A once-a-day liquid with methylene blue, zinc and potassium, positioned to support memory, focus and mental clarity alongside healthy daily habits. See what is in it, what to expect and who should check with a doctor first.

A liquid you add to a glass of water once a day.

Methylene blue, zinc and potassium.

Made in the USA per the supplied badge.

Produced under quality and purity standards.

Try it with our money-back guarantee.

Cognivex combines methylene blue with zinc and potassium in a liquid taken once a day, usually diluted in a glass of water.
It is a dietary supplement, not a drug, and it is meant to complement sleep, nutrition, movement and regular checkups. Amounts are not published on the seller’s page, so check the label on your bottle.
A simple three-step routine. It is a supplement meant to complement healthy habits, not a quick fix.

Use the dropper as the label directs and dilute in a glass of water. Never exceed the label serving.
Take it once a day as part of a routine. Supplements are meant for steady use and results vary.
Pair it with sleep, balanced meals, movement and mental activity, which do most of the work.
Individual results vary. Not a substitute for healthy habits or medical care.
Positioned to support your everyday recall alongside good sleep and learning.
A daily habit meant to sit alongside rest, hydration and regular meals.
Meant to complement stress management, nutrition and activity.
Shipping is free on every package per the seller. For steady, long-term use the 6-bottle option has the lowest per-bottle price.
Prices shown are offers at time of writing. Confirm your final total at checkout. One-time purchase, no auto-renewal per the seller.
A blue compound with a long medical history. Important interaction warnings apply.
Read moreIndividual results vary. These reflect personal experiences.

Easy to stay consistent with. I add the drops to my water in the morning and carry on with my day.

I like seeing the ingredients named, so I know what I am taking.

A simple addition to my day. It fits in with my walks, my puzzles and a regular bedtime.

Cognivex is a liquid drops dietary supplement in a 1 fl oz (30 mL) bottle, positioned to support memory, focus and mental clarity alongside sleep, nutrition and activity.
Cognivex is taken in drops, usually diluted in a glass of water once a day. Serving sizes differ between sellers, so follow the directions printed on your bottle and never exceed the label serving.
The seller names methylene blue, zinc and potassium, without amounts. Check the Supplement Facts panel on your bottle.
No, not always. Methylene blue can interact with antidepressants and other medicines that affect serotonin (SSRIs, SNRIs, tricyclics, MAOIs). Check with a physician first, especially if you take any prescription medication.
People with G6PD deficiency, anyone pregnant or nursing, and anyone under 18 should not use it. Ask a healthcare professional if you have any medical condition.
No supplement can promise that. Cognivex is a dietary supplement meant to complement sleep, nutrition, activity and a healthy lifestyle, and it is not a treatment for memory loss or any condition.
Orders are covered by a 60-day money-back guarantee, subject to the return terms shown at checkout. See our refund policy for details.
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