If I incorporate antioxidants into my diet, do I need to apply them topically, too?

Yes. The antioxidants meant to be slathered on skin protect its surface from environmental assaults like pollution, smoke, and the sun, which contribute to the development of wrinkles, spots, and other signs of aging; ingesting antioxidants delivers them deeper into the skin. If you do both, you'll get anti-aging benefits for all layers of the skin. Consider adding vitamin C to your skin-care routine – it does double duty, fighting free radicals and stimulating collagen production. Try applying a serum in the morning, underneath your moisturiser and/or sunscreen. And, diet-wise, load up on brightly coloured berries: They're filled with anthocyanins, antioxidants that may help prevent collagen breakdown.

My skin is really dry. Is moisturising enough to fix it?

No. When you've reached the scaly, itchy stage, using lotion alone won't cut it. If you don't exfoliate first to get rid of that layer of dead skin, moisturiser won't penetrate. Just don't overdo it, or you may irritate your skin and make matters worse. Use a scrub once or twice a week (avoid salt-based ones, which can be drying), and then apply moisturiser immediately.

Will an over-the-counter brightening cream get rid of my dark spots?

No. A lightener or brightener can't fully eliminate spots (which are too deep in the skin), but it can fade them a lot, especially if they are newly formed. An in-office laser can eradicate spots, but even that method isn't foolproof: If you're not diligent about daily sunscreen afterward, that hyperpigmentation will come right back.

Are dark circles caused by lack of sleep?

No. Too little shut-eye can make them look worse, but they're influenced by multiple factors: how thick undereye fat pads are, how thin skin is, and how superficial blood vessels are. Hence, some people are likelier to have them than others. When you're tired, your blood vessels dilate and eyes get puffy, creating shadows. This makes dark circles more prominent, but it's not the cause.

How can I reduce the oil production in my skin?

Steer clear from using any harsh products to get rid of the oily skin. Wash your face twice a day with a gentle skin cleanser, use oil-free moisturiser and other skin products. Using home remedies can also help you to reduce the oil production. Also, pay attention to your diet, as increase in amount of sugar, salt and fried food can wreck your skin and lead to more oil production.