Butterfly pea flower has been making beverages turn blue and purple in Southeast Asia for thousands of years. What started as a regional culinary tradition — blue rice, violet desserts, naturally colored teas in Thailand, Malaysia, and Vietnam — became a global wellness and hospitality trend in the 2020s, driven partly by Starbucks' Tropical Butterfly Refresher (which uses it as the natural blue colorant) and partly by the explosion of color-changing coffee and cocktail content on TikTok.
As it enters more mainstream products — functional coffee, lattes, supplements, skincare, spirits — consumers are understandably asking the safety questions that should accompany any widely adopted botanical ingredient. This guide answers them completely.
What Is Butterfly Pea Flower?
Butterfly pea flower is the dried flower of Clitoria ternatea, a climbing plant native to tropical Asia and now grown across tropical and subtropical regions globally. It is a legume — botanically related to peas, chickpeas, and lentils — with striking deep-blue flowers that can be dried and steeped to produce intensely blue-colored tea.
The blue color comes from a family of flavonoid compounds called anthocyanins, specifically a subgroup called ternatins (twelve distinct ternatins have been identified in butterfly pea flower). These ternatins are responsible for both the color and the remarkable pH sensitivity that makes butterfly pea flower tea change color when acids or bases are added — the chemical basis of MoodWell's live color shift.
Beyond color, butterfly pea flower has been used in Ayurvedic medicine and traditional Southeast Asian medicine for cognitive support, hair growth promotion, and anti-inflammatory applications. For the full compound and benefits breakdown, see our post on butterfly pea flower benefits.
The Safety Research: What Studies Actually Show
The safety profile of butterfly pea flower has been studied through multiple research approaches:
Acute Toxicity Studies
Multiple animal toxicology studies have evaluated acute toxicity (LD50 — the dose that kills 50% of test animals). Butterfly pea flower extracts consistently show no observable adverse effects at doses far above what any human would realistically consume. A study published in the Journal of Ethnopharmacology found no mortality or significant adverse effects at oral doses of 2,000mg/kg body weight in rodents — a dose approximately 140 times higher than typical human consumption per kg.
Genotoxicity (DNA Damage) Studies
Genotoxicity testing evaluates whether a substance can damage DNA — one of the most important safety indicators for any food ingredient. Butterfly pea flower and its isolated ternatins have consistently shown no genotoxic effects in multiple testing frameworks, including the Ames test (bacterial mutation assay) and mammalian cell culture studies. This is a reassuring finding because genotoxic compounds are the most concerning from a chronic safety standpoint.
Subchronic and Chronic Studies
Animal studies evaluating the effects of repeated butterfly pea flower consumption over weeks to months have found no significant organ toxicity, no hormonal disruption, and no accumulation-related adverse effects at doses relevant to regular supplementation. These studies informed regulatory decisions in Thailand, Malaysia, and increasingly in Western markets that butterfly pea flower is safe for use as a food ingredient.
FDA Status in the United States
In 2021, the FDA approved butterfly pea flower as a color additive for use in food and beverages in the United States under 21 CFR Part 73. This represents a formal regulatory safety determination for use in food products — the butterfly pea flower in MoodWell's Bloom Sachets is being used within a food-grade approved application. This is the most relevant regulatory benchmark for US consumers.
Traditional Use as Safety Context
Beyond laboratory research, the traditional use record provides important real-world safety context. Butterfly pea flower has been a staple ingredient in Thai and Malaysian cuisine for centuries. The traditional blue rice dish (nasi kerabu) is a standard preparation in Malaysian cooking; blue-tinted desserts and teas are everyday foods in Thailand. Hundreds of millions of people in Southeast Asia have consumed butterfly pea flower regularly as a food ingredient without documented population-level harm. This level of traditional use in a geographically confined population would have surfaced serious adverse effects if they existed at normal consumption levels.
Reported Side Effects: The Complete Picture
The most commonly reported adverse effects in the research literature and consumer use are:
- Mild nausea: Reported in some users, typically at higher doses or on an empty stomach. This is common with many plant-based supplements and is not considered a specific butterfly pea flower toxicity effect.
- Loose stools / GI upset: Rare; typically associated with very high doses.
- Allergic reactions: Very rare. As butterfly pea flower is a legume, people with severe legume allergies (particularly peanut, soy, or tree nut) should approach it with the same caution they apply to all legumes.
At the doses used in MoodWell's Bloom Sachets, none of these adverse effects are expected for healthy adults without relevant contraindications.
Who Should Use Caution or Avoid Butterfly Pea Flower
Pregnant Women
This is the most important contraindication. Traditional use of butterfly pea flower in several Southeast Asian cultures includes applications for stimulating uterine contractions as part of traditional childbirth practices. Whether this traditional use reflects actual uterotonic (uterus-contracting) activity is not fully established in modern pharmacology, but the traditional association is a reason for precaution. Pregnant women should avoid butterfly pea flower supplements as a precaution. The risk is theoretical rather than documented in modern medicine, but the principle of caution during pregnancy applies.
