Retinal / Retinaldehyde – 0.05%
One of the defining Vitamin A actives within NTRYMED Retinoid Serum.
Retinal — also known as Retinaldehyde — is a retinoid positioned between Retinol and Retinoic Acid within the Vitamin A conversion pathway.
It supports:
Epidermal renewal + smoother texture + fine-line improvement + clearer-looking skin + more even-looking tone.
NTRYMED currently specifies a 0.05% Retinaldehyde concentration within the serum.
Hydroxypinacolone Retinoate / HPR
The second retinoid within the formula.
HPR is an advanced Vitamin A derivative used to support healthy skin renewal and improve visible signs of ageing.
It complements Retinal within NTRYMED's dual-retinoid system.
HPR should not be confused with conventional Retinol.
Ascorbyl Glucoside
A stabilised Vitamin C derivative providing antioxidant and brightening support.
It helps defend against environmental oxidative stress while supporting a more luminous and even-looking complexion.
Sodium Hyaluronate
A form of Hyaluronic Acid that attracts and retains water within the skin.
It helps support:
Hydration + suppleness + visible plumping + skin comfort.
Squalane
A lightweight, skin-compatible emollient that helps soften the skin and support the lipid barrier.
Its presence is particularly useful in a retinoid formula where maintaining barrier comfort is important.
Vitamin E / Tocopheryl Acetate
Provides complementary antioxidant and skin-conditioning support.
It works alongside Vitamin C to strengthen the formula's broader antioxidant profile.
Glycerin + Butylene Glycol
Humectants that help attract moisture and support hydration.
Phospholipids
Skin-conditioning lipid components that help support the serum's delivery system and overall skin feel.

For the clearest and most conservative home-care routine, use in the evening.
Apply to thoroughly cleansed, dry skin.
Dispense a small amount over the:
Face + Neck
and gently massage until completely absorbed.
Follow with an appropriate moisturiser.
If You Are New to Retinoids
Introduce progressively:
Weeks 1–2: Every third evening
Weeks 3–4: Every second evening
Thereafter: Increase toward nightly use if comfortably tolerated
If sensitivity develops, stop use until the skin has recovered, then restart at a lower frequency.
Do not force nightly application if your skin is showing persistent irritation.
Every morning, finish with a broad-spectrum SPF 30–50+, with SPF 50+ preferred within an active retinoid routine.

Fine lines and wrinkles
Premature signs of ageing
Mature or photoaged skin
Uneven or rough skin texture
Dull or lacklustre skin
Hyperpigmentation
Post-blemish marks
Uneven-looking skin tone
Congestion-prone skin
Blemish-prone skin
Combination skin
Oily skin
Dry or dehydrated skin requiring active renewal
Clients wanting an advanced Vitamin A treatment
Clients ready to introduce a structured retinoid routine
Highly sensitive or reactive skin should introduce the serum slowly according to tolerance.