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The KinAura letter

Longevity Notes

Letters we write rarely, and only when we have something to say: news from the clinic and what the science of longevity really says, with sources at the end of every issue.

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3D rendering of the dermis: a network of golden collagen fibres, dense on one side and loosened on the other, with fibroblastsLongevity NotesNo. 0 · September 2026Beneath the Surface
Latest issue · No. 0 · September 2026

Facial collagen: why we lose it and what stimulating it really means

Collagen is the scaffold of the skin. Here is why it loosens with age, what really reaches the dermis and how the cells that make it get back to work.

In this issue
  1. 01What collagen is, and where it lives
  2. 02Why we lose it with age
  3. 03What «stimulating collagen» really means
  4. 04Creams and supplements: what really gets there
  5. 05How we stimulate it in clinic
  6. 06Measure before promising

Read the issue4 min read · 8 scientific sources

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Every issue is a complete letter, with sources at the end. Turn the cover to see the contents.

3D rendering of an ivory cell membrane with small gold receptors and amber glucose molecules struggling to get in
Longevity NotesNo. 1 · Out on 1 November

Insulin resistance: symptoms, tests and how to reverse it

Out on 1 November

It can stay silent for years while blood sugar looks normal. How to recognise insulin resistance, which tests measure it and what helps reverse it.

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When cells respond less to insulin, glucose struggles to get in.

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