Breastfeeding / Nursing Mothers
There is insufficient safety data on butterfly pea flower during breastfeeding. As a precaution, nursing mothers should consult a healthcare provider before use and consider avoiding it during the nursing period.
People Taking Blood Thinners
Preclinical research has indicated potential mild anticoagulant (blood-thinning) activity in butterfly pea flower compounds. This is relevant for people taking warfarin, heparin, apixaban (Eliquis), rivaroxaban (Xarelto), or other anticoagulant medications. The interaction has not been documented in clinical trials, but theoretical additive anticoagulant effects warrant precaution. Consult your prescribing physician before adding butterfly pea flower supplements to your routine.
People With Diabetes Medications
Butterfly pea flower has demonstrated blood glucose-lowering effects in animal models, potentially through alpha-glucosidase inhibition. For most people, this is a beneficial property. For people taking diabetes medications (metformin, sulfonylureas, insulin), additive glucose-lowering effects could theoretically cause hypoglycemia. Monitor glucose levels if combining and consult your physician.
People With Severe Legume Allergies
As a member of the Fabaceae (legume) family, butterfly pea flower carries theoretical cross-reactivity risk with other legumes for people with severe legume allergies. People with anaphylactic responses to peanuts, soybeans, or other legumes should consult an allergist before use.
Children
No specific safety data exists for butterfly pea flower in children. MoodWell products are adult supplements and are not intended for consumption by children.
Butterfly Pea Flower in MoodWell: Dose Context
It is worth being specific about the MoodWell context: the butterfly pea flower in each MoodWell cup is present in the Bloom Sachet at a dose calibrated to produce the color shift — not at the higher doses used in some therapeutic supplement applications. The visual drama of the color shift does not require large doses of butterfly pea flower; the ternatins are highly efficient at producing color change at relatively modest concentrations. The dose in each Bloom Sachet is below the threshold at which any adverse effects have been documented in healthy adults in the literature.
For comparison of the color-changing mechanism and dose relationships, see our post on what is butterfly pea flower coffee.
Interaction With Medications: The Complete List
| Medication Type | Theoretical Interaction | Recommendation |
|---|---|---|
| Blood thinners (warfarin, etc.) | Additive anticoagulant effect | Consult physician; monitor INR if used |
| Diabetes medications | Additive blood glucose lowering | Monitor glucose; consult physician |
| Sedatives / sleep medications | Possible mild additive CNS effects (theoretical only) | Low concern; mention to physician |
| All other medications | No known interactions | No specific precaution required |
Frequently Asked Questions
Is butterfly pea flower the same as what Starbucks uses in their drinks?
Yes. The Starbucks Tropical Butterfly Refresher uses butterfly pea flower as a natural blue color agent. The ingredient is the same; the form, dose, and context differ. For more on this, see our Starbucks Tropical Butterfly Refresher copycat recipe which explains the butterfly pea flower color mechanism in a beverage context.
Can I drink butterfly pea flower every day?
For healthy adults without the contraindications listed above, daily consumption at the doses in MoodWell Bloom Sachets is well within the safety profile established by both traditional use and modern safety research. The question is not really safety for daily use — it is whether you want to drink MoodWell every day. The answer, for most people who try it, is yes.
Does butterfly pea flower taste like anything?
Butterfly pea flower anthocyanins are essentially tasteless. The color shift from the Bloom Sachet does not add any identifiable flavor. Each SKU's Bloom Sachet has taste contributors from its other components (citric acid in HUSTLE, spirulina in RESTORE, oat milk in CALM), not from the butterfly pea flower itself. For the full flavor profile, see what does mushroom coffee taste like.
Does cooking or heating destroy butterfly pea flower's properties?
The color-producing anthocyanins in butterfly pea flower are heat-stable up to approximately 175°F (80°C). Above this temperature, some degradation occurs. MoodWell recommends water at 170°F (76°C) for optimal color activation. Boiling water (212°F/100°C) will still produce color but slightly less vibrancy. The antioxidant properties of the ternatins are also partially heat-stable, though some degradation at high temperatures is expected.
The Bottom Line
For healthy adults, butterfly pea flower has a well-established safety profile supported by centuries of traditional food use, modern toxicology research, and FDA regulatory approval as a color additive. The primary contraindications — pregnancy, blood thinners, diabetes medications — are important and should be taken seriously. For everyone else, the safety picture is reassuring.
The color-changing chemistry in every MoodWell cup is natural, well-documented, and centuries old. It just happens to also be extraordinarily beautiful.
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