Medik8 Hydr8 B5 Travel Size - Liquid Rehydration Serum With Hyaluronic Acid - Replenishes, Smooths & Plumps Skin - Ideal For Normal to Sensitive Skin Types - 8ml vs Vichy Mineral 89 Hyaluronic Acid Hydrating Serum For All Skin Types, 50ml

Pros

• ✓Multi-molecular weight hyaluronic acid provides both immediate surface hydration and deeper-layer moisture retention
• ✓Fragrance-free and alcohol-free — well-tolerated by sensitive, reactive, and rosacea-prone skin
• ✓Lightweight, fast-absorbing texture that layers cleanly under moisturisers and makeup
• ✓Panthenol (B5) adds meaningful skin-repair and barrier-support benefits beyond HA alone

Cons

• ✗Travel size (8ml) has a significantly inflated cost-per-ml versus the full-size bottle
• ✗No antioxidant or active ingredients — requires companion products for anti-aging results
• ✗Hyaluronic acid can draw moisture from skin rather than atmosphere in very low-humidity environments if not sealed with a moisturiser
• ✗Isolated reports of tampered or opened packaging when purchased via third-party Amazon sellers

Best For

Pros

• ✓Lightweight gel texture absorbs quickly without greasiness — praised by both dry and oily skin users
• ✓Fragrance-free and fragrance-alcohol-free formula suitable for sensitive and reactive skin
• ✓Vichy Mineralizing Water provides mineral cofactors that support skin barrier function
• ✓Works well layered under heavier creams and even LED masks (no photosensitisation risk)

Cons

• ✗No confirmed INCI-listed active concentration — HA percentage and molecular weight breakdown are not disclosed
• ✗Primarily a hydration product; limited clinical actives for targeting pigmentation, wrinkles, or acne
• ✗Gel-gelling polymers (carbomer/xanthan type) may pill under certain sunscreens or silicone-heavy moisturisers
• ✗pH is close to neutral (~6.5–7), which limits its ability to act as a vehicle for low-pH actives like Vitamin C

Best For