Is this the DAO muscle and am I a good candidate to get Botox in this area?

Hello and thank you for your question. We would always recommend a face to face consultation to get an accurate idea of treatment however in this case the DAO is a depressor so injecting it can help lift a downturned most. Usually this is best addressed with filler or non surgical lifting devices such as ultracel. I hope that answers your question and please always seek a qualified and experienced medical professional for treatment, best wishes

Thank you for sharing your question and photograph. That is not the DAO and is more of the jowl region of the face. Botox would not improve this appearance.

botox can help mildly but you need skin tightehing, threads, fillers, even chin augmentation to help this area. this is early sagging what we call the marionette area.
Nasolabial/marionette folds -- Fillers (juvederm, radiesse, restylane, belotero), sculptra, lasers, microneedling/prp, ultherapy, threads

at home peels like cosmelan, enlighten and aerify along with dermarolling (EmerageSkin roller with anteage AERIFY MD ampules weekly, see link) should be started now to prevent further aging.

For facial rejuvenation, I would suggest a combination approach of
1) skin care with products and PRP/microneedling
2) PDT light therapy few times a month with growth factors
3) laser treatments like clear and brilliant regularly and a few times a year Fraxel/halo Viva, Co2/Erbium
4) Sculptra injections a few times a year for collagen production with fillers like juvederm/restylane/belotero/radiesse/bellafill
5) thermage/ultherapy for yearly skin tightening with or without PDO or cone based instalift threads for lifting
6) botox every 2-3 months to stop movement lines and prevent lines at rest
7) deep microneedling RF like Fractora/morpheus8 for tightening of the skin
8) Vascular laser like vbeam/excel V or BBL forever young treatment every quarter (3-4 months)

Best, Dr. Emer.