Written by the Morning Union Team. Last updated on 10/29/2026.
For most healthy adults, the ingredients in a fascial release supplement are well tolerated, and the most common side effects are mild, such as stomach upset or diarrhea. The bigger risks are interactions. Several popular fascia ingredients may raise the risk of bleeding, one herb (gotu kola) has been linked to rare liver problems, and some minerals have a safe upper limit. If you take a blood thinner, have liver or kidney disease, are pregnant or have surgery coming up, check with your doctor first.
You have probably seen ads for fascial release supplements, and before you buy one, you want to know if it is safe. That is a smart question. In the US, dietary supplements are not approved by the FDA before they are sold, so checking the label is up to you (NCCIH).
This guide goes through the ingredients most fascia formulas use, one at a time. For each one you will find the known side effects, the medicines it may not mix with, and a link to the source so you can check it yourself.
Are fascial supplements safe? The short answer
Most of the ingredients in a typical fascia formula have a fairly gentle safety record in studies. The complaints that come up most are stomach upset, diarrhea and, less often, skin rash or allergy.
The things to take more seriously are:
- Bleeding risk. Several common ingredients may thin the blood a little. This matters if you take a blood thinner or have surgery coming up.
- The liver. Gotu kola has been linked to a small number of liver injury reports.
- Mineral limits. Boron and manganese have a safe upper limit, and it is easy to go over it if you take several supplements.
- Weak safety data. For some ingredients, such as serrapeptase, there simply is not much long-term safety research.
A simple habit helps with all of this: take the label to your doctor or pharmacist and ask them to check it against your medicines.
Side effects, ingredient by ingredient
- Hyaluronic acid. The water-holding gel found in fascia and joint fluid. A review of trials using 48 to 240 mg a day, for 2 weeks up to 12 months, found no side effects caused by the hyaluronic acid itself (Oe et al., 2016). Worth knowing: several of the review's authors work for a company that makes hyaluronic acid.
- Boswellia. A plant resin, also known as frankincense. The US National Center for Complementary and Integrative Health (NCCIH) says it is likely safe by mouth, and extract doses up to 1,000 mg a day have been used safely in trials lasting up to 6 months (NCCIH). Allergic skin reactions have been reported, and boswellia may raise bleeding risk if taken with blood thinners such as warfarin (Memorial Sloan Kettering).
- Bromelain. An enzyme from pineapple stems. It seems to be well tolerated, and the most common side effects are stomach upset and diarrhea (NCCIH). Allergic reactions have been reported. It may also raise blood levels of tetracycline antibiotics (Memorial Sloan Kettering).
- Serrapeptase. An enzyme used in some countries for swelling and pain. A systematic review found the evidence for it is weak and that data on its long-term safety is lacking (Bhagat et al., 2013). A later review agreed that more safety data is needed (Jadhav et al., 2020).
- Gotu kola. A leafy herb used in traditional medicine. Its listed side effects are skin rash and liver toxicity. More on the liver below (Memorial Sloan Kettering).
- Grape seed extract. Generally well tolerated by mouth (NCCIH). Stomach upset has been reported, and lab studies show it can slow blood clotting cells, so ask your doctor if you take a blood thinner (Memorial Sloan Kettering).
- Pine bark extract. Irritability and lower energy have been reported, and it may raise bleeding risk with blood thinners. Do not take it if you are allergic to pine bark (Memorial Sloan Kettering). A Cochrane review of 27 trials could not reach firm conclusions about its safety or its benefits, because the studies were small and poorly reported (Robertson et al., 2020).
Ingredients that may raise bleeding risk
Five common fascia ingredients have some link to bleeding or clotting:
- Boswellia, grape seed and pine bark can slow down platelets, the cells that help blood clot (MSK on boswellia, MSK on grape seed, MSK on pine bark).
- Bromelain may increase the risk of bruising and bleeding, based on early lab research (MSK on bromelain).
- Serrapeptase has clot-dissolving (fibrinolytic) activity, and its long-term safety has not been studied well (Bhagat et al., 2013).
To be fair, most of this comes from lab studies, and how much it matters in real life is not yet known. But a fascia formula often combines several of these in one capsule. If you also take warfarin, another blood thinner or a daily antiplatelet medicine, the small effects could add up.
Two practical steps. If you take any blood thinner, ask your doctor before you start. If you have surgery or dental work planned, tell your surgeon or dentist about every supplement you take, and ask when to stop.
