FAQs

What are polyphenols, and why are they important?

Polyphenols are plant compounds found in fruits, vegetables, herbs, and teas. Your gut microbes metabolize them into smaller compounds your body can absorb, which is how much of their effect on brain, heart, and digestive health is thought to work. Most people don't eat enough polyphenol-rich food daily, which is why we concentrate them into products. There's more in the Science section.

Do your products replace eating fruits and vegetables?

No. They can help fill a gap if you're not hitting five servings a day, but whole plant foods do things a supplement can't. Diet also affects how well polyphenols work: the gut bacteria that metabolize them are more abundant in people who already eat a plant-forward diet, so these products complement that diet rather than substitute for it.

How should I take the products?

Most are best taken once daily with a meal, which improves absorption. You can combine them with other supplements you take. If you have a medical condition or take prescription medication, check with your healthcare provider first.

Do I need to refrigerate the products?

No. Polyphenols degrade with light and heat, so store the capsules and powders somewhere dark and cool. The same goes for the olive oil: keep it capped, away from the stove, and out of direct light. Refrigeration isn't necessary for anything we sell.

How soon will I notice benefits?

Polyphenols and fiber work gradually, largely through your gut microbiome, and they don't produce a reliable day-to-day sensation the way caffeine does. The research behind these compounds measures outcomes over months of consistent intake, not days. Take them daily, take them with food, and treat them as part of your diet rather than something you expect to feel.

Are Mayer Nutrition products natural and allergen-free?

We source our polyphenols from real plants and avoid unnecessary fillers and artificial additives. Our products are non-GMO, gluten-free, vegan, soy-free, and dairy-free. Our supplements are produced in FDA-registered facilities operating under current Good Manufacturing Practices. Our extra virgin olive oil is pressed at a single estate in Le Marche, Italy, and third-party verified for polyphenol content.

Can I cancel a subscription?

Yes, at any time, from your account portal or the link in any subscription email. Cancellation is immediate and there's no minimum number of orders. You can also skip, pause, or reschedule a shipment from the same place.

What if something isn't right with my order?

If it arrives damaged, incorrect, or not as described, email hello@mayernutrition.com within 7 days and we'll replace or refund it. For anything else, write to us within 30 days of delivery with your order number and what happened, and we'll work it out. Full details are on our Returns & Shipping page.

Do you ship internationally?

We ship within the United States and to select international destinations, which are shown at checkout. Free shipping applies to domestic orders over $100 and doesn't extend to international orders, including international subscription orders. Customs duties, taxes, and import fees are the recipient's responsibility.

Any other questions?

Email hello@mayernutrition.com

These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure, or prevent any disease.