Vish Banthia, MD

In general and depending upon the degree of jowling, the optimal ways to improve the jowl area involves a combo of a facelift procedure, gentle jowl liposuction, and potentially the placement of a chin implant that adds volume to the pre-jowl area.  In your case, I would find out what type of chin implant you had placed  - perhaps a chin implant that addresses the prejowl area might help.  Additionally (and assuming that you wanted a more minimally invasive option), one might consider placing a thread lift (or 2) in an appropriate vector and position that might lift the jowls.

Radiesse and voluma work well in the chin area and have reasonable longevity - an experienced injector can place in the lateral portions of chin area to achieve a more proportional appearance.  If you like the look after placing the fillers, down the line you might consider a chin implant if you want a more permanent solution (along with removal of the liquid silicone).

Based upon the photo, it seems as if your filler may still persist and your lips look like they have good volume (although it could be that the photo is too much of a close-up pic) -- typically, Juvederm lasts anywhere from 4-9 months from my experience.  It's best to wait until the filler has resorbed so that the surgeon will know how much fat to inject.  One thing to note, however: like most things in life, fat may not last forever...fat also resorbs but may last longer (in appearance) than fillers.

No -- it would be incorrect to assume that drinking collagen drinks can have the same effects as a botox treatment.

That being said, there are healthy lifestyle habits and dietary changes that one can make to promote healthy, bright, and youthful skin.  For example, too much direct sunlight exposures / lack of sleep / smoking / exposures to pollution -- all contribute to aging skin in a faster way.  Lots of skin health tips can be found on a variety of resources including zendybeauty.com, webmd, asps, and other sites with a lot of educational materials.

Too much of a good thing can be a bad thing at times -- and this can apply to Botox as well.  Too much botox can cause seepage into certain eyelid muscles to cause an eyelid droop (or ptosis) which is temporary and potentially treatable with eyedrops.  But this is (and should be) very rare.

To properly answer your question, it would be necessary to understand where on the forehead you had injections -- in general, you can get injections in the glabellar area between the brows and the forehead at standard amounts (usually 15-20 units or slightly more).  In addition, many injectors can inject at the tail end of the brow (or at the peak of the brow) in very small amounts to establish a refined, polished browlift of about 1-2mm most of the time.

Ultimately, proper injection sites and proper botox amounts are key to getting the best results -- one not need to stop injecting in certain areas on the forehead based upon the information you have provided in your question.