Omega 3 Fatty Acid Supplements and Autism Ranking: Insufficient/Mixed evidence

Cost and Time


The cost of buying omega-3 supplements depends on a range of factors including the type of supplement, the quantity you buy, the supplier, delivery charges etc.

We found a wide range of suppliers providing omega-3 supplements for a wide range of prices when we did an online search on 9 May 2018. Prices varied from £2.87 for 120 tablets to £75 for 250 tablets.   

In the UK, it is sometimes possible to obtain free NHS prescriptions for specific dietary supplements if you have certain medical conditions (such as diabetes) or you are a member of an exempt group (such as being under 16 or over 65).   


The amount of time it takes to use omega-3 supplements will depend on a number of factors including the overall length of treatment, the frequency of treatments and the time taken to administer a single dose, as well as the needs of the person undertaking it.

Most omega-3 supplements are designed to be taken once or twice a day, often before mealtimes.

Some researchers suggest that daily omega-3 supplements should be taken for at least 3 months for full effects to be seen. Daily supplementation is generally quick and easy but young children are often reluctant to take supplements.

We would strongly recommend that you review your use of dietary supplements on a regular basis with a responsible health professional such as a dietitian, GP or pharmacist. This is because you are likely to experience some harm if you take supplements in large amounts over long periods of time.

14 Dec 2018
Last Review
01 Dec 2018
Next Review
01 Dec 2021