Medik8's Daily Radiance Vitamin C cream is popular among skincare fans, and we've found a way to get 20% off the best-selling product right now. 

The cream, which promises to help with hydration, radiance and UV protection, has been reduced to £47.20 at Space NK saving £11.80, as part of a '20% off almost everything offer' online. You can also buy the cream at full price from Lookfantastic or Medik8, but it will cost you £59 without the discount. 

The moisturiser has collected over 1,000 reviews on Space NK, with a high 4.7 star rating overall. One skincare fan commented: ''I have gone from having dull-looking and blotchy skin to having radiant, glowing, healthy-looking skin in weeks since using this product. [I] rarely wear makeup now, [this] definitely makes me look more youthful. Highly recommend.'' [SIC]

Dermatologists usually recommend using SPF all-year-round. They often advise on a separate sunscreen, even if the moisturiser has some sun protection. The Medik8 moisturiser has SPF30 in the formula, and it's down to the individual as to whether they use additional suncare. 

One reviewer vouched for the UV-protecting formula, saying: ''Having the peace of mind that SPF is built-in is also a bonus. I switched from Elemis to Medik8 and don't regret it at all."

SPF isn't the only benefit of the cream, as vitamin C is the ingredient that helps with radiance and brightness. Dr Thuva Amuthan, dermatology doctor and founder of Dr. Derme Skin Clinics, says: "Vitamin C evens-out skin tone and supports collagen production, making skin look more youthful and radiant.'' It's essentially an antioxidant, and is meant to be suitable for all skin types.

The cream also has hyaluronic acid, which draws moisture into the upper layers of the skin, keeping the complexion supple and hydrated.

As Medik8 is a premium brand, it's always great to stock up on the products when they're discounted, so if you're looking for a new SPF for spring, you can get 20% off the Medik8 Daily Radiance cream now.

To really protect your skin, according to Dr Thuva, a ''dedicated broad-spectrum sunscreen with at least SPF 50 on top of your SPF moisturiser is advisable for optimal protection''. He also says that most people don't apply enough, but ''using a higher SPF can compensate''.

Therefore, to be sure your skin is safely shielded from harmful UV rays, you should use a moisturiser with SPF, followed by an SPF 50 sunscreen.

As we age, our skin gets thinner, which means it's more fragile and 'more susceptible to UV damage and skin cancer' , says Dr Thuva, so SPF is important to use daily to protect against both.

If you have sensitive or red skin conditions you may also be at higher risk, but if you 'reapply every two hours', you can ensure your skin is protected. 

That being said, all age groups and skin types should use SPF 50 on a daily basis, regardless of the time of year.

If you're looking for a sunscreen to wear over your SPF moisturiser for even more protection, the COSRX Daily Vitamin E Vitalizing Sunscreen is £19 on Amazon, and it has SPF 50. Vitamin E is the other main ingredient, which goes deeper than the surface level of the skin, to strengthen the skin barrier, but it has also been known to improve wrinkles.

Alternatively, the Ultra Violette Supreme Screen is very highly rated on Boots. It's now in a premium beauty deal, reducing it from £34 to £28.90. The sun screen has been fomulated to work as a primer underneath make-up, igving a smooth base with SPF 50 protection.