Written by the Plenthera team (orthomolecularly trained). Scientifically reviewed in April 2026. Last updated: April 30, 2026.
Hyaluronic acid is your skin and joints' natural "water-retaining" molecule — one molecule can bind up to a thousand times its own weight in water. From the age of 25, natural production decreases; by age 40, the current HA concentration is about half of what it was in your youth. At Plenthera, you'll find premium hyaluronic acid in low-molecular-weight form for optimal oral absorption — often combined with collagen and vitamin C for a complete connective tissue approach. Vegan, produced via fermentation.
Which hyaluronic acid is right for you?
| Form | Application | Best for |
|---|---|---|
| LMW capsules (oral) | Systemic (skin + joints) | General supplementation |
| LMW powder (oral) | Systemic | Mixing, smoothies |
| HA + collagen | Connective tissue focus | Beauty stack |
| HA + collagen + vit C | Complete connective tissue | Premium beauty / joints |
| Topical serum (HMW) | Surface skin hydration | Cosmetic use |
What is hyaluronic acid?
Hyaluronic acid (HA) is a glycosaminoglycan — a long chain of sugar units — that naturally occurs in skin (~50% of the body's HA), joint fluid, eye fluid, and connective tissue. It binds water, thereby providing volume, shock-absorbing properties, and moisture balance to tissues.
Hyaluronic acid is a remarkable molecule. It binds water like no other naturally occurring substance — one gram of HA can hold six liters of water. In the skin, HA is the key component that ensures the intercellular matrix is filled and firm. In joints, it forms a major component of the joint fluid, providing shock-absorbing and lubricating properties.
From around 25 years of age, the body's own HA production decreases. By age 40, the skin's HA concentration is about 50% lower than in youth, and around 70% lower by age 50. For many, this is a noticeable difference — drier skin, finer lines, less volume. For joints, the same decrease can contribute to stiffness and reduced comfort. This makes HA supplementation popular in two niches simultaneously: beauty (skin) and joints.
The molecular weight determines what an HA supplement does. High-molecular-weight HA (>1,000 kDa) is traditionally the form used in topical cosmetics — a gel layer on the skin that superficially hydrates but is not absorbed by the skin in significant amounts. For oral supplementation, low-molecular-weight HA (<500 kDa) is the logical choice: after ingestion, it is fragmented into smaller pieces that can reach the body. Also check out our collagen category and vitamin C category for the complete connective tissue cluster.
Science, molecular weight, and EFSA status
Most clinical research on oral hyaluronic acid comes from Japan, where HA supplements have been mainstream for decades. Studies with 100-200 mg/day of low-molecular-weight HA for 8-12 weeks show improvements in skin hydration, elasticity, and joint comfort in older adults, measured by cutometer or dermatoscope. Results are generally positive, but the studies are often small and largely industry-funded.
Important: despite research, EFSA has not yet recognized any health claims for hyaluronic acid. Applications related to skin hydration and joints have been rejected due to insufficient causal evidence based on EFSA's strict criteria. Therefore, we do not make literal efficacy claims.
Hyaluronic acid is a food supplement, not a medicine. Hyaluronic acid as a food supplement is fundamentally different from hyaluronic acid injections (intra-articular or cosmetic) — which are medical procedures.
Molecular weight — why it matters
High-molecular-weight HA (>1,000 kDa): Classic form in topical cosmetics. Too large to penetrate the skin into the dermis — works mainly as a superficial hydrating layer. For creams and serums, this is the logical form.
Medium-molecular-weight HA (500-1,000 kDa): Mixed profile — used in some oral formulations and in cosmetic serums with "deeper penetration" claims.
Low-molecular-weight HA (<500 kDa): The form for oral supplementation. After ingestion, it is fragmented by the gastrointestinal tract and thus reaches the skin and joints.
Oligo-HA / mini-HA (<10 kDa): Highly fragmented form, premium niche with claims of direct systemic absorption.
At Plenthera, we work with low-molecular-weight HA for oral supplements, as this is the form with clinical data for systemic effects.
The forms of hyaluronic acid at Plenthera
Low-molecular-weight hyaluronic acid capsules
Oral supplement, 100-200 mg per day. Our first-line for skin and joint concerns.
Hyaluronic acid powder
For those who want to mix it into a smoothie or drink themselves. Flavor-neutral, mixable in water.
Hyaluronic acid + collagen
Synergistic combination — both connective tissue components together. Classic beauty formula.
