Is It Safe to Take a Hyaluronic Acid Supplement?

For most adults, yes: oral hyaluronic acid at the 120 to 240 mg a day used in trials has been well tolerated, with side effects no more frequent than placebo, and no interaction with medicines has been reported. The confusion around its safety comes from mixing up three different products. Hyaluronic acid injections (dermal fillers and knee injections) have the side effects people list, bruising, swelling, pain at the site; serums and creams sit on the skin; the supplement is a swallowed polysaccharide, and its record is the quiet one.^{1, 2} What is not known: it has not been studied in pregnancy or breastfeeding, and the trials are short, mostly eight to twelve weeks. In the UK, hyaluronic acid has no authorised health claim, so what the trials found about skin moisture and knee comfort is reported here as evidence rather than as a promise.³

• Safety record: trials at 120 to 240 mg a day, 8 to 12 weeks, side effects no different from placebo
• Who should ask first: pregnant and breastfeeding women (no data); anyone with an egg or poultry allergy choosing a rooster-comb source
• Not a side effect of the supplement: bruising, swelling, lumps, high blood pressure; these belong to injections or to nothing at all
• Collagen or hyaluronic acid: different molecules, both studied for skin; many people take both

What an oral hyaluronic acid supplement is

Hyaluronic acid is a long sugar chain, a glycosaminoglycan, that holds water in skin, joint fluid and the eye; about half of the body's supply is in the skin, and it is turned over quickly, with a third replaced every day. Supplements contain sodium hyaluronate, the salt form, made either by bacterial fermentation, which is how most are now produced, or extracted from rooster combs. Molecular weight varies from under 50 kDa to over a million, and trials have used both low and high weights at 120 to 240 mg a day.^{1, 4} That is the first thing to check on a label, because "hyaluronic acid" on a gummy at 20 mg is not the dose that was studied.

Is hyaluronic acid absorbed when taken orally?

Partly, and this was the scientific objection for years. Studies that fed radiolabelled hyaluronic acid to rats and dogs found it absorbed from the gut, in part after gut bacteria had broken it into smaller pieces, and distributed to skin, joints and bone; a later rat study found dietary hyaluronic acid migrating into the skin.^{4, 5} In humans the evidence is indirect: the trials below measured skin and joint outcomes rather than blood levels. So the mechanism is plausible and the human proof is the trial results themselves.

What the trials found

For skin, a review of Japanese trials found that 120 mg a day of hyaluronic acid for four to eight weeks increased skin moisture measured by instrument compared with placebo in people with dry skin, and a 12-week double-blind trial of 120 mg in 60 adults found wrinkle depth and skin lustre improved against placebo.^{1, 6} A 2025 trial reported gains in hydration, elasticity and wrinkle depth over 12 weeks.⁷ For knees, a review of oral hyaluronic acid trials in knee pain found consistent improvement in symptoms over 12 weeks and longer, and a 2024 double-blind trial of sodium hyaluronate relieved knee discomfort over 12 weeks.^{2, 8} The trials are small, many were industry-funded, and none is long. That is enough to say the supplement does something measurable in trials and well tolerated, and not enough for an authorised claim, which is the UK register's position.³

Hyaluronic acid side effects

The side effects of hyaluronic acid depend entirely on the route. Oral: in the trials above, adverse events were mild, mainly digestive, and no more frequent than placebo; there is no report of allergic reaction to fermented hyaluronic acid and no reported interaction with any medicine.^{1, 6, 8} Injected into skin as a filler: bruising, swelling, lumps, and rarely vascular complications, which is why fillers belong with a trained practitioner. Injected into a knee: temporary pain and swelling at the site. Topical: occasional irritation. Three claims that circulate about the supplement have no evidence behind them and we have removed them from this page: that oral hyaluronic acid raises blood pressure, that it is antibacterial, and that it speeds wound healing. Hyaluronic acid is used in wound dressings, which is a different thing from swallowing it.

Who should not take hyaluronic acid supplements?

