# @geetayadavmd on Instagram

- **Type:** Video
- **Original URL:** https://www.instagram.com/p/DdG1w92jbNF
- **Gondola URL:** https://gondola.cc/posts/70379351-geetayadavmd-instagram
- **Thumbnail:** https://img.gondola.cc/tr:w-,h-,fo-auto/postThumbnails/f4a6de01b4.jpg
- **Posted:** 2026-09-10T12:31:38.000+00:00
- **Account Owner:** Geeta Yadav (@geetayadavmd) — https://gondola.cc/geetayadavmd

## Caption

15% is not a random number.
Partnered with skinceuticals on the new C E Ferulic, the formula's first update in over 20 years. #ad

The Duke Parameters come from the original research: pure vitamin C absorbs best between 10 and 20 percent, at a pH under 3.5. Above 20, absorption drops. More is not better, formulated is better.
The new clinical testing showed improvement across 8 signs of aging, in all skin tones and men. That should be the default. It still isn't.

Decade club: how long has the original been in your routine?

#skinceuticals #VitaminC #longevity

## Stats

- **Views:** 1,459
- **Likes:** 17
- **Shares:** 0
- **Comments:** 0

## Tags

vitaminc, skinceuticals, ad, longevity

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