Chia
Generic name: Salvia Columbariae Benth., Salvia HispanicaI L.
Brand names: Chia, Salba
Usage of Chia
Athletic performance
Clinical data
A study evaluating chia seed as a source of energy found enhanced endurance, but not performance, among athletes(Illian 2011); however, another small study in male and female long distance runners (N=24) reported no effect on run time to exhaustion, respiratory exchange ratio, or cortisol or inflammatory outcome measures with chia seed oil consumption. Elevations in plasma alpha-linolenic acid were noted.(Nieman 2015)
Cancer
Animal data
Chia oil inhibited growth and metastasis of adenocarcinoma in mice, possibly due to the omega-3 polyunsaturated fatty acid content.(Espada 2007) Further studies suggest chia mucilaginous polysaccharide extract may enhance the effects of medicines used in chemotherapy, such as vinblastine, via activity on efflux pump transport systems.(Rosas-Ramirez 2017) Findings regarding effects of chia on proinflammatory cytokines and anti-inflammatory processes related to tumor development are equivocal.(Carnier 2018, Ferreira 2018) Antioxidant activity has been described.(Marcinek 2017, Marineli Rda 2015)
Cardiovascular effects
Clinical data
Small clinical studies evaluating effects of chia on cardiovascular disease risk factors have been conducted and tend to report positive findings.(Nieman 2009, Parker 2018, Toscano 2014, Vuksan 2007)
A systematic review of studies published through 2014 and evaluating effects of S. hispanica consumption on cardiovascular risk factors, and another meta-analysis of 12 clinical trials published through December 2016 and evaluating use of chia seed for a wide variety of conditions reported no effect of chia seed supplementation on cardiovascular- or diabetes-related outcome measures.(de Souza Ferreira 2015, Teoh 2018) Subgroup analysis suggested higher doses of chia seed may have a positive impact on postprandial blood glucose, high-density lipoprotein, and diastolic blood pressure.(Teoh 2018)
Cognitive effects
Animal data
In senescence-accelerated mice under aging and metabolic stress via a high-fat diet, cognitive function was not enhanced with chia seed supplementation.(Rui 2018) In a series of neurobehavioral tests, administration of S. hispanica water extract in mice resulted in significantly improved responses compared to the control. Results suggested that the responses were likely due to improvements related to memory, learning, anxiety, and stress that may also reflect antidepressant effects.(Adel 2019)
Dermatological effects
Clinical data
Topical chia seed oil (4%) administered for 8 weeks acted as an emollient in a small study of patients with pruritus (N=10).(Jeong 2010)
Diabetes
Animal data
Studies in rodents generally report positive findings, including decreased insulin resistance and improved glucose metabolism.(Creus 2017, Fortino 2017, Marineli Rda 2015, Oliva 2013)
Clinical data
Small studies conducted by a limited group of researchers have produced equivocal findings.(Marcinek 2017) A meta-analysis of 12 clinical trials published through December 2016 and evaluating use of chia seed for a wide variety of conditions reported no effect of chia seed supplementation on cardiovascular- or diabetes-related outcome measures. Subgroup analysis suggested higher doses of chia seed may have a positive impact on postprandial blood glucose, high-density lipoprotein, and diastolic blood pressure.(Teoh 2018)
In a small study in healthy female volunteers (N=24), chia seed added to yogurt reduced short-term food intake (thus reduced postprandial glycemia) and increased satiety, effects attributable to the high fiber content of chia seed.(Ayaz 2017) In another small clinical study among healthy participants (N=15), chia seed demonstrated the ability to convert glucose into a slow-release carbohydrate and affect satiety to a greater extent than flax.(Vuksan 2017)
The American Diabetes Association updated guidelines on the standards of medical care in diabetes (2021) recommends individualized medical nutrition therapy program as needed to achieve treatment goals for all people with type 1 or 2 diabetes, prediabetes, and gestational diabetes (level A), with dietary fats supplied by eating foods rich in long-chain omega-3 fatty acids, including seeds containing alpha-linolenic acid, to prevent or treat cardiovascular disease (level B).(ADA 2021)
Dyslipidemia/Obesity
Animal data
