How much weight may I lose after facelift without consequences?

Great Question! 
My answer is LOSE AS MUCH WEIGHT AS YOU CAN to reach your safe weight (your primary doctor can help you determine that). The facial drooping (if present) is the last thing for you to think of! The benefits of weight loss in health, quality of life, etc completely trump concerns of facial drooping. 
Even with facelift or another tightening procedure, losing the weight will still be way cheaper than keeping the weight on (increased medical bills, medications, etc)
I'm proud of you for entering the weight loss fight! Day by day you'll reach your goal!
Hope this helps and God Bless!

Dr. Robb

Thank you very much for your
question, as it is a good one. Small weight fluctuations will have little
consequence on the facelift results. If you lose more than 10-15 pounds, subtle
changes may be seen. A massive weight loss, however, may mean more visible
results; however this will depend on your skin elasticity and individual
situation.  If you have concerns about
the changes to your facelift results, I suggest consulting with a board
certified plastic surgeon. He/she will answer your questions and discuss your
treatment options.

Fullness in your face can be a hallmark of youth which is why we so often place fat grafts in faces to enhance fullness.  Be aware that too much weight loss is likely to decrease facial fat volume which can make you look older.  If you plan to lose a lot of weight you should do so before undergoing a facelift if  possible.

Facelifts in my practice are often done on heavy set women who i remove fat from the neck and face when I perform the facelift. Skinny women there is no issue. If a great deal of weight is lost more then 20% of current weight, there will probably be a consequence of a need for a secondary procedure if the result is unacceptable to you.

A small degree of weight loss may not have much effect but drastic weight loss is likely to result in loss of facial volume with a resulting degree of skin laxity. It is unclear from your question whether you have had a facelift already or whether you are contemplating a facelift since you may be in the process of losing weight. In the ideal world, in order to maintain a good result from facelift surgery,  it is best to defer surgery until you have lost weight. Weight loss in the face can be quite ageing due to the loss of volume. In these situations of hollowness in the face fat transfer combined with a facelift often provides the best results.

Seek out a board certified facial plastic surgeon with vast experience in facelift surgery and you will have your answer.  In an ideal world you will be advised to think about any degree of weight loss prior to the facelift, which in effect will allow you to maximize your fantastic facelift result.  If in fact you have recently undergone a facelift, and then are considering weight loss-all is not lost.  Take the plunge with your weight, see how you look-if indeed facial volumes deplete and skin laxity occurs to a noticeable extent-revisit your fabulous surgeon and tell him your story.  He may be able to easily tighten things up with what I call a stretch back facelift-minimal intervention with considerable facial skin tightening and rejuvenation.  Explore options with your surgeon-or plan for weight loss prior to the facelift-good luck to you in your quest !!

The advice I give to my patients regarding weight changes and a facelift is this: whether you plan to lose or gain weight, get to the weight you are comfortable with before having surgery.  Many factors come into play, but in general, any weight changes (gain or loss) of more than 10 pounds can effect the overall result of your facelift.
As importantly, weight fluctuations can also significantly reduce the longevity of your facelift.  The result will not last as many years with someone who has significant weight changes.
Best of luck!

How much weight you can lose AFTER you facelift depends upon your age, weight (facial fullness) and the elasticity of your skin.  Generally, in my patients that want to lose weight, I take photos and recommend they return for examination when they get between 10 and 15 pounds of their intended weight loss.  We can then compare photos and determine the extent of facial deterioration and decide the timing of the lift.  Most often, getting within 5-10 pounds is preferred for lasting results.  However, with good elasticity the skin is more resilient and in that case the face will tolerate more post lift weight loss.Additionally, I nearly always use fat and/or fillers to replace areas of extensive fat loss/atrophy using old patient photographs to determine where the filling will be needed.  This allows for more liberal rules surrounding weight loss and more lasting and natural results.

It is usually best to do your facelift after any major weight loss of more than 10-15 lbs. Anything less than10 lbs will probably not cause a noticeable difference.  

I don't think it would matter at all, unless the weight loss is massive, like forty pounds. Losing five or ten pounds should be inconsequential.Talmage Raine MD