there is no collagen product that when applied to the skin will penetrate and remain as intact collagen. the molecule is simply too large. however topical collagen can be a really good moisturizer. there are ingredients such as peptides and other antioxidants that can help stimulate collagen production. the effect won't be the same as having a soft tissue filler such as collagen or hyaluronic acid injected into the skin but they can help soften fine lines and wrinkles. the gold standard best product for brightening the skin is hydroquinone. other ingredients such as glutathione sepi-white n-acetyl glucosamine licorice root extract mulberry root extract and azeleic acid can also be helpful. there is no collagen pill that has been shown in proper studies to grow collagen. i do recommend a multivitamin daily omega-3 and vitamin d supplements always under the guidance of your physician.
is collagen iv an effective anti-aging product? is gluthathione iv good for skin whitening? what about a collagen pill?