What are complementary and alternative therapies? Do they work, and are they safe?
What are complementary and alternative therapies?
Complementary therapies can be used alongside your medical treatment. They aim to help you feel better. But they do not claim to treat or cure your condition.
Examples of complementary therapy include:
- Massage or aromatherapy to relax or to ease sore muscles.
- Cool baths and showers to help with itching.
- Mindfulness and meditation to help with anxiety.
Alternative therapies claim to treat or cure a condition. Alternative therapists often tell you that their treatment is better or safer than treatment from your doctor. They might recommend that you stop the treatment your doctor has recommended. Some alternative therapists genuinely believe that they can help. Others try to take advantage of people who are worried, confused and looking for help.
Some medicines can fall into either of these groups. For example herbal remedies, traditional Chinese medicine, homeopathy, natural remedies, and naturopathic medicines. These might all be sold to help with symptoms or to actually treat a condition. Whatever they are being sold for, they can sometimes be dangerous for people with a liver condition.
Are complementary and alternative therapies safe if I have a liver condition?
Complementary therapies like massage and aromatherapy are usually safe. But this can be different for everyone. For example, it might not be safe to have a massage if you have problems with bleeding or blood clotting. So always check with your medical team first if you have a serious liver disease.
Medicines and other alternative therapies can be more risky. The liver has many jobs. One of these is breaking down (metabolising) medicines. If your liver is not working properly, it might not be able to do this. When this happens, medicines can build up in your body. This can make you very ill and can cause more damage to your liver. You can find out more about this here.
Some alternative and complementary medicines can change the way other medicines work. This can mean important medicines do not work properly. Or it can increase the risk of serious side effects.
You might not know how much medicine (the dose) you are getting.
Licenced medicines must be made in a very controlled way. This makes sure that every time you take your medicine you get the exact same amount of it. This amount must be written on the package.
This is not always possible for complementary and alternative medicines. For example, plants grow differently at different times of the year. So the amount of active ingredient in a herbal medicine might depend on when the plants were collected. This means that the medicine you take might not have enough of the active ingredient to work. Or it could have so much that it is dangerous.
Do complementary and alternative therapies work for liver conditions?
Most complementary and alternative therapies are not available on the NHS. This is because they do not have the evidence to back them up. You can read more about some specific therapies on the NHS website.
Complementary therapies like massage or aromatherapy work well for some people and not for others. There is not usually strong evidence for them but they do not replace your medical treatment. So if you can afford to pay for them and you enjoy them this might not be a problem.
Alternative therapies seek to replace your medical treatment. But there is not good evidence that they work or that they are safe.
Medicines that you get from your doctor go through a lot of tests before they can be prescribed. These tests check:
- The medicine is safe
- The medicine works
- What the side effects of the medicine are
- If it is safe to take the medicine when you have other conditions or take other medicines
Alternative therapies are not tested in the same way. So it is possible that some work. But there is no strong evidence that they do, or that they are safe.
What about food supplements and vitamins?
When you have cirrhosis you may find that you have trouble absorbing all of the vitamins and minerals in your diet.
However, a wide variety of dietary supplements may cause damage to the liver. For example, supplements containing vitamin A, green tea extract, kava (often taken for anxiety or insomnia), conjugated linoleic acid supplements (sometimes used for slimming), noni juice have all been reported as causing liver damage.
It is therefore important to discuss with your doctor or registered dietitian before taking any dietary supplements.
Milk Thistle
Some people think that milk thistle can help with liver conditions.
There has been some research into this. But the studies did not find enough evidence to say that milk thistle works.
Milk thistle can cause side effects such as tummy problems, itching and headaches. These usually go away quickly when you stop taking the milk thistle. But you might be more at risk of problems if you have a liver condition.
Milk thistle cannot be used instead of medicine from your doctor. It can also be dangerous if you take some other medicines. This includes some immunosuppressants and some treatments for liver disease and diabetes.
You should always talk to your doctor before trying it if you have a liver condition. You should not take milk thistle if you are pregnant or breast feeding.
How to find good information in person and online
Who can I ask for expert advice on alternative and complementary therapies?
If you have a liver condition, always talk to your doctor before trying alternative and complementary medicines. Your doctor will have your medical history. And information about other medicines you take. They will be able to help you decide if it is safe for you to try a treatment.
This is important even if the medicine was given to you by someone working as an expert in that type of medicine.
Some types of healthcare professional are carefully regulated. This includes doctors, nurses and dietitians. And some other types of healthcare professional that you find in the NHS. They must have done a lot of training. They are also registered.
Complementary and alternative medicine practitioners are not regulated. Anyone can call themselves an expert. For example, a naturopath, nutritionist, nutritional therapist, homeopath, herbalist, or Chinese herbalist. There are also no regulations about how much training they must have done or how good this training is.
This means that they are unlikely to fully understand your liver condition. Or how different conditions and medicines can affect each other.
If your liver is working normally, always check with a pharmacist before taking any new medicines. They can tell you if it is known to affect any other medicines.
How can I find good information online?
There is a huge amount of information online about alternative and complementary therapies. People selling or promoting a particular treatment can be very convincing. They might list lots of evidence that they say proves the treatment works. Or they might have lots of quotes from happy customers.
It is always a good idea to be cautious about this sort of information. Especially if it comes from someone who is trying to sell you something.
They might be showing you evidence from one very small study that said something works. But ignoring many more much better studies that show it does not.
You also cannot be sure that quotes from happy customers or online ratings are real. And unfortunately, even if something has worked for someone else, that does not mean it will work for you. It might not even be safe.
Can I get advice from online forums?
Online forums and groups can be a great way to meet people with similar experiences. You can find out more about The British Liver Trust forum here .
Suggestions for complementary and alternative treatments are usually well meant. But you should never take medical advice from strangers on the internet.
How can I deal with suggestions from friends and family?
Friends and family often make suggestions for treatments. This might be based on something they read. Or on something that has worked for someone they know. This advice is well meant but it is important to be careful about it.
As with online information, the suggested treatment might not work or be safe for you. Having a liver condition means you need to be even more careful about which medicines you take. The person making the suggestion might not understand this.
Occasionally someone can be very persistent in sending you unwanted advice. If this happens it might help to share this page with them.
More information from The British Liver Trust



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Special thanks
We would like to thank The British Liver Trust nurse team for their input and advice. And our clinical reviewer, Professor Stephen Ryder, consultant hepatologist at Nottingham University Hospitals NHS trust.
Published: August 24th 2023
Review due: August 24th 2026