Medik8™ Intelligent Retinol

The three strengths represent a progressive retinol system. 3TR contains 0.3% retinol and is designed for beginners or those new to vitamin A. 6TR contains 0.6% retinol for those who have built comfortable tolerance with 3TR. 10TR contains 1% retinol for experienced retinol users seeking maximum anti-ageing results. All three share the same climbazole-boosted, Time-Release formula — the only difference is concentration. Medik8 recommends starting with 3TR and working your way up.

Intelligent Retinol is widely considered one of the most effective retinol serums available. The addition of climbazole — clinically proven to boost retinol activity — means you get enhanced anti-ageing results without the harsh side effects associated with many retinol products. Combined with Time-Release technology, nourishing squalane, and a choice of three strengths to suit every level, it delivers powerful results while keeping skin comfortable.

Climbazole is a breakthrough ingredient in vitamin A technology. When retinol is applied to skin, it converts to retinoic acid (the active form). Normally, enzymes break this down quickly, limiting its effects. Climbazole blocks those enzymes, allowing retinoic acid to remain active in the skin for longer. The result is supercharged retinol performance with less irritation — giving you more visible results from the same concentration.

Once you've been using your current strength every night comfortably for several weeks — with no redness, peeling, or sensitivity — your skin has likely built sufficient tolerance to step up. When moving to a higher strength, restart the phasing-in process: twice a week for two weeks, every other night for two weeks, then nightly. If you experience persistent irritation at a new strength, drop back down and try again in a few weeks.

Medik8 recommends following their CSA Philosophy — using Vitamin C and sunscreen in the morning, and Vitamin A (retinol) at night. Avoid layering retinol with other strong actives such as AHAs, BHAs, or benzoyl peroxide in the same routine, as this can increase the risk of irritation. If you want to use exfoliating acids, apply them on alternate evenings to your retinol.

Most users notice improvements in skin smoothness and radiance within the first few weeks of consistent use. More significant changes to fine lines, skin tone, and texture typically become visible after 8–12 weeks. Higher strengths may deliver faster results, but patience and consistency are key with all retinol products. Results are progressive, so continuing use over several months delivers the most noticeable transformation.

Yes. Retinol supports the skin's natural exfoliation cycle, helping to improve the appearance of uneven skin tone, dark spots, and post-inflammatory hyperpigmentation over time. The climbazole in this formula enhances these benefits by allowing retinol to work more effectively. Consistent nightly use, combined with daily SPF, will deliver the best results for brightening and evening out skin tone.

Intelligent Retinol uses retinol (vitamin A₁), which the skin converts to retinoic acid in two steps. Crystal Retinal uses retinaldehyde, which is one conversion step closer to retinoic acid, making it faster-acting. If you've reached the top of the Intelligent Retinol range (10TR) and want even more advanced results, Crystal Retinal is Medik8's next-generation vitamin A technology.

Retinol-based products, including all strengths of Intelligent Retinol, are not recommended during pregnancy or breastfeeding. Vitamin A derivatives can potentially affect foetal development, so it is best to avoid all retinol products during this time. Consult your doctor or midwife for safe skincare alternatives, or speak to one of Medik8's Skin Experts for pregnancy-safe recommendations.