Several natural skin care products have proven effective for aging skin. Vitamin C serum is one of the most popular and effective natural ingredients, thanks to its ability to stimulate collagen production and reduce the appearance of fine lines and wrinkles. Other effective natural ingredients for aging skin include: Hyaluronic acid. Natural oils like argan oil. Botanical extracts like green tea and chamomile. What sets these best natural skin care products for aging skin apart from other products on the market is their ability to nourish and protect the skin without using harsh chemicals or synthetic ingredients.