What it is
Hai Zao, derived from Sargassum seaweed, is a mineral-rich supplement primarily used in Traditional Chinese Medicine. It is recognized for its significant iodine content, crucial for thyroid hormone synthesis.
Supplement · Mineral
Hai Zao (Sargassum)
500 mg · vegan · gluten-free · 90 caps
hypothyroidismhormonal imbalancethyroid-nodules thyroid glandreproductive system
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How it works
It provides essential iodine to support the production of thyroid hormones T3 and T4. Additionally, its polysaccharides are believed to help break down phlegm and reduce the size of thyroid nodules and goiters.
Who should take it
Adults looking to address hormonal imbalance, low libido, irregular cycles. Particularly relevant for people who prefer a targeted single ingredient and who have ruled out an underlying condition that needs medical care first.
Avoid / careful
Pregnant or nursing women without clinician oversight. People on prescription medication affecting the same pathway should consult a doctor before combining. Side effects are uncommon at recommended doses but mild GI upset can occur when starting.
When to take it
Morning
Noon
Evening
Night
How to take it
With food
Empty stomach
Before food
FAQs
Frequently asked
Can Hai Zao help with hyperthyroidism?
Hai Zao is primarily indicated for hypothyroidism due to its iodine content. It is not recommended for hyperthyroidism as excess iodine can exacerbate the condition.
How long does it take to see results?
Hormonal shifts and noticeable effects typically occur within 4 to 12 weeks of consistent daily use.
Can I take Hai Zao with my thyroid medication?
Consult your doctor before combining Hai Zao with prescription thyroid medication to ensure proper dosage and avoid interactions.
Research
6 studies · 2010–2024
Evidence grade
ABCD
C · C · emerging-to-moderate human evidence for hormonal balance
From the blog
Editorial notes
SacredBod's longer take on Hai Zao (Sargassum) — context the structured blocks above don't capture.
About Hai Zao (Sargassum)
Hai Zao (Sargassum) is a mineral supplement used to support hormonal balance. Sargassum seaweed for thyroid and phlegm masses. It is available in capsule form and dosed for adults in India and internationally. As a tcm-tradition entry in the SacredBod catalog, it is positioned as a single-ingredient option that can be used on its own or layered into a broader protocol. Hai Zao (Sargassum) works through the mechanisms characteristic of its class — see the mechanism and research sections for detail. It primarily acts on the endocrine system, thyroid, reproductive system, and effects are dose-dependent, typically becoming measurable within 4-12 weeks for hormonal shifts. Consistency matters more than dose size for this category.
Evidence
Hai Zao (Sargassum) carries an evidence grade of C in the SacredBod catalog, reflecting emerging human evidence for hormonal balance. Sargassum seaweed for thyroid and phlegm masses. Benefits are cumulative rather than immediate, typically becoming noticeable within 4-12 weeks for hormonal shifts, and individual response varies.
Dosing
A typical dose is 500 mg, taken with food, usually in the morning. Start at the lower end, assess tolerance, and stay consistent; more is not automatically better.
Cautions
Pregnant or nursing women without clinician oversight. People on prescription medication affecting the same pathway should consult a doctor before combining. Side effects are uncommon at recommended doses but mild GI upset can occur when starting.
Who it’s for
Adults looking to address hormonal imbalance, low libido, irregular cycles. Particularly relevant for people who prefer a targeted single ingredient and who have ruled out an underlying condition that needs medical care first.
As part of the Mineral category, Hai Zao (Sargassum) can be used on its own or layered into a broader protocol — see the Goes with panel for evidence-aligned pairings.
Added to your stack.