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Compare supplement prices normalized to cost per gram of active ingredient. No health claims — just transparent pricing data.

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Search Supplements

24 products found

Form:All forms24Powder2Capsule19Tablet1Softgel1Liquid1
Package Size:All sizes1760–12012120–2504250+1

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Supplement Type

Alpha GPCAshwagandhaB ComplexCalciumCollagenCoQ10CreatineImmune SupportInositolL-TheanineLion's ManeMagnesiumNadNmnNootropicsNrOmega-3ProbioticsProteinPterostilbeneResveratrolSpermidineSuperfoodsVitamin CVitamin DZinc

Retailer

AmazonBulkSupplementsiHerbSwanson Vitamins

Brand

21st CenturyABEALLMAXAdvanced ClinicalsAgeless Foundation Laboratories

Form

capsulecapsulesgummyliquidlozengepowdersoftgeltablet

Availability

In Stock Only
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Save 99%
Best Deal
#1
Bulk Supplements, L-Theanine Powder, 1 Kilogram (2.2 lbs)
$0.05per gram
$50.97 / bag
Bulk Supplements, L-Theanine Powder, 1 Kilogram (2.2 lbs)
BulkSupplementsBulkSupplements4 options
Per Serving$0.01
Servings5000
Formpowder
Updated today
BBuyAffiliate link

All options (sorted by value):

B
BulkSupplements5000 ctBulk Supplements, L-Theanine Powder, 1 Kilogram (2.2 lbs)
$50.97Buy
B
2500 ctBulk Supplements, L-Theanine Powder, 500 Grams (11.1 bs)
$34.97Buy
B
1250 ctL-Theanine Powder
$23.97Buy
+1 more...
Save 98%
#2
L-Theanine Capsules
$0.29per gram
$20.97 / bottle
L-Theanine Capsules
BulkSupplementsBulkSupplements
Per Serving$0.06
Servings365
Formcapsule
Updated today
BBuyAffiliate link
Save 98%
#3
Vitamatic, L-Theanine, 240 Tablets, (200 mg per Tablet)
$0.31per gram
$14.99 / bottle
Vitamatic, L-Theanine, 240 Tablets, (200 mg per Tablet)
VitamaticiHerbNew
Per Serving$0.12
Servings120
Formtablet
Updated today
iBuyAffiliate link
Save 97%
#4
fitcode L Theanine 200mg Capsules for Focus and Relaxation L-theanine 200mg Nootropic Supplement for Attention Energy and Focus - Daytime Mood Support and Nootropic Focus Supplement
$0.40per gram
$4.75 / bottle
fitcode L Theanine 200mg Capsules for Focus and Relaxation L-theanine 200mg Nootropic Supplement for Attention Energy and Focus - Daytime Mood Support and Nootropic Focus Supplement
fitcode LAmazon
Per Serving$0.08
Servings60
Formcapsule
Updated today
BuyAffiliate link
Save 97%
#5
Nutricost, L-Theanine, 200 mg, 240 Capsules
$0.42per gram
$19.95 / bottle
Nutricost, L-Theanine, 200 mg, 240 Capsules
NutricostiHerbNew4 options
Per Serving$0.08
Servings240
Formcapsule
Updated today
iBuyAffiliate link

All options (sorted by value):

i
iHerb240 ctNutricost, L-Theanine, 200 mg, 240 Capsules
$19.95Buy
i
120 ctNutricost, L-Theanine, 200 mg, 120 capsules
$11.95Buy
i
30 ctNutricost, L-Theanine, 200 mg, 30 Capsules
$5.70Buy
+1 more...
Save 96%
#6
Primaforce, L-Theanine, 200 mg, 120 Capsules
$0.52per gram
$12.50 / bottle
Primaforce, L-Theanine, 200 mg, 120 Capsules
PrimaforceiHerbNew
Per Serving$0.10
Servings120
Formcapsule
Updated today
iBuyAffiliate link
Save 96%
#7
Organika, L-Theanine, 225 mg, 90 Vegetarian Capsules
$0.55per gram
$11.04 / bottle
Organika, L-Theanine, 225 mg, 90 Vegetarian Capsules
OrganikaiHerbNew
Per Serving$0.12
Servings90
Formcapsule
Updated today
iBuyAffiliate link
Save 96%
#8
Force Factor, L-Theanine, Extra Strength, 200 mg, 60 Vegetarian Capsules
$0.58per gram
$6.99 / bottle
Force Factor, L-Theanine, Extra Strength, 200 mg, 60 Vegetarian Capsules
Force FactoriHerbNew2 options
Per Serving$0.12
Servings60
Formcapsule
Updated today
iBuyAffiliate link

All options (sorted by value):

i
iHerb60 ctForce Factor, L-Theanine, Extra Strength, 200 mg, 60 Vegetarian Capsules
$6.99Buy
i
60 ctForce Factor, Magnesium + L-Theanine, 120 Vegetable Capsules
$19.97Buy
Save 95%
#9
NutraLife, L-Theanine, 200 mg, 60 Capsules
$0.71per gram
$8.54 / bottle
NutraLife, L-Theanine, 200 mg, 60 Capsules
NutraLifