Bathroom shelf with skincare products

Methodology & about

The trust scaffolding every comparison table on this site links back to.

Plenishing — from the Scots word for household furnishings, and a word the beauty shelf already uses for replenishing skin — is skincare for readers over 50, built on one promise: the depth is real, or it does not ship.

Skincare products arranged on a bathroom shelf
We compare label facts we can verify. If we cannot verify a spec, we flag it instead of inventing it.

How we grade evidence

GradeMeaning
StrongRandomised controlled trials, ideally replicated, or long dermatology consensus (daily sunscreen, tretinoin)
Good / ModerateSome controlled trials — small or short — with a consistent direction
LimitedSmall, short, often industry-funded studies; laboratory work; expert opinion
Studied ≠ provenStudied and heavily marketed, but has not met the bar above — most peptides for wrinkles, topical collagen, growth factors, stem-cell and exosome creams

Our standing policies

What we will and will not do

  • No fabricated prices and no star ratings, anywhere. Prices change; ratings we invented would be fiction
  • Comparison tables use label facts — SPF, filters, key ingredients, percentage disclosed or not — checked against manufacturer listings, with a dated 'specs checked' note
  • Where a line reformulates often, we flag the SKU for re-verification on the page itself rather than presenting a stale spec as current
  • US and EU formulas with the same product name can differ. We do not merge their specs into one row
  • Affiliate links are tagged Amazon search links on the product itself — no buttons, no cloaking. The disclosure sits in the footer, in small print, as the program requires
  • Information only: no diagnosis, no treatment promises, no miracle language, and a red-flag list on every treatment and pigment page
  • No affiliate sign-ups are chased for traffic we do not yet have. This site earns its audience first

Anchor sources

Hughes et al., Annals of Internal Medicine 2013 (Nambour daily-sunscreen trial) · Thornton, Dermatoendocrinol 2013 (estrogens and skin) · American Academy of Dermatology guidance on sunscreen, patch testing, dry skin and the ABCDE rule · US FDA guidance on alpha hydroxy acids and sunscreen filters · Hakozaki et al. 2002 and Bissett et al. 2005 (niacinamide trials) · The 2025 JAAD dermatologist consensus work on cosmetic ingredients — cited by name here; exact consensus percentages are verified against the primary citation before they are ever quoted numerically on a product page.

Henry's hair-science shelf — Grateloupia, laminin-511 and related research — belongs to a different project and deliberately does not appear on Plenishing.