Frequently asked questions

Matterdays - Frequently Asked Questions

SNIFFING OUT THE DETAILS
Why choose Matterdays?

Because every extra day with your pet matters.

Matterdays is built around science-backed nutrition, veterinary expertise, and thoughtful design — giving you a simple, trustworthy way to support your pet’s longevity every single day.

What makes Matterdays different from other supplements?

Most supplements are one-size-fits-all or focus on a single issue. Matterdays is different:

  • Vet-led — formulated with holistic veterinarian Dr. Jenna Lenarz-Salcedo
  • Science-backed — every ingredient is clinically studied and used with intention
  • All-in-one — supports multiple longevity pathways in one daily scoop
  • Consistency-first — designed to be easy enough to actually use long-term
MD1 — Daily Longevity Formula
What does MD1 do?

MD1 is a daily powdered longevity supplement designed to support:


  • Cellular vitality and antioxidant defense

  • Gut health and digestion

  • Joint comfort and mobility

  • Immune, heart, and cognitive support as pets age

Rather than targeting one symptom, MD1 supports the systems that help pets stay healthier for longer.

Is MD1 safe for both dogs and cats?

Yes. Matterdays offers species-specific formulations designed to meet the unique needs of dogs and cats, using vet-reviewed ingredients you can trust.

At what age can pets start MD1?

MD1 can be introduced from around 16 weeks of age and is suitable for adult and senior pets.

Starting earlier helps build a stronger foundation; continuing later helps support healthy aging.

How long before I see results?

Some pet parents notice changes in energy, coat, digestion, or mobility within a few weeks.

That said, longevity is a long game — MD1 works best when used consistently over time.

What if I miss a day?

No problem. Just resume your normal routine the next day.

MD1 works best as a habit, not something you have to be perfect about.

Can MD1 be used with other supplements or medications?

MD1 is formulated to be gentle and compatible, but if your pet is on medication or has a medical condition, we recommend checking with your veterinarian before combining supplements.

How do I know if my pet needs MD1?

If you care about prevention — not just reacting when something goes wrong — MD1 is for you.

It’s equally useful for pets showing early signs of aging and for those who seem “fine” but deserve proactive support.

How much MD1 do I give my pet, and how do I serve it?

Simply mix the daily scoop into your pet’s food.

For exact dosing based on your pet, visit begin.md, our quick-start dosing guide.

Is MD1 third-party tested?

Yes. Every batch is third-party tested for quality and safety, including heavy metals, pesticides, and other common contaminants.

Where is MD1 manufactured?

MD1 is produced in the United States by a trusted manufacturer operating under strict quality and safety standards, with veterinary oversight throughout formulation and production.

Is Matterdays a medication or treatment?

No. Matterdays is a daily supplement designed to support overall health and longevity.

It is not intended to diagnose, treat, cure, or prevent disease.

Does MD1 contain fillers or artificial ingredients?

No artificial flavors, colors, or unnecessary fillers.

Every ingredient in MD1 serves a functional purpose.

Why is Matterdays offered as a subscription?

Longevity only works if it’s consistent.

Subscriptions help remove friction, ensure your pet never runs out, and make daily care effortless.

You can pause or cancel anytime.