• Pregnant and breastfeeding women, because there are no trials, which is the standard position for most supplements rather than a sign of harm.
• People with egg or poultry allergy, if the product is extracted from rooster comb; fermented sodium hyaluronate avoids this, and the label should say which.
• Anyone having cancer treatment should clear every supplement with their oncology team as routine. Hyaluronic acid is involved in normal tissue biology and some tumour biology, which has led to online warnings; no study has shown an effect of the oral supplement either way.
• People on medicines have no documented interaction to worry about, but a pharmacist's check costs nothing. For collagen's own cautions see is there a downside to taking collagen.

Collagen or hyaluronic acid: which should you take?

They are different molecules with different jobs. Collagen is the protein framework of the skin's deep layer; hyaluronic acid is the water-holding gel between the fibres. Collagen peptides have the larger evidence base: four meta-analyses covering more than 1,700 people found skin hydration and elasticity improving over eight to twelve weeks, plus trials for joints, bone and muscle.⁹ Hyaluronic acid's trials are fewer and smaller. Nobody has compared them head to head, and in laboratory work collagen peptides prompt skin cells to make more hyaluronic acid of their own, so the two are not rivals. Many people take both; there is no interaction. If you take one, the weight of evidence favours collagen peptides at 2.5 g a day or more; the Wellgard collagen guide sets out what the trials found and does collagen make you look better goes through the skin trials. Wellgard Collagen Powder supplies 13 g of bovine hide collagen peptides per serving and has been made to the same specification since 2018. Wellgard Skin Fuel pairs hyaluronic acid with vitamin C, which contributes to normal collagen formation for the normal function of skin, and with vitamin A and zinc, which contribute to the maintenance of normal skin; those are the authorised claims, and they belong to the vitamins.

Frequently asked questions

Is it safe to take hyaluronic acid orally every day?

The trials dosed daily for up to twelve weeks without a safety signal. There is no UK upper limit; the body makes and turns over several grams a day.^{1, 6}

How many mg of hyaluronic acid should I take?

The trials used 120 to 240 mg a day. Products with 20 to 50 mg have not been tested at that dose.^{1, 7}

Is hyaluronic acid bad for your liver?

No evidence suggests so. It is a sugar chain the body makes and breaks down constantly; the oral trials reported no liver signal.

What foods contain hyaluronic acid?

Animal connective tissue, so bone broth, skin-on meat and gristle; amounts are small and unmeasured on labels, and the body makes its own from glucose and glutamine.

What should you not mix with hyaluronic acid?

Nothing is known to interact with the supplement. The "do not mix" lists online are about skincare actives in serums, not about anything you swallow.

Can I take collagen and hyaluronic acid together?

Yes. There is no interaction, and the two address different parts of the skin.

Sources

1. Kawada C, et al. Ingested hyaluronan moisturizes dry skin. Nutrition Journal, 2014. PubMed 25014997.
2. Oe M, et al. Oral hyaluronan relieves knee pain: a review. Nutrition Journal, 2016. PubMed 26818459.
3. Department of Health and Social Care. Great Britain nutrition and health claims (NHC) register. gov.uk.
4. Balogh L, et al. Absorption, uptake and tissue affinity of high-molecular-weight hyaluronan after oral administration in rats and dogs. Journal of Agricultural and Food Chemistry, 2008. PubMed 18959406.
5. Oe M, et al. Dietary hyaluronic acid migrates into the skin of rats. The Scientific World Journal, 2014. PubMed 25383371.
6. Oe M, et al. Oral hyaluronan relieves wrinkles: a double-blinded, placebo-controlled study over a 12-week period. Clinical, Cosmetic and Investigational Dermatology, 2017. PubMed 28761365.
7. Amin P, et al. Oral hyaluronic acid supplement: efficacy in skin hydration, elasticity, and wrinkle depth reduction. Journal of Drugs in Dermatology, 2025. PubMed 40911749.
8. Sugiyama K, et al. Oral sodium hyaluronate relieves knee discomfort: a 12-week double-blinded, placebo-controlled study. Experimental and Therapeutic Medicine, 2024. PubMed 38234616.
9. Pu SY, et al. Effects of oral collagen for skin anti-aging: a systematic review and meta-analysis. Nutrients, 2023. PubMed 37432180.

This article is general information, not medical advice. Dermal fillers and joint injections are medical procedures; this page is about the supplement only.