Mycosyn Review: Ingredients, Safety Flags and Price

Updated 2026-10-08 · Earthmend Editorial Team

Disclosure: some links on this page are affiliate links. If you buy through them we may earn a commission, at no extra cost to you. This content is for information only and is not medical advice — talk to your doctor before starting any supplement.

Quick verdict: Mycosyn is a capsule supplement listing horsetail, saw palmetto, fo-ti, spirulina, biotin and vitamins. One bottle is $69. The list is incomplete, doses are missing, and fo-ti carries liver-safety concerns worth discussing with a doctor.

Mycosyn is marketed for people who want healthier-looking toenails without applying anything to the foot. Its ingredient mix looks more like a hair-skin-nails formula than an antifungal. This page sets out what the official website lists and what independent sources say.

What is Mycosyn?

Mycosyn is a dietary supplement in capsule form. According to the official website, every capsule is made in the USA. The sales page links Mycosyn to toenail fungus, odor and itching, and describes the author as someone who works at a dermatology clinic, without naming a medical license.

What ingredients are in Mycosyn?

According to the official website, Mycosyn contains "horsetail, saw palmetto, fo-ti, spirulina, vitamin C, folate, biotin, alfalfa, barley grass and more." The words "and more" mean the list is not complete, and no doses are given.

Does biotin in Mycosyn help nails?

Biotin is the ingredient most often linked to nail health. The NIH Office of Dietary Supplements notes that a few small studies looked at biotin for brittle nails, but the evidence is limited and true biotin deficiency is rare. Biotin is not an antifungal.

An important safety point: high-dose biotin can interfere with some lab tests, including certain thyroid and heart (troponin) tests, as both the ODS and the FDA have pointed out. Tell your doctor and lab before blood work if you take Mycosyn or any biotin supplement.

What about fo-ti, saw palmetto and horsetail in Mycosyn?

Fo-ti (He Shou Wu) is a traditional Chinese herb. Cases of liver injury linked to fo-ti products are described in the NIH LiverTox database. Anyone with liver disease, or anyone who drinks heavily or takes medicines processed by the liver, should talk to a doctor before taking a product that contains fo-ti.

Saw palmetto is mostly studied for prostate symptoms. NCCIH reports that it did not beat placebo in larger trials for those symptoms. There is no good evidence it affects nail fungus.

Horsetail contains silica, which is why it shows up in hair and nail products. Good human evidence for nail benefits is lacking.

Spirulina, barley grass and alfalfa are nutrient-dense greens. They add vitamins and minerals but are not antifungal treatments.

How much does Mycosyn cost?

The Mycosyn page states a 30-day supply for a one-time fee of $69. Package prices for 3 and 6 bottles are blank in the text, so we could not verify them. Check the current price on the official website.

• Free shipping is stated on orders placed that day, shipped discreetly.
• International orders pay shipping fees under a separate policy.

Check Mycosyn prices on the official website

Does Mycosyn come with a guarantee?

The Mycosyn page links to a refund policy, but the guarantee length is not stated in the text we read. Read that policy and confirm at checkout.

Who should avoid Mycosyn?

• Pregnant or nursing women, and anyone under 18.
• People with liver disease or on liver-processed medicines (fo-ti concern).
• People on hormone-related medicines (saw palmetto is studied for hormone-related prostate symptoms).
• People on blood thinners: alfalfa contains vitamin K, which can affect warfarin.
• Anyone scheduled for blood tests (biotin interference).

The official page also tells pregnant or nursing people, people on medication and people with medical conditions to consult a physician.

Can Mycosyn replace a doctor's care for nail fungus?

No. Mycosyn is a supplement. Prescription antifungal treatments exist, and they work best after a doctor or podiatrist confirms the diagnosis, since nail psoriasis and injuries can look the same, according to the American Academy of Dermatology. See our treatment options guide.

Mycosyn pros and cons

Pros

• Single-bottle price ($69) stated in text.
• Includes familiar nail-related nutrients such as biotin and vitamin C.
• Free shipping stated.

Cons

• Incomplete ingredient list ("and more") with no doses.
• Fo-ti and biotin bring real safety and lab-test considerations.
• Guarantee and multi-bottle prices not stated in text.
• Facility wording on the sales page cannot be verified, and the FDA does not approve supplements.

How should you take Mycosyn if your doctor agrees?

Follow the Mycosyn bottle label for the dose; the sales page does not state one in text. A careful approach:

1. Show the label to your pharmacist and list every medicine you take.
2. Start Mycosyn on its own, without adding other new supplements at the same time.
3. Tell your lab about biotin before any blood test.
4. Stop and call a doctor if you notice yellow skin or eyes, dark urine, unusual tiredness or stomach pain, which can be signs of liver stress.
5. Photograph your nails monthly; changes take months to show.

What questions should you ask Mycosyn support?

Ask for the complete ingredient list with doses (the page says "and more"), the refund window in days, and the prices for 3 and 6 bottles. Without the full label, it is hard to judge safety.

How does Mycosyn compare with Keravita Pro?

Mycosyn and Keravita Pro use near-identical sales pages and the same $69 single-bottle price, but different ingredient lists. Read Keravita Pro vs Mycosyn to see which profile each may suit. For context on which natural ingredients have any research, read natural remedies for toenail fungus.

Visit the official Mycosyn website

Sources consulted: ods.od.nih.gov, ncbi.nlm.nih.gov, nccih.nih.gov, aad.org.