You can find forehead fillers by the dozen these days.
More are coming on the market all the time.
Thousands of people in the skin care business -- surgeons, dermatologists and others -- will gladly inject you with any of them.
Many will tell you the cause of skin lines: Loss of collagen, elastin and hyaluronic acid.
A second cause: You've been expressing your emotions.
"Too much animation," says one site that plans to "train" you to stop this -- by injecting you with chemicals and fats.
Here is why your own natural, well-nourished skin is a better forehead filler.
About forehead fillers I'll mention just a few issues with injected forehead fillers.

• Cost: You'll hear the word "affordable" on some of the sites advertising forehead fillers.
  Generally speaking, that means the charges begin at hundreds of dollars and range well into the thousands.
  By "affordable" they seem to mean it costs less than paying for a plastic surgeon, an anesthesiologist and an operating room.
  
• Side effects: Drooping eyebrows and eyelids, and unnatural clumping and lumps under the skin are two common ones.
  Notice that the experts disagree on what is safe and effective.
  How secure does that make you feel?
• Lack of common sense: Since all these treatments have risks, you might expect professionals would only give them to people who clearly can use some help.
  But it took me about five minutes to find a site proudly showing off its "before and after" photos of a pretty 24-year-old woman with lovely skin.
  After a fat injection, she looked exactly like -- surprise -- a pretty 24-year-old woman with lovely skin.
  
• Covering up the symptoms: One reason health care is so expensive in developed countries is that we're always looking for a drug or chemical to take care of any symptom.
  We never seem interested in reversing the cause of these symptoms.
  

How to reverse the cause of forehead lines You can pay somebody to give you an injection so you can't move your forehead muscles.
They will be glad to do this every few months for the rest of your life.
If you can be "trained" never to show surprise, or joy, or to frown or smile, that could help do the trick, too.
Or you can give your forehead, and your whole face and neck, the nourishment it needs.
Allow your skin to replace the lost collagen, elastin and hyaluronan that cause skin aging.
All the experts agree on these causes of skin aging, which makes skin sag and develop lines and wrinkles.
You rarely get told how to reverse those causes.
Here is how to do that.
Use a skin cream with modern, nature-based, nourishing ingredients.
I'll name two.
All the results mentioned below have been reported in clinical trials.
-- Cynergy TK stimulates natural collagen and elastin production in the skin.
It increases skin cell growth by 160 percent, and improves skin elasticity by 42 percent over just 18 days.
-- Phytessence Wakame is an extract of seaweed that helps your skin rebuild hyaluronan levels to those of a much younger person.
It works by blocking the enzyme that destroys hyaluronan in the skin.
Those are two excellent ingredients in a skin cream that builds healthier skin, fades and gradually fills in lines, and tightens sagging skin.
Your skin gets better and better as time passes.
I believe the results are far better than any forehead fillers you can buy.