Gotu kola and liver reports
Gotu kola is the ingredient most often asked about when it comes to safety, because liver toxicity is listed among its side effects (Memorial Sloan Kettering).
The best-known reports come from doctors in Argentina. They described three women, aged 49, 52 and 61, who developed jaundice (yellowing of the skin and eyes) and liver inflammation after taking gotu kola for 20 to 60 days. All three got better after stopping it. One woman took it again later and the liver damage came back (Jorge and Jorge, 2005).
These cases are rare. Still, lab studies suggest gotu kola can affect the liver enzymes that process many common medicines, although how much that matters in people is not known (Memorial Sloan Kettering).
If you have liver disease, drink a lot of alcohol or take several daily medicines, talk to your doctor before taking a formula with gotu kola. If you notice yellowing of your skin or eyes on any supplement, stop it and call your doctor.
Minerals: silica, boron and manganese
- Silica. Silicon is found in bone and tendons. No recommended daily amount has been set, and there is very little safety data on silica taken by mouth, partly because problems are rarely reported (Martin, 2007).
- Boron. The safe upper limit for adults is 20 mg a day, and the studies that found benefits used about 3 mg a day or less (Pizzorno, 2015).
- Manganese. The safe upper limit for adults is 11 mg a day. Some joint supplements have supplied 30 to 40 mg a day. Manganese leaves the body mainly through bile, so people with liver disease can build it up, which may cause nerve problems similar to Parkinson's disease. Tetracycline antibiotics and magnesium antacids can also affect how it is absorbed (Linus Pauling Institute).
The key is to add up all your sources. If you take a multivitamin, a bone formula and a fascia formula, the boron and manganese in each one count toward the same daily limit.
Who should check with a doctor first
Please talk to your doctor or pharmacist before taking a fascia supplement if any of these apply to you:
- You are pregnant or breastfeeding. Little is known about the safety of boswellia, bromelain or grape seed extract in medicinal amounts during pregnancy or breastfeeding (NCCIH on boswellia, NCCIH on bromelain, NCCIH on grape seed).
- You take a blood thinner or daily antiplatelet medicine, or you have a bleeding disorder.
- You have surgery or dental work coming up.
- You have liver disease, because of the gotu kola reports and the way manganese is cleared.
- You have kidney disease, or any long-term condition where your doctor watches your minerals.
- You take several daily medicines, such as antibiotics, heart medicines or anything processed by the liver.
- You have allergies, for example to pineapple (bromelain) or pine.
One more thing. If your aches or stiffness are new, getting worse, or come with swelling, fever or weight loss, see a doctor before trying any supplement. It is important to rule out conditions that need proper medical treatment.
If you want to know more about what each ingredient is and why it is used, read our guide to fascial supplement ingredients.
Frequently asked questions
Do fascia supplements have side effects?
They can. The most common are mild, such as stomach upset, diarrhea or a skin rash. Some ingredients, such as boswellia, bromelain, grape seed, pine bark and serrapeptase, may raise bleeding risk, and gotu kola has been linked to rare liver injury reports.
Is it safe to take a fascia supplement with blood thinners?
Ask your doctor first. Several common fascia ingredients may affect clotting, and a formula often combines several of them. Your doctor can check the label against your medicine and decide if it is safe for you.
Can a fascia supplement hurt your liver?
It is rare, but gotu kola, a common fascia ingredient, has been linked to a small number of liver injury cases. People with liver disease should also be careful with manganese. If you notice yellow skin or eyes, stop the supplement and call your doctor.
Is it safe to take a fascia supplement every day?
Most fascia ingredients were studied as daily supplements over weeks to months. Stay within the label dose, keep your total boron under 20 mg and manganese under 11 mg a day from all supplements, and check with your doctor if you take other medicines.
Can I take a fascia supplement while pregnant?
Little is known about the safety of ingredients like boswellia, bromelain and grape seed extract in medicinal amounts during pregnancy or breastfeeding. Talk to your doctor or midwife before taking one.
Before you decide on any fascia supplement, it helps to understand the tissue itself. Read our plain-English guide to fascia. It explains what the research found, which conditions it has been linked to, and how to support your fascia every day.
Fascia relief: start here
The aches, stiffness and tiredness that no test can explain may come from one tissue. See what the research found and how to support it.
Read the fascia guide
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*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
This article is for general information only. It is not medical advice. Talk to your doctor before starting a new supplement, especially if you take other medicines.