Edward Buckingham

It is true that your collagen production is reduced as you age.  It is also reduced in total due to breakdown exceeding production.  There are also changes in elastic fibers.  All of these natural intrinsic changes are combined with extrinsic changes ie. sun damage to produce wrinkles, discoloration and other age related changes.  

The only topical product shown to improve collagen on a microscopic level and therefore wrinkles is retin-A.  This can be obtained by prescription or in some skin care lines. 

Other topical products that can help skin are also available, but none has been shown to improve collagen on a scientific level.  The other important topical is sunscreen.  Minimizing the extrinsic damage will sustain you skin over time. 

Beyond that you are looking at some sort of medical/surgical intervention that can be anywhere from hyaluronic acid injections, (better than collagen) to fractionated lasers to ablative skin resurfacing.  All of which can be used to build up and remodel damaged and reduced collagen.