A review of many studies into the benefits of kelp extracts on your skin found that brown algae have a number of dermatological uses. Creams and topical applications containing algae extract can help treat eczema, skin infections, and protect the skin from cellular damage. (32)
Precautions and Side Effects
Although kelp dietary supplements have many benefits for your health, there are a few precautions you should be aware of.
Effect on thyroid function
Kelp powder benefits thyroid function if an iodine deficiency results in hypothyroidism. However, taking too much sea kelp could result in an iodine overdose.
Regarding the safe use of kelp supplements, scientists say that it’s important to pay attention to their iodine content. For example, some kelp supplements contain 225 mcg iodine which is 150% of the recommended daily intake. (33)
Also, taking too much kelp could result in hyperthyroidism because the iodine content of kelp overstimulates the thyroid gland. (34)
Arsenic content
High dosage of kelp supplements could also lead to arsenic poisoning. Researchers have found that kelp extracts can contain levels of arsenic.
However, kelp contains inorganic arsenic which is judged to be less-toxic than organic arsenic. According to the European Pharmacopoeia Commission, up to 90 ppm arsenic in kelp is allowable in medicinal products. (33)
Heavy metal content
Because kelp absorbs minerals and nutrients from the sea, it can also absorb heavy metals if it grows in polluted waters.
A study of 426 samples of seaweed sold in one Asian country found traces of lead, arsenic, mercury, and cadmium. However, researchers said that there is a low probability of toxicity from seaweed consumption if taken in the recommended dosages. (35)
The Best Kelp Supplements
As kelp can absorb heavy metals, you should look for kelp supplements that are purified. Also, look for high-quality seaweed supplements that are from clean waters.
You can also buy in health stores and online stores organic kelp tablets or powder that is free from toxic substances.
How to Consume Kelp
You can consume raw, cooked or dried kelp. If you consume fresh kelp, make sure to rinse it well. Apart from taking kelp supplements, you can add kelp powder or flakes to your food.
For example, you could add dried kelp powder to soups, on salads, or in your favorite smoothies.
You can buy kelp flakes or dried kelp online or in Asian stores and sprinkle on your food to season it.
Related articles:
How to Detox from Heavy Metals & Powerful Detox Smoothie
Top 13 Signs That You May Have a Thyroid Disorder
The Most Common Thyroid Disorders and What You Need to Know
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