Free guide · Cool & Plump
The $80 serum, for about $2 a batch.
A free, complete guide to a six-ingredient cucumber hyaluronic acid serum you can make tonight. It uses the same star ingredient as the $80 bottles, at a real 0.5%, and it’s properly preserved.
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Free 7-page guide
“The hardest part of making your own skincare is not the chemistry. It is believing you are allowed to.”
A retail HA serum
$60–$80
for 30 ml
The hyaluronic acid in it
¼ gram
about $2 a batch when you make it yourself
A complete guide, not a sample chapter.
Everything you need to make it tonight, from the exact weights to why it stays safe on the shelf.
7 pages
An instant download you can read on your phone or print for the bench.
The exact 50 g formulation
Balanced to 100.00%, with every gram written out. Not a ratio, not “some of this.” Actual weights.
A beginner-proof method
No heat, no emulsifier, nothing to melt. Just a scale, two small beakers, a whisk and pH strips. Weigh, slurry, stir, wait, adjust, bottle.
Why it’s preserved, and how
Your serum is 92% water plus a botanical extract, which is to say a growth medium. The guide explains Geogard ECT, the pH step that makes it work, and links the exact one to buy.
The damp-skin rule
The single reason hyaluronic serums sometimes make skin feel tighter, and the thirty-second fix.
A shopping list under $40
Enough to make many more batches.
Who it’s for
If you can weigh flour, you can make this.
It’s for anyone who has never made skincare and suspects they’d be bad at it. You wouldn’t be. This is the gentlest possible starting point: six ingredients, nothing to melt, nothing to emulsify, nothing that can split.
It’s also for anyone who has made things before and wants to see how I write a formulation (the percentages, the phases, the pH targets) before buying one of the paid guides.
What you’ll need
- 0.01 g scale
- Two small beakers
- pH strips
- 70% isopropyl alcohol
- 50 ml dropper bottle
Six ingredients, all available in sample sizes from ordinary cosmetic suppliers, all linked inside.
The details
- Oil-free
- Fragrance-free
- Properly preserved
- pH-adjusted
- 50 g batch, scales up or down
What comes next, if you want it
Plump It Up — For Less.
Cool & Plump uses one molecular weight of hyaluronic acid: the large one, which sits on the surface. That’s the right place to start, and it’s what most retail serums use too. But HA comes in four sizes, each hydrating at a different depth.
Plump It Up — For Less is the full guide, using the same method you’ll already know.
- All four weights of hyaluronic acid explained
- Eight targeted formulations
- Every gram calculated
- The same method as Cool & Plump
Nothing is withheld
It’s free.
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For educational purposes. Always patch test, and see the disclaimer inside. Not medical advice.