What hyaluronic acid actually is
Let's start with the basics — they change the whole perspective. Hyaluronic acid (HA) isn't some exotic ingredient pulled from a lab. It's a glycosaminoglycan — a natural polysaccharide your body produces every day. An adult body contains about 15 grams of HA. Almost half of it sits in the skin.
Its superpower? Binding water. A single hyaluronic acid molecule can hold up to a thousand times its own weight in water. That's why a baby's skin is so remarkably firm and plump — and why, as HA production declines with age (we lose around 1% a year after 25), skin starts to lose volume, elasticity and radiance.
Molecular weight — the key to understanding HA
Picture hyaluronic acid as a chain. That chain can be very long (high molecular weight, >1000 kDa) or cut into short fragments (low molecular weight, <50 kDa).
Sounds complicated? That's because it is. And that's why the delivery method matters more than almost anything else.
HA in a cream — good, but not game-changing
A hyaluronic acid serum is one of the best hydrating products on the market. No exaggeration — HA in cosmetics works. But you need to know how and where.
A cream or serum with HA hydrates the epidermis. It doesn't reach the dermis, where the real action happens — collagen and elastin production, and the fibroblasts responsible for skin firmness. Even the best low molecular weight HA formulations penetrate no further than the living keratinocytes of the epidermis. That's still a great result — skin looks more hydrated, dehydration lines become less visible, and texture improves.
- What an HA cream won't do: it won't fill nasolabial folds, restore lost volume in the cheeks, structurally rejuvenate the skin, or replace natural HA in the dermis.
- What it does well: it hydrates the skin's surface, smooths fine lines caused by dehydration, improves comfort and the skin barrier, and preps skin for the next products in your routine.
HA in supplements — controversy and hope
What if you could hydrate your skin from within? The supplement industry has turned that promise into a multi-billion-dollar market. The truth is more complicated. Oral hyaluronic acid passes through the digestive tract, where enzymes and stomach acid break it down. Estimated absorption sits at around 5–10% — and even that figure is debated among scientists.
- HA supplements likely have some positive effect on skin hydration.
- The mechanism isn't fully understood — does HA itself reach the skin, or do its fragments stimulate the body's own production?
- The effect is subtle and requires at least 8–12 weeks of supplementation.
- They won't replace topical skincare or in-salon treatments.
- They're safe — no significant side effects.
Think of HA supplements as a complement, not a foundation. If your diet is rich in vegetables and fruit and you stay well hydrated, an extra HA supplement is a nice bonus — not a necessity.
HA by injection — this is where real change begins
Injectable hyaluronic acid is the only form that delivers HA directly where it's needed — into the dermis and subcutaneous tissue. And here comes another key distinction: cross-linked vs non-cross-linked HA.
Three forms of HA — a comparison
- Cream / serum: penetrates the epidermis, provides surface hydration, results last a few hours to 1–2 days, strong scientific evidence (epidermal hydration), minimal risk.
- Supplement: absorbed through the digestive tract, provides a subtle improvement in hydration, requires continuous supplementation for at least 8–12 weeks, moderate and growing evidence, minimal risk.
- Injection: delivered directly into the dermis / subcutaneous tissue, provides deep hydration, filling or remodelling, results can last 6–18 months, very strong scientific evidence, low risk with a qualified specialist.
So what should you choose?
The answer is: it depends on your goal — and you don't have to choose just one.
- Everyday hydration — an HA serum is your staple. Look for a formula with a blend of molecular weights and apply it to damp skin.
- Systemic support — an HA supplement at a dose of 100–200 mg won't hurt, and it may help. Treat it as an addition to a balanced diet.
- A real change in skin quality — needle mesotherapy with non-cross-linked HA, or Profhilo, is an investment that can genuinely remodel skin from within.
- Volume or contour correction — HA fillers, in the hands of an experienced doctor, are the gold standard in aesthetic medicine: safe and reversible.
What to look for and what to avoid
- A cream won't replace an in-salon treatment. It's like comparing a vitamin C tablet with an IV drip — a different route, a different dose, a different result.
- "Hyaluronic acid" on the label isn't enough. Look for information on molecular weight and concentration.
- HA fillers should only ever be administered by doctors. Not by cosmetologists, not in a hair salon, not at someone's home. Vascular complications require immediate medical intervention.
- Profhilo is not a filler, and a filler is not Profhilo. These are two different treatments with two different goals.
When it's worth talking to a specialist
Hyaluronic acid is an ingredient that genuinely works — in every form, at its own level. But to choose wisely, it's worth consulting someone who can see your skin in person, assess its needs and suggest a strategy rather than a single product.
At J'ADORE INSTYTUT, we perform needle mesotherapy with pure HA, Profhilo treatments, and hyaluronic acid filler corrections. Every treatment starts with a consultation, where we assess your skin quality, discuss your expectations and select the right protocol — because even the best ingredient, delivered in the wrong form, is a wasted investment.