritation occurs, discontinue use and rinse thoroughly. Individual results may vary based on hair type and consistent use. Store in a cool, dry place away from direct sunlight.

NuBest Skin is an Independent Nu Skin Brand Affiliate. This content is not produced or endorsed by Nu Skin Enterprises Inc.

Sources & References

Product information sourced from official Nu Skin product documentation (2024–2025). Humidity and temperature data for Singapore sourced from the Meteorological Service Singapore (MSS) climate records. Frizz mechanism data referenced from cosmetic chemistry literature on cuticle behaviour in high-humidity environments.

Reviewed by the NuBest Skin Editorial Team. Last updated: April 2026.