Would you prioritize a three-capsule routine with ten disclosed active compounds, or a two-capsule formula with iodine and botanicals? Our Core Axis vs. Pure Encapsulations thyroid supplements comparison offers another example of reading ingredient forms and serving sizes side by side. Here, the Core Axis and Designs for Health thyroid supplements differ most in their ingredient mix, daily serving, and available quality documentation.
Both products are dietary supplements, not replacements for prescribed thyroid care. Our protocol costs $74.95 for a 30-day supply; Thyroid Synergy comes in a 120-capsule bottle, with its serving directions calling for two capsules daily. The practical choice depends on which ingredients and routine suit your needs, and on medication timing. Our mineral-containing protocol calls for four hours of separation from thyroid medication; review your schedule with your prescriber or pharmacist.
Quick comparison of formula, serving, and documentation
The label differences are concrete, but they do not establish that one formula is right for everyone. Use the same criteria for each product, then check the current label and price before purchasing.
| Criterion | Core Axis Thyroid Support | Thyroid Synergy by Designs for Health |
|---|---|---|
| Supply and price | 90 capsules, a 30-day supply, $74.95 | 120 capsules, a 60-day supply at the label serving; current price depends on seller |
| Daily serving | Three capsules once daily with food | Two capsules daily with meals, or as directed by a healthcare practitioner |
| Formula highlights | Ten disclosed active compounds, including myo-inositol, selenium, zinc, vitamin D3, magnesium, and methylated folate and B12; 100 mcg selenium per daily serving; no iodine listed | Includes iodine, selenium, zinc, vitamin A, copper, chromium, manganese, N-acetyl-L-tyrosine, American ginseng, and forskolin; 50 mcg selenium and 100 mcg iodine per serving |
| Quality records | We publish certificates of analysis and test every lot for potency, identity, and contaminants; GMP verification by Eurofins | Designs for Health’s certificate directory lists a product-specific Thyroid Synergy certificate |
| Medication timing | Our instructions call for four-hour separation from thyroid medication; confirm timing with your prescriber | Take with meals as directed; check medication timing with your clinician or pharmacist |
Core Axis Thyroid Support

Best for: Readers who want a clearly disclosed formula, a stated direct price, and a once-daily serving schedule.
Core Axis Thyroid Support provides ten named active compounds in a 90-capsule, 30-day supply. Its label lists L-5-MTHF calcium for folate and methylcobalamin for vitamin B12, alongside myo-inositol, selenium, zinc, vitamin D3, vitamin B6, vitamin C, magnesium, and S-acetyl-glutathione. We publish the ingredient forms and doses, and certificates of analysis are available. The protocol is positioned as nutritional support, not as a substitute for medical evaluation or prescribed treatment.
Pros
- Every ingredient, form, dose, and role is disclosed, making label-to-label comparison more straightforward.
- We publish certificates of analysis and test each lot for potency, identity, and contaminants; GMP verification is by Eurofins.
- The $74.95 price covers a 30-day supply, with free US shipping, an included Hashimoto’s Protocol Guide, and a 60-day money-back guarantee.
Cons
- The three-capsule daily serving is one capsule more than Thyroid Synergy’s label serving.
- The formula does not list iodine, so it will not match a plan that specifically calls for an iodine-containing supplement.
Thyroid Synergy by Designs for Health
Best for: Readers who prefer a two-capsule daily serving and are comparing formulas that include iodine and botanical ingredients.
Thyroid Synergy’s published product information lists 11 active ingredients, including 100 mcg of iodine, 50 mcg of selenium, 25 mg of zinc, N-acetyl-L-tyrosine, American ginseng, and forskolin per two-capsule serving. A 120-capsule bottle provides 60 servings at that direction. The product page recommends taking it with meals or following a healthcare practitioner’s directions. Its product-specific certificate is another useful document to check when reviewing quality information.
Pros
- The label lists the ingredients and amounts, including iodine and several minerals and botanical extracts.
