Frequently asked questions

Your questions, answered simply and clearly.

This section is designed to help you quickly find clear, accurate information about Biosister Vitamin Care. We’ve grouped the most common questions below to make navigating our products, ingredients, and policies as straightforward as possible.

If you can’t find what you’re looking for, we're always happy to help.

About the probiotic

What it supports, how to take it, and what women often want to know before adding it to their routine.

Why did you create this probiotic?

Biosisters was created from the belief that women deserve better support for the health issues we quietly deal with every day. Our goal is to create thoughtful supplements and a community where women can learn from and support one another.

Who is this probiotic for?

This probiotic is for women who for women who want to maintain a healthy balance bacteria in their vagina and gut. Our vaginal probiotic is safe for ages 18 and up.

Whether something feels off or you’re just being more intentional about your health, it’s designed to support you consistently.

What is a vaginal probiotic?

A vaginal probiotic is a supplement designed to support the balance of good bacteria in your body, especially as it relates to vaginal and gut health.* Your microbiome plays a role in things like pH balance, digestion, and overall comfort. A probiotic helps support that balance.

What does this probiotic actually help with?

Our probiotic is designed to support vaginal health by helping maintain a healthy balance of bacteria. Women often take it to help with recurring odor, pH imbalance, and overall vaginal comfort. Many women also notice benefits in digestion since gut health and vaginal health are closely connected.*

Could vaginal probiotics affect my menstrual cycle?

Vaginal probiotics are designed to support the balance of bacteria in your body, not to directly change your menstrual cycle. Everyone’s body is different, so if you notice any changes or have concerns, it’s always a good idea to check in with your healthcare provider.

Can I take this with other supplements?

In most cases, yes. Probiotics are commonly taken alongside other vitamins and supplements. If you have specific health concerns or take prescription medications, it's always a good idea to check with your healthcare provider.

What does 50 billion CFU mean?

CFU stands for colony forming units, which measures the amount of live probiotic bacteria in a serving. The 50 billion CFU in this formula helps deliver a meaningful amount of beneficial bacteria to support the body's microbiome.

How long before I notice a difference?

Every body is different, but many women begin noticing changes within a few weeks of consistent daily use. Supporting your microbiome takes time, so we recommend taking it daily for at least 30 days before evaluating how it's working for you.

What is MAKTREK® Bi-Pass technology?

MAKTREK® Bi-Pass technology helps protect probiotic strains as they move through the digestive system so more of the beneficial bacteria survive and reach where they're needed.

What makes Biosisters different?

Biosisters was created from real conversations between women who were paying attention to their bodies and wanted something they could trust.

Everything we offer reflects how we care for ourselves and each other—thoughtful, intentional. Something we're proud to stand behind.

Ingredients & Safety

A closer look at the probiotic strains and ingredients used in our formula

What's in the formula?

Each serving contains 50 billion CFU of probiotic bacteria using MAKTREK® Bi-Pass technology to help protect the probiotics as they move through the digestive system.* The formula includes five probiotic strains: Lactobacillus acidophilus, Lactobacillus plantarum, Lactobacillus rhamnosus, Lactobacillus fermentum, Lactobacillus reuteri. It also includes marine polysaccharide (Ascophyllum nodosum) to support the probiotic blend.

What's not in the ingredients

No artificial colors. No artificial flavors. No added sugars or sodium. No allergens.

Why are these ingredients used?

Each ingredient in the formula serves a purpose. The probiotic strains support vaginal and digestive health, while the supporting ingredients help protect the probiotics so they remain effective through manufacturing.*

Can I take this probiotic with other supplements?

Consult your physician before taking if you have a medical condition, or are taking any medications. Keep out of reach of children. Do not use if cap seal is broken or missing.

Delivery & Returns

For hygiene and safety reasons, we’re not able to accept returns on opened products. If there’s an issue with your order, reach out to us and we’ll make it right.

How long does delivery take?

Delivery times vary depending on your location. Most orders arrive within 5-7 business days, and you’ll receive tracking once your order ships.

How much does delivery cost?

Delivery costs are calculated at checkout based on your location and shipping method.

Will I receive tracking information?

Yes. Once your order ships, you’ll receive tracking details so you can follow your delivery.

Do you offer international shipping?

Yes, we offer international shipping to select locations. Shipping rates and delivery times will be shown at checkout.