How soon can you go back to exercise and normal diet after a face fat transfer without affecting results?

you can resume activity after 7-10 days, if you do excessive exercise and lose weight you may lose some of the transfer.  at 6 weeks the majority of what should stay would have stayed.  Add Sculptra to improve results.  Best, Dr. Emer.

There is zero evidence supporting that changing your food consumption or diet after fat transfer has any impact whatsoever.
There's also no evidence that exercising it makes a difference after fat transfer either.
What we do know is that with other tissue transfer procedures like skin graft immobilization and avoiding excessive pressure makes a difference on the percentage graft survival.
Most plastic surgeons use these basic principles of tissue grafting and apply them to fat transfer.
The highest percentage of graft survival comes from working with healthy tissues and healthy people cussing minimal trauma during harvesting, grafting small individual particles surrounded by Haily vascular live tissue without grafting too much fat in a single session followed by mobilization until capillaries revascularized the grafted fat which happens within the first 2 to 7 days.  This follows the natural healing or survival of graft or tissues which are described in medical literature as fat grafting take occurs in three phases. The first phase consists of plasmatic imbibition and lasts 24– 48 hours. This is followed by an inosculatory phase and a process of capillary ingrowth that occur essentially simultaneously until generalized blood flow has been established by the fifth or sixth postgraft day.
At the same time inflammation and scar tissue formation happens which stabilizes the grafted particles leaving them less prone to disruption from physical movement or pressure. All in all two weeks is probably a sufficient time at which point it would take significant pressure such as moderate trauma to dislocate or break the grafted fat particles. There are providers who recommend patients avoid sitting for weeks to months after fat transfer procedures such as a BBL.
Providers have protocols that are all over the map and little of it is based on any scientific literature or objective knowledge.
In regards to getting educated for this procedure these are probably not topics that are relevant or important to what really matters.
What really matters is the candidacy of the patient and the skill of the surgeon.
Those are the only two variables that make a difference.
And make a difference they do.
Best, 
Mats Hagstrom MD