Two Products, One Confusing Name
The single most common sourcing error we see on hawthorn enquiries is a request for “hawthorn extract” with no marker specified. That’s a problem, because hawthorn flavonoids and maslinic acid are two chemically unrelated compounds sold under the same plant name — one is a flavonoid glycoside studied mainly for cardiovascular and antioxidant research, the other is a pentacyclic triterpenoid acid studied for inflammatory-pathway and muscle-related research. Same plant, same COA request line, completely different molecule. Here’s how to tell them apart and specify the right one.
Part of the confusion is that most of the published maslinic acid literature is written around olive, not hawthorn — the compound is abundant in the cuticular lipid layer of olive skin and is most commonly studied and commercially sourced from olive fruit and olive-pomace processing byproducts.[3] Hawthorn is a legitimate but comparatively minor source. A supplier quoting “maslinic acid” without naming the botanical source could reasonably be describing either — which is exactly the ambiguity a precise enquiry needs to close.
Hawthorn Flavonoids: The Cardiovascular Research Ingredient
Hawthorn’s flavonoid fraction — vitexin, hyperoside, and related compounds — is what the published cardiovascular literature is standardized on, including the SPICE trial and the Cochrane review of standardized extract in heart failure patients.[1] A 2020 review characterized four specific mechanistic directions studied for this fraction: serum-lipid effects, antioxidant activity including inhibition of LDL oxidation, inflammatory-pathway modulation, and vascular-endothelial function.[1] More recently, a 2025 meta-analysis pooling six placebo-controlled trials (428 participants) reported a mean systolic blood pressure reduction of −6.65 mmHg over treatment periods of 10 weeks to 6 months — though the authors note the evidence base remains limited in trial size and number.[5] Valeherb supplies this fraction as total flavonoids at 20%, 50%, and 80%, quantified by HPLC/UV — full detail on grades and species is on the hawthorn extract product page.
What Is Maslinic Acid (Crataegolic Acid)?
Maslinic acid is a pentacyclic triterpenoid (C₃₀H₄₈O₄) — structurally unrelated to flavonoids entirely. In hawthorn, it’s a minor constituent rather than the plant’s headline compound; the same molecule is also found in olive skin and loquat, which is why it’s sometimes called “crataegolic acid” in one context and simply “maslinic acid” in another. Published research on maslinic acid centers on inflammatory-pathway modulation: cell-model research has documented inhibition of NF-κB signaling, the same pathway implicated in chronic low-grade inflammation and arthritic conditions.[3] A separate and more recent research area — covered below — looks at maslinic acid’s effect on skeletal muscle in aging populations.
Side by Side: Two Compound Classes
| Parameter | Hawthorn Flavonoids | Maslinic Acid |
|---|---|---|
| Compound class | Flavonoid glycosides (vitexin, hyperoside) | Pentacyclic triterpenoid |
| Molecular formula | Varies by marker compound | C₃₀H₄₈O₄ |
| Also found in | Hawthorn is the primary commercial source | Olive skin, loquat, hawthorn |
| Primary research area | Cardiovascular, antioxidant, blood pressure | Inflammatory pathway (NF-κB), skeletal muscle |
| Key clinical evidence | SPICE trial, Cochrane review, 2025 BP meta-analysis | Human RCT: resistance training in elderly adults |
| Valeherb grades | 20% / 50% / 80% total flavonoids | 10% / 20% / 40% / 98% |
Flavonoids and maslinic acid occur in the same hawthorn plant material but are extracted, standardized, and quantified as separate marker compounds — a total-flavonoid COA tells you nothing about maslinic acid content, and vice versa. This is also why the two lines serve different formulation categories in practice. Flavonoid-standardized extract at 50% or 80% is the default for cardiovascular-support and antioxidant supplement capsules and tablets, and pairs naturally with pomegranate or hibiscus in functional beverage and RTD formats where a tart berry-adjacent flavor profile is expected. Maslinic acid, particularly the 40% and 98% grades, fits a different set of categories entirely: sports-nutrition and metabolic-support supplements where precise triterpenoid dosing matters more than flavonoid content, and cosmetic/topical formulations where the compound is used as an enriched fraction or high-purity active. Neither grade substitutes for the other in these applications — the formulation problem each one solves is different.
