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Thompson's Kelp 1400 One-A-Day


  • 60 tablets

    RRP: NZ$19.90

    You save 17% (NZ$3.40)

  • 120 tablets

    RRP: NZ$33.70

    You save 17% (NZ$5.80)

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Thompson’s One-A-Day Kelp 1400 is a high potency convenient one-a-day source of nutrients, in particular, Iodine. An important trace mineral, Iodine is necessary for the production of thyroid hormones, which play a vital role in healthy metabolism.

The Kelp used in Thompson’s One-A-Day Kelp 1400 is harvested from the deep, clean waters of the Atlantic Ocean. Thompson’s ensures that the dried raw herb is thoroughly screened for pesticide residues, heavy metals, aflatoxin and micro-organism contamination prior to extraction. Thompson’s have used a specific variety of Kelp called Bladderwrack (Fucus vesiculosus). Because of the ability of Bladderwrack to accumulate minerals, it is high in a variety of trace minerals and is one of the best natural sources of Iodine. Iodine is a trace element and is an integral part of thyroxine, a principal hormone produced by the thyroid gland. Thyroid hormones are necessary for maintaining normal metabolism in all cells of the body. Due to decreased consumption of iodised table salt, more people are likely to be susceptible to iodine deficiency and consequently suffer thyroid dysfunction. Through regulation of thyroid function Bladderwrack may increase basal metabolic rate and, by assisting with metabolism, help maintain a healthy weight.
Indications for Use:
As a rich source of Iodine, Kelp can have a powerful effect on the thyroid gland and, thus, on metabolism in general and the metabolism of fats in particular.

Bladderwrack’s actions as an anti-obesic; demulcent; and thyroid balancer may make it useful for the following: under active thyroid; weight management (in case of thyroid dysfunction); bowel irregularities; and digestion difficulties.


Adults - take one tablet daily (with food) or as professionally prescribed.


Not to be used in hypertension or during pregnancy or with orthodox thyroid medication unless under the supervision of a qualified practitioner. Kelp is best avoided in cases of an overactive thyroid.

Each Tablet Contains:

Kelp (Fucus vesiculosus) whole plant 1.4gm
supplying Iodine 280mcg


There are a variety of health concerns that Thompson's products may be able to assist with, such as General Energy and Vitality, Healthy Aging, Stress Management and Children’s Health.

Junior Immunofort is a popular immune boosting formula that children love. It is packed full of vitamins, minerals and nutrients that may help support their overall health. 

Thompson's Grape Seed 19,000 tablets are rich with antioxidants like proanthocyanidins, which may protect cells from rogue free radical damage.

Thompson's is an established market leader in New Zealand, and now proudly exports its products internationally.

Your satisfaction is of paramount importance to us! If we can help in any way please contact us using the details below.

Email: [email protected]

New Zealand Free Phone: 0800 148 148

Other Countries Phone: +64 3 524 8414

Live Chat: Between the hours of 9.30am – 4pm

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We also highly recommend reading product reviews. They can be a great way of finding out that little bit extra about products you're interested in.

We publish all helpful customer reviews, including negative reviews - these are genuine!

Customer Reviews

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Thompson's Kelp 1400 One-A-Day. Review by

I'm really thankful for this product as now it has allowed me to come off the Dr's prescribed treatment for an under active thyroid & has enabled my thyroid function to come into the normal range (just). My Dr. is happy about this & continues to monitor it with yearly blood tests.

A good all rounder Review by

This is a great addition to my daily vitamin intake - I've noticed a marked improvement in energy and stamina since taking it. A good all rounder and easy to swallow.

Great product, would recommend Review by

This product really helps with day to day living, keeps my blood sugar levels balanced and have noticed it gives me a good sense of wellbeing. Great for 'that time of the month' and also when doing strenuous exercise.

Very good for thyroid treatment Review by

My husband was told by a specialist that he should take a Kelp tablet every day to prevent his thyroid from producing fluid which then formed a lump which needed to be drained. He has taken kelp every day for a few months and has had no more lumps and no more problems. I take a kelp tablet every day myself as I believe in this product to keep my thyroid normal.

thyroid treatment Review by

I have been taking 'one a day' for about two years or more. After a diagnosis of thyroid nodules the hospital consultant gave me the options of having my thyroid removed,or zatted and pills for the rest of my life. He didn't advice me taking kelp or iodine, in fact he gave me very low dosage pills that inhibited iodine in preparation for a thyroid removal. I decided to continue with Thompsons kelp and discarded the prescription pills after about 6 months and my thyroid recovered. So now I religiously take one a day. I like the fact that Thompsons claim their kelp is screened for toxins.

Great Product Review by

Didn't realise how much it was helping until I ran out.... Now I want, no, Need more!! :o)

Thompsons kelp is THE BEST! I now n... Review by

Thompsons kelp is THE BEST! I now no longer need medication to support thyroid problems, a huge plus for me.

I have been taking these for 4 mont... Review by

I have been taking these for 4 months now on the recommendation of my naturopath (along with a better multivitamin). I have more energy and i am not thoroughly exhausted or getting sick every few weeks as a result of my terrible job. I have also lost weight. Brilliant product.

I noticed an increase in mental ale... Review by

I noticed an increase in mental alertness and stamina about a week or so after taking these so will keep doing so. Great product for a great price and as always HealthPost top service and delivery.

My naturopath suggested I tried the... Review by

My naturopath suggested I tried these to imporve my brain fog, general lethargy and poor sleep patterns. Over three months all problems have significantly reduced, especially my general brain function! I feel I can cope in my job, have more energy and initiative and wake up feeling refreshed and alert. I will keep taking these once a day.

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Product Highlights

  -  Nutrition From The Sea



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