The Vellum Journal
Notes from the lab.
May 26, 2026
Niacinamide vs vitamin C: which goes first in your routine
The old "they cancel each other out" rule is a 1960s myth. Apply C first, wait 60 seconds, then niacinamide — and stagger your copper peptides instead.
May 10, 2026
How we source squalane (and why it matters)
Sugarcane-fermented, 99.9% pure, single-source from a plant in Brazil. The three squalane sources, and why we''ll never use shark or olive.
Apr 25, 2026
The 14-day brightening protocol our derm panel recommends
A two-week stack our three-derm panel signed off on. Vitamin C, niacinamide, azelaic, low-dose tret — and the three conditions this won''t fix.
The Vellum Circle
Join us for early access and $10 off your first order.
Get the new-product previews, the unfiltered formulation notes from our lab, and the once-a-quarter sample box. No spam — we send four emails a month, maximum.
Free US shipping over $5060-day risk-free returnsTwo free samples with every order