Hyaluronic acid + collagen + vitamin C
Complete connective tissue stack. Vitamin C is an official cofactor in collagen formation (EFSA claim).
Topical hyaluronic acid (serums)
For superficial skin hydration — high- or medium-molecular-weight HA in a serum formula.
How to use hyaluronic acid?
Simple basic approach for hyaluronic acid:
- Determine your goal: skin (100-150 mg/day), joints (150-200 mg/day), or connective tissue stack.
- Choose low-molecular-weight HA for oral supplementation.
- Take on an empty stomach or with a light meal.
- For maximum effectiveness, combine with collagen (5-10 g) and vitamin C (500 mg).
- Allow at least 8-12 weeks of consistent use for a fair evaluation — skin and joint effects are cumulative.
- Drink enough water — HA is a water binder.
- For topical application: choose a serum with high-molecular-weight HA, apply to damp skin, and seal with a cream.
Myths and misconceptions about hyaluronic acid
Myth 1: "Hyaluronic acid in a cream penetrates deep into the skin."
Incorrect for high-molecular-weight HA — too large to penetrate the skin barrier. It works superficially as a hydrating top layer. For systemic effects, oral intake is more effective.
Myth 2: "Hyaluronic acid is a fat-soluble substance."
Incorrect. HA is water-soluble — it binds water (up to 1,000x its own weight). Hence its hydrating properties.
Myth 3: "The more hyaluronic acid, the faster the results."
Doses above 300 mg/day do not show additional effect and may cause stomach upset. Clinical research uses 100-200 mg/day.
Myth 4: "Hyaluronic acid from rooster combs is better than fermented HA."
Incorrect. Fermented HA is molecularly identical to animal HA and has a cleaner production process, no allergy risk for people with chicken allergies, and is vegan.
Combining hyaluronic acid with other supplements
Hyaluronic acid is often combined for a complete connective tissue or beauty approach. Popular combinations:
- Collagen: synergistic connective tissue combination.
- Vitamin C: cofactor in collagen synthesis (EFSA claim).
- Zinc: cofactor in connective tissue formation.
- Biotin: for hair/skin/nails cluster.
- Glucosamine + MSM: for those focusing HA on joints.
- Bone broth: also provides glycosaminoglycans.
- Omega 3: for general skin and connective tissue support.
Frequently asked questions
What is hyaluronic acid?
A glycosaminoglycan naturally found in skin, joints, eye fluid, and connective tissue. Binds water — up to 1,000x its own weight.
What is the difference between low and high molecular weight?
LMW (<500 kDa) for oral absorption. HMW (>1,000 kDa) for topical cosmetics.
Does oral hyaluronic acid really work?
Clinical research (especially Japanese) indicates effects on skin hydration and joints. EFSA claims do not exist.
How much hyaluronic acid per day?
100-200 mg of low-molecular-weight HA per day. Clinically: 120-150 mg/day, 8-12 weeks.
When to take hyaluronic acid?
On an empty stomach or with a light meal. Timing is flexible.
Does hyaluronic acid help with skin hydration?
Clinical research indicates improvement with oral use. EFSA claims do not exist.
Does hyaluronic acid help with joints?
HA is a major component of joint fluid. Clinical research shows positive results. EFSA claims do not exist.
Is hyaluronic acid vegan?
Yes, if produced via fermentation. Our products are fermentation-HA.
Can you combine hyaluronic acid with collagen?
Yes, a classic synergistic combination. Often in the same formula.
Does hyaluronic acid have side effects?
Generally well tolerated. At high doses, mild stomach upset may occur.
Sources
- Oe M. et al., "Oral hyaluronan relieves knee pain: a review", Nutr J (2016).
- Kawada C. et al., "Ingested hyaluronan moisturizes dry skin", Nutr J (2014).
- Goncharuk OO. et al., "Topical and Systemic Hyaluronic Acid for Skin Rejuvenation", J Drugs Dermatol (2020).
- EFSA — Scientific Opinions on hyaluronan claims (rejected).
- Salwowska NM. et al., "Physiochemical properties and application of hyaluronic acid", J Cosmet Dermatol (2016).
Disclaimer: This text is for informational purposes only and does not replace medical advice. Hyaluronic acid is a food supplement, not a medicine. In case of doubt or if you are taking medication, we recommend consulting a doctor or orthomolecular therapist first.