Do Boswellia, turmeric and yucca help a dog's joints?

Possibly, but the dog evidence for all three is limited. Boswellia has one uncontrolled dog study, turmeric trials have given conflicting results, and we found no controlled dog joint trial of yucca on its own. A 2022 meta-analysis found clear evidence only for omega-3 sources.¹

What are Boswellia, turmeric and yucca?

• Boswellia serrata is a tree. Supplements use an extract of its resin.²
• Turmeric is the spice plant Curcuma longa.⁷ Curcumin is the compound in it that most research focuses on.⁵
• Yucca schidigera is a plant whose extract contains saponins and is added to some dog and cat diets.⁶

What did the dog study on Boswellia measure?

The study most often cited is Reichling and colleagues, 2004, an open, multi-center trial: 29 dogs with chronic joint or spinal disease were enrolled, 24 were included in the analysis, and all of them received a Boswellia resin extract with their food for six weeks.²

The authors reported an overall effect in 71% of the 24 dogs after two weeks, and a statistically significant reduction in signs such as intermittent lameness, local pain and stiff gait after six weeks. Five dogs had brief diarrhea or flatulence; a link to the extract was suspected in one.²

The limit is the design. There was no placebo group, and everyone knew what the dogs were getting, so the result cannot separate the extract from expectation. Boswellia also appears in tested multi-ingredient products, where its own contribution cannot be isolated.¹

What did the dog studies on turmeric find, and why is black pepper added?

Turmeric has controlled trials, and they disagree.

• Innes and colleagues, 2003. A randomized, double-blind, placebo-controlled trial of a turmeric extract (P54FP) in dogs with osteoarthritis, over eight weeks. Force plate measurements showed no statistical difference between groups, and neither did owner assessments. The investigators' assessment favored the extract.³
• Comblain and colleagues, 2017. A three-month randomized, double-blind, placebo-controlled trial completed by 42 dogs with osteoarthritis. The test diet combined curcuminoid extract, hydrolyzed collagen and green tea extract. Force plate analysis again showed no difference. Pain on manipulation and ability to rise from lying down improved in the supplemented group.⁴

In both, the objective gait measure did not move and some subjective ones did. The second tested three ingredients together. The 2022 meta-analysis described turmeric results as conflicting.¹

One likely reason is absorption. A review of curcumin research describes its bioavailability as poor, mainly because of poor absorption, rapid metabolism and rapid elimination.⁵ That is why turmeric is often paired with black pepper. Its main active compound, piperine, increased curcumin bioavailability by 2,000% in a 1998 study by Shoba and colleagues.⁵ That figure comes from human volunteers; the same paper also tested rats. We have not found a study showing the effect in dogs.

Is there evidence for yucca in dog joints?

Very little. The pet research on Yucca schidigera that we could find looks at digestion, not joints. A 1997 study added yucca extract to dog and cat diets and measured stool odor, stool pH, food transit time and blood values.⁶ The 2022 meta-analysis of 72 trials does not describe a yucca trial.¹ Its place in joint formulas rests on traditional use, not on trials in dogs with joint problems.

How do these botanicals compare with omega-3 sources, and are they safe?

The 2022 meta-analysis by Barbeau-Grégoire and colleagues pooled 72 trials in nine categories. It reported "evident clinical analgesic efficacy" for omega-3-enriched diets and omega-3 supplements, a group that included green lipped mussel, and it did not find enough evidence to recommend the botanical and mixed-ingredient categories.¹

The Merck Veterinary Manual lists Boswellia as typically well tolerated with occasional stomach upset, and notes it may inhibit platelet aggregation and so increase bleeding risk. For turmeric it lists diarrhea, flatulence or bloating at high doses, and a possible increase in bleeding risk when combined with NSAIDs.⁷

Why they are in Tailwise

Tailwise Hip & Joint is built around New Zealand green lipped mussel (200 mg per chew) and includes Boswellia serrata 25 mg, turmeric 25 mg, Yucca schidigera 25 mg and black pepper 5 mg per chew. Each amount is listed individually, with no proprietary blend. The studies described above used other products and other amounts, so their results are not results for ours. The chew supports joint comfort and mobility. It contains shellfish.