MaryRuth's viral liquid multi uses Lustriva at the dose that thickened hair in a trial, but 10,000 mcg of biotin can skew lab tests and it costs $2.50 a day.
Mixed
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Last reviewed October 5, 2026 by the Nutrition Reviews Editorial Team · How we review
Our verdict
This is one of the few viral hair supplements that uses its headline ingredient at the dose that worked in a trial, and Clean Label Project certification adds confidence. The trade-offs are real: the evidence is one ingredient study, the 10,000 mcg of biotin can skew blood tests, and $2.50 a day is steep for a multivitamin missing key minerals. Women who want one tasty liquid for hair and daily vitamins may find a three-month trial worthwhile, but anyone with upcoming lab work or a tight budget should look elsewhere.
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Key ingredients at clinically studied doses, and how strong the evidence is.
Third-party testing and certifications, manufacturing standards, contaminant testing, recall history.
Cost per effective serving compared with category peers.
Taste, mixability, texture and tolerability from aggregated buyer and creator feedback.
Full label disclosure (no proprietary blends), available COAs, honest marketing.
MaryRuth's Liquid Morning Multivitamin + Hair Growth is the brand's breakout product. MaryRuth's says it sold more than 369,000 bottles in 2024, and sales data from Charm.io, reported in June 2026, put MaryRuth's among TikTok Shop's top supplement brands on the strength of its liquid hair-growth formula. It keeps the original Liquid Morning Multivitamin's base of vitamins A, C, D, E and all eight B vitamins and adds three things: 160 mg of Lustriva, 10,000 mcg of biotin and 1,000 mcg of chromium.
Lustriva is the reason to buy it. In a 12-week randomized, placebo-controlled trial in 90 women with thinning hair, about 160 mg a day of the ingredient, the dose used here, improved measures of hair thickness from week three and reduced wrinkle depth, while a lower-biotin version did no better than placebo. That is encouraging but limited: it is a single trial of the ingredient rather than this product, and it measured the ratio of fine to thick hairs rather than hair count. The extra biotin adds little for people who aren't deficient, and the FDA has warned that high biotin intake can distort lab results, including troponin tests used to diagnose heart attacks.
Two tablespoons a day replaces a basic multivitamin, though there is no iron, iodine, calcium or magnesium, and zinc is only 1 mg. It is sugar-free (vegetable glycerin supplies 8 g of carbohydrate), vegan, made in a GMP facility and certified by the Clean Label Project, which screens for contaminants. Most buyers like the Peach Mango flavor; a minority report stomach upset. At about $2.50 a day at the brand's price, it costs more than most hair supplements we cover.
| Key ingredient | Per serving | Why it matters |
|---|---|---|
| Lustriva (inositol-stabilized arginine silicate, magnesium biotinate) Matches the high-dose arm (146.5 mg arginine silicate plus 11.7 mg magnesium biotinate) that beat placebo for hair thickness in a 12-week trial; the low dose did not. | 160 mg | Matches the high-dose arm (146.5 mg arginine silicate plus 11.7 mg magnesium biotinate) that beat placebo for hair thickness in a 12-week trial; the low dose did not. |
| Biotin (as magnesium biotinate) 33,333% of the Daily Value; it helps hair mainly when you are deficient, and doses this high can interfere with some lab tests. | 10,000 mcg | 33,333% of the Daily Value; it helps hair mainly when you are deficient, and doses this high can interfere with some lab tests. |
| Chromium (as chromium picolinate) 2,857% of the Daily Value, included for metabolism and blood sugar support; no upper limit has been established. | 1,000 mcg | 2,857% of the Daily Value, included for metabolism and blood sugar support; no upper limit has been established. |
| B vitamins (methylfolate, methylcobalamin and six others) All eight B vitamins at 128% to 500% of the Daily Value, using active folate (510 mcg DFE) and B12 (12 mcg). | — | All eight B vitamins at 128% to 500% of the Daily Value, using active folate (510 mcg DFE) and B12 (12 mcg). |
| Vitamin D3 100% of the Daily Value as cholecalciferol. | 20 mcg (800 IU) | 100% of the Daily Value as cholecalciferol. |
Supplement Facts
Serving Size 2 Tbsp (30 mL)
Servings Per Container About 30
* Percent Daily Values are based on a 2,000 calorie diet. † Daily Value not established.
Other ingredients: Purified Water, Vegetable Glycerin, Natural Flavors, Xanthan Gum, Evaporated Sea Water, Cranberry Fruit Powder, Organic Aloe Vera Inner Leaf Extract, Citric Acid, and Organic Noni Fruit Powder.
Flavors & variants
Testing & quality
Several products, including the Liquid Morning Multivitamin, are Clean Label Project Certified; no USP or NSF certification is listed for its multivitamins.
Goals it supports
Independent creators reviewing Liquid Morning Multivitamin + Hair Growth on TikTok.
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