Peptides and lipids are the two powerful ingredients that make up SkinFix's gentle, but effective moisturizer. The lightweight lotion gives skin a smooth, radiant effect, plus strengthens the skin barrier to protect skin from aging free radical damage.

Buy it here for $38.

In the case of this Peter Thomas Roth moisturizer, more is better. It's formulated with 21 peptides that work to lift and firm the skin. Why is this ingredient the foundation of so many anti-aging products? Peptides are short chains of amino acids that make up the protein in the skin. Without enough protein, skin isn't as firm. When peptides are in these short chains, they can penetrate the top layer of the skin, to send signals to skin cells. To sum it up: Peptides can tell your skin cells to turnover, thus maintaining your skin's collagen production, which is crucial for a smooth, firm look.

Buy it here for $78.

Thanks to a blend of algae, rose, and mimosa, this cream hydrates, firms, and reduces wrinkles, plus evens out skin tone.

Buy it here for $89.

This French-favorite beauty brand's products are great for sensitive skin types, including it's retinol-based moisturizer. Retinol is an extremely effective anti-agining ingredient because it promotes skin cell turnover, but it's also notoriously irritating. Avène's cream is an exception because of the addition of the brand's signature soothing thermal spring water.

Buy it here for $70.

For instantly smoother, firmer skin, use a moisturizer with hyaluronic acid in it like this gel-cream from Neutrogena. The formula absorbs fast without any stickiness so it can be layered under makeup.

Buy it here for $17.

A clean option, this moisturizer has peptides and plant-derived stem cells that work to minimize fine lines, wrinkles, and moisturize skin.

Buy it here for $96.

This dermatologist-favorite moisturizer is also uber-affordable, too. RoC's hydrating cream contains retinol to help reduce deep-set wrinkles, along with SPF 30 to protect skin from UVA/UVB aging and vitamin A-induced sun sensitivity.

Buy it here for $18.