- Two capsules per day make its labeled serving smaller than Core Axis’s three-capsule routine.
- A product-specific certificate is listed in the company’s certificate directory.
Cons
- The formula includes iodine, which may not suit every clinician-directed supplement plan.
- The official product information does not establish a current direct-to-consumer price, so check the seller’s listing before comparing total cost.
How the formula differences matter in practice
The most consequential formula distinction may be iodine. Thyroid Synergy lists 100 mcg per serving, while iodine does not appear among the ten active compounds in our formula. That is a difference to discuss with your clinician, not an automatic advantage for either product. The American Thyroid Association’s supplement guidance cautions that excess iodine can be harmful to the thyroid and recommends discussing supplements with the clinician managing your care.
Selenium is another point where label amounts should not be confused with predicted results. Our daily serving lists 100 mcg, while Thyroid Synergy lists 50 mcg. The NIH Office of Dietary Supplements describes selenium’s role in thyroid hormone metabolism, while noting that studies of supplementation in autoimmune thyroiditis have had mixed results. A higher amount on a label is not, by itself, proof of better outcomes.
The formulas also differ in their B-vitamin and botanical profiles. Core Axis lists L-5-MTHF calcium and methylcobalamin; Thyroid Synergy lists riboflavin and includes American ginseng and forskolin. If you already use a multivitamin or a separate iodine, selenium, or B-vitamin product, compare the combined daily amounts rather than evaluating either bottle in isolation.
What to check before choosing
Before buying, compare the full Supplement Facts panels, not just the front-label claims. Check the serving size, number of servings, ingredient forms, and amounts per daily serving. Then look for a certificate that identifies the product and lot you are reviewing. We publish lot-level certificates and test every lot for potency, identity, and contaminants; Designs for Health’s directory lists a product-specific certificate as well.
Quality documents are useful evidence about a product’s testing, but they are not FDA approval. The FDA explains that dietary supplements are not approved by the agency for safety and effectiveness before they are marketed, and advises consumers to discuss supplements with a healthcare professional. If you take levothyroxine or another thyroid medicine, confirm the timing for the complete formula with your prescriber or pharmacist. The four-hour separation instruction applies to our mineral-containing protocol; do not assume another product has identical directions.
Which thyroid supplement is the better fit?
The thyroid supplement comparison favors Core Axis for readers who value a disclosed ten-compound formula, published lot documentation, and a stated $74.95 monthly price. Thyroid Synergy offers a two-capsule serving and a different mix that includes iodine and botanicals. Compare the exact labels, current seller pricing, and medication instructions with your healthcare professional before deciding.
Explore our thyroid support protocol
If a clearly itemized formula and a defined daily routine are priorities, review our protocol details alongside the other product label. The information includes ingredient forms and amounts so you can discuss the formula with your healthcare professional.

Our 90-capsule supply is priced at $74.95 for 30 days and is taken as three capsules once daily with food. It includes ten disclosed active compounds, the Hashimoto’s Protocol Guide, free US shipping, pause-or-cancel flexibility, and a 60-day money-back guarantee. Core Axis thyroid support is a dietary supplement and does not replace prescribed care.
Frequently Asked Questions
Can I choose based on capsules per day alone?
No. Capsule count is one convenience factor, but ingredient forms, amounts, price, and fit with your clinician’s advice also matter.
Does Thyroid Synergy include iodine?
Yes, its published formula includes iodine. If you have been advised to monitor iodine intake, review the label with your healthcare professional.
Should either supplement replace levothyroxine?
No. These products are dietary supplements, not substitutes for prescribed thyroid medication or medical care.
Do the two formulas use the same ingredients?
No. They share some nutrients, including selenium and zinc, but their broader ingredient profiles differ. Compare each current product label before combining either with other supplements.
What should I look for in a certificate of analysis?
Check that the document identifies the product and the lot you are considering, and read what the analysis covers. A certificate is one part of quality review, not a replacement for clinician advice about whether a formula suits you.
