Frequently Asked Questions

This product is for children aged 3 and up, with no added flavorings. Please follow the directions on the pack.

The Sun Stick (sweet orange) is the Morning Formula, with beta-glucan, EpiCor and vitamin C plus LGG and Bb-12, for the morning. The Moon Stick (cranberry) is the Evening Formula, with GABA, magnesium and zinc plus Bi-07 and HN001, for the evening.

Yes. The Sun Stick and Moon Stick are separate formulas; each can be taken on its own, or the two can be paired morning and evening.

We suggest 1-2 Sun Stick packs during the day and 1-2 Moon Stick packs in the evening. Adjust the amount based on your child's age and needs.

Yes. Take 1-2 stick packs at a time — they can be taken straight from the stick. The Sun Stick comes in sweet orange and the Moon Stick in cranberry, both flavors kids love. They can also be dissolved in 100 ml of warm water (below 40°C) and stirred until even. Avoid using water that is too hot.

No. The postbiotics (inactivated cultures) in the product are highly stable and tolerate heat and acid well. Simply store it sealed in a cool, dry place. The shelf life is 24 months.

The shelf life is 24 months. Please check the production date and expiry date printed on the packaging. Once a stick pack is opened, keep it sealed and consume it promptly.

This product is designed mainly for children. Pregnant or breastfeeding women who wish to take it should consult a doctor or dietitian first.

The ingredient list contains no common allergens such as milk, soy, wheat or nuts; the ingredient list and allergen statement on the pack are authoritative. If your child has a history of allergies, consult a doctor before use.

LGG (Lactobacillus rhamnosus GG) is a classic, widely studied strain of Lactobacillus rhamnosus. Each Soluna Doc Sun Stick contains 2.0×10⁹ CFU of LGG.

Bb-12 (Bifidobacterium animalis subsp. lactis Bb-12) is a widely used strain of B. animalis subsp. lactis, tolerant of acid and bile. Each Soluna Doc Sun Stick contains 2.0×10⁹ CFU of Bb-12.

EpiCor is a postbiotic ingredient developed by Cargill (USA), made by whole-cell fermentation of Saccharomyces cerevisiae followed by inactivation. It is heat- and acid-stable.

Gamma-aminobutyric acid (GABA) is a naturally occurring amino acid listed in China's catalogue of new food ingredients. The Soluna Doc Moon Stick contains GABA in line with those regulations; the product is for children aged 3 and up, taken as directed on the label.

Beta-glucans are a group of polysaccharides. The Soluna Doc Sun Stick contains yeast beta-glucan, which comes from the yeast cell wall.

Zinc and magnesium are essential minerals. In the Moon Stick, zinc is added as zinc citrate and magnesium as magnesium gluconate.

Postbiotics are preparations of inanimate microorganisms and/or their components that confer a health benefit on the host (formally defined by ISAPP, the International Scientific Association for Probiotics and Prebiotics, in 2021). Their core characteristic is that they are obtained by inactivating probiotics while retaining the biological activity of cell structures and metabolites, and they are heat-tolerant, acid-tolerant and highly stable.

Probiotics are live microorganisms that must stay alive through storage; postbiotics are inactivated microorganisms and their components, which do not need to stay alive. Postbiotics tolerate heat and acid and need no refrigeration, so they keep more stably in storage.

Inactivated probiotics are probiotic cells inactivated by heat or other processes. They keep structures such as the cell wall but can no longer multiply, and they are one kind of postbiotic.

"Three-in-one" means a single product contains probiotics (live beneficial microorganisms), prebiotics (such as fructo-oligosaccharides and stachyose) and postbiotics (inactivated microorganisms and their components). Every Soluna Doc stick contains all three.

Chrono-nutrition is a field of nutrition science that studies how meal timing relates to circadian rhythms. Soluna Doc builds on it with two formulas: the Sun Stick for the morning and the Moon Stick for the evening.

Soluna Doc postbiotic drink mix is available from our JD.com and Tmall flagship stores. For details, please call our service hotline at +86 400-802-8001.

Soluna Doc is a science-driven nutrition brand focused on postbiotic drink mixes for children, owned by Beijing Ruibao Technology Co., Ltd. (北京睿葆科技有限公司).

The products are manufactured to the GB/T 29602 standard in a facility holding food production license SC13137030600445. Several strains in the formula hold Chinese invention patents, and the 4 imported strains come from globally renowned culture suppliers.

Postbiotic drink mixes are ordinary foods and can be taken daily as directed on the label. If your child has a specific health condition, consult a doctor.

This product is an ordinary food and is not a substitute for medicine. If your child is taking medication, ask a doctor or pharmacist before combining the two.