Studies conducted in rodents and rabbits suggest positive effects on lipid profile, with equivocal findings reported for obesity.(Ferreira 2018, Fortino 2017, Marcinek 2017, Oliva 2013)
Clinical data
In a small clinical study in postmenopausal women (N=10), consumption of chia seed 25 g/day for 7 weeks resulted in an increase in plasma alpha-linolenic acid and eicosapentaenoic acid.(Jin 2012) In a study of 90 overweight participants who supplemented their diet with chia seed 50 g daily for 12 weeks, no change in lipid profile, body mass, or composition occurred.(Nieman 2009) Similarly, a study in overweight women by the same researchers showed improvements in alpha-linolenic acid and eicosapentaenoic acid levels but no changes in body composition, markers of inflammation, blood pressure, or lipoprotein levels with chia seed supplementation (25 g/day for 10 weeks).(Parker 2018)
A meta-analysis of 12 clinical trials published through December 2016 and evaluating use of chia seed for a wide variety of conditions reported no effect of chia seed supplementation on cardiovascular- or diabetes-related outcome measures. Subgroup analysis suggested higher doses of chia seed may have a positive impact on postprandial blood glucose, high-density lipoprotein, and diastolic blood pressure.(Teoh 2018)
Long-term intake
Animal data
A study evaluating long-term dietary intake of chia seed in rodents demonstrated several potential benefits, including differences in bone mineral content and densitometry analysis compared to controls.(Montes Chani 2018)
Vegetarian diet
Clinical data
The Academy of Nutrition and Dietetics' updated position paper on vegetarian diets (2016) states that adequate nutrition can be provided by a well-planned vegetarian diet that includes seeds. Therapeutic vegetarian diets are useful in maintaining a healthy weight and body mass index and are associated with a reduction in cardiovascular disease risk and type 2 diabetes. Chia seeds and their oil are one of the most concentrated plant sources of omega-3 fatty acids, and seeds, in general, are a source of protein and zinc.(Melina 2016)
Chia side effects
Case reports of allergic reactions exist.Parker 2018, Tomas Perez 2018 Salmonella-infected sprouted chia seed powder led to an outbreak of foodborne infection in the United States and Canada in 2013 and 2014.Harvey 2017
According to a meta-analysis of chia use for a variety of conditions, GI adverse effects were the most commonly reported, with no differences in incidence of other adverse effects observed between participants receiving chia seed and control subjects.Teoh 2018
A case report of complete distal esophageal obstruction by a gel of hydrated chia seeds exists.Rawl 2014
Before taking Chia
Avoid use. Safety and efficacy in pregnancy and lactation have not been established. Related S. officinalis (sage) exhibits emmenagogue and abortifacient effects; however, S. miltiorrhiza has been used for pregnancy-related hypertension.Ernst 2002
How to use Chia
Clinical studies are lacking to determine dosing guidelines. Chia seed (S. hispanica) 50 g/day (in 2 divided doses) for 12 weeks was used to evaluate effects on weight and disease risk factors in a study of overweight patientsNieman 2009; a similar study in overweight postmenopausal women used 25 g/day for 10 weeks.Parker 2018 Another trial evaluating effects on cardiovascular risk factors in type 2 diabetes used S. hispanica 37 (±4) g/day for 12 weeks.Vuksan 2007 A lower amount of chia seed (about 15 g) has been proposed as the recommended daily intake by the Advisory Committee on Novel Foods and Processes.Jones 2012 The oil has also been evaluated in limited clinical settings.Nieman 2015
Warnings
Information regarding toxicity of chia is limited. In a 90-day study in chickens, a decrease in egg production among white hens receiving diets containing chia seed in amounts greater than 140 g/kg was observed.Ayerza 2002
What other drugs will affect Chia
Cases reports cite enhanced anticoagulation and bleeding in patients receiving long-term warfarin who consumed related S. miltiorrhiza (danshen). A similar effect might occur with the root of S. hispanica and S. columbariae due to the presence of tanshinones. Therefore, caution is warranted if chia is used concurrently with anticoagulants (eg, warfarin) or antiplatelet agents (eg, aspirin, clopidogrel, prasugrel).(Adams 2005, Cheng 2007, Ernst 2002, Hu 2005)
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