What kind of filler and how much needed to restore volume in face? (Photo)

The face will lose volume
overtime. The loss of volume will cause:

1)Loss of height and definition in cheeks

2)Narrowing of the upper 1/3 of face

3)Decent of facial tissue

4)Irregularities of jawline

5)Thinning of lips

6)Change the overall balance of the face from and upside down
egg to an oval shape

The addition of volume is best used to restore the
balance, height and definition to the face.
This is the true art of facial fillers.
In your situation, it is most important to choose a qualified injector. The pictures you posted are not helpful as I
cannot make specific recommendation on such limited information. I hope this helps.

Weight fluctuation and aging can both cause volume loss on the cheeks or midface.  Hyaluronic Acid (HA) Dermal fillers such as Voluma or Restylane Lyft are great options for volume replacement.  It is recommended that you see a Board Certified Injector for a consultation to get a better idea of how many syringes you will need.  

It is difficult to say how many syringes you will need to achieve your goals, but it can be done  a little at a time to get your desired result.

Weight loss does cause facial volume loss (as does aging, however, turning 30 is still on the young spectrum in regards to facial volume loss). I would recommend Juvederm Voluma, the first filler FDA-approved for mid-face volume loss. This would be injected right along the top of the zygomatic arch (facial cheek bone) to lift the skin and add volume in the mid-face where you have lost it. Other Hyaluronic Acid (HA) fillers are too thin to add volume and are preferred for lines and intra-dermal injections. I would recommend 2 syringes of voluma to start for your face specifically.

  Hi, I have performed many facial shaping procedures over the past 30 years.  Non smiling photos of the face front and side would help in the evaluation.  Following the beauty principles outlined in my book on face and body beauty, women look the most feminine and attractive when they have heart shaped faces.  Heart shaped faces have cheeks that are full and round anteriroly (in the front).  Cheek augmentation with a dermal filler (I prefer Restylane Lyft) or using cheek implants for a permanenet enhancement will create cheeks that are full and round in the front to feminize the entire face.  Hope this helps.