One More Wrinkle: Maslinic Acid Isn’t Only From Hawthorn
Because maslinic acid also occurs naturally in olive skin and loquat, a “maslinic acid” COA needs to state which plant it was extracted from — the compound is identical regardless of source, but botanical origin affects Non-GMO documentation, allergen statements, and country-of-origin labeling. Commercially, olive-derived maslinic acid (often marketed under trade names tied to olive pomace processing) and hawthorn-derived material are both legitimate sources, but they are not interchangeable for every purpose: a supplement or cosmetic positioned around “hawthorn-sourced actives” needs the botanical origin to match the label story, not just the assay result. If your formulation or label references hawthorn specifically, confirm the maslinic acid on your COA is hawthorn-sourced, not backfilled from an olive-derived batch during a supply shortage — and request HPLC-quantified content for the specific marker your formulation needs, not a generic “total triterpenoids” figure. If your flavonoid application specifically needs to reference the European clinical research literature, plant part matters too — see Hawthorn Berry vs Leaf & Flower Extract for why that research was conducted on one specific plant part.
Sports Nutrition and Healthy Aging: The Human Data on Maslinic Acid
This is where maslinic acid’s research base is thinner than hawthorn flavonoids’ in trial count, but the human evidence that does exist is worth detailing rather than summarizing in one line. A double-blind, randomized, placebo-controlled trial in 36 community-dwelling older adults tested 60 mg/day of olive-derived maslinic acid combined with moderate resistance training against training alone, over 12 weeks.[4] At the end of the trial, the maslinic acid group showed significant improvements in skeletal muscle mass, segmental muscle mass, and grip strength on the stronger side, along with reduced knee pain in the right knee — the placebo-plus-training group showed no comparable change across these measures over the same 12 weeks.[4] This is a small trial by pharmaceutical standards, but it is a human randomized controlled trial, not a cell or animal model — a meaningfully higher tier of evidence than most botanical ingredient research reaches, and it directly supports the sports-nutrition and healthy-aging positioning increasingly seen for maslinic acid isolates.
Frequently Asked Questions
Is maslinic acid the same thing as hawthorn extract?
No. Hawthorn extract most often refers to the flavonoid fraction (vitexin, hyperoside) studied in cardiovascular research. Maslinic acid is a separate, chemically unrelated triterpenoid found in hawthorn in smaller amounts, alongside olive and loquat. Always specify which one you need on a COA request.
Can maslinic acid come from a plant other than hawthorn?
Yes. Maslinic acid occurs naturally in olive skin and loquat as well as hawthorn. The molecule is chemically identical regardless of source, but botanical origin affects labeling, Non-GMO documentation, and allergen statements — always confirm the source plant on your certificate of analysis.
Which one should I use for a cardiovascular supplement?
Flavonoid-standardized hawthorn extract is the ingredient with the cardiovascular and antioxidant research base, including the SPICE trial and Cochrane review. Maslinic acid’s published research centers on inflammatory pathways and muscle-related outcomes, not cardiovascular endpoints, so it isn’t a substitute for the flavonoid fraction in that category.
Does maslinic acid have research support for muscle health?
Yes — a randomized, placebo-controlled human trial found that older adults taking 60 mg/day of olive-derived maslinic acid alongside resistance training gained more muscle mass and grip strength over 12 weeks than those doing resistance training alone. It’s a small trial, but it’s human RCT-level evidence, not just a cell or animal model.
References
[1] Wu M, Liu L, Xing Y, Yang S, Li H, Cao Y. Roles and Mechanisms of Hawthorn and Its Extracts on Atherosclerosis: A Review. Frontiers in Pharmacology, 11, 118 (2020). https://doi.org/10.3389/fphar.2020.00118
[2] Holubarsch CJF, Colucci WS, Meinertz T, Gaus W, Tendera M. The efficacy and safety of Crataegus extract WS 1442 in patients with heart failure: the SPICE trial. European Journal of Heart Failure, 10(12), 1255–1263 (2008). https://doi.org/10.1016/j.ejheart.2008.10.004
[3] Fukumitsu S, Villareal MO, Onaga S, et al. Anti-inflammatory and anti-arthritic effects of pentacyclic triterpenoid maslinic acid through NF-κB inactivation. Molecular Nutrition & Food Research, 60(2), 399–409 (2016). https://doi.org/10.1002/mnfr.201500465
[4] Nagai N, Yagyu S, Hata A, Nirengi S, Kotani K, Moritani T, Sakane N. Maslinic acid derived from olive fruit in combination with resistance training improves muscle mass and mobility functions in the elderly. Journal of Clinical Biochemistry and Nutrition, 64(3), 224–230 (2019). https://doi.org/10.3164/jcbn.18-104
[5] Szikora Z, Mátyus RO, Vargáné Szabó B, Csupor D, Tóth B. Hawthorn (Crataegus spp.) Clinically Significantly Reduces Blood Pressure in Hypertension: A Meta-Analysis of Randomized Placebo-Controlled Clinical Trials. Pharmaceuticals, 18(7), 1027 (2025). https://doi.org/10.3390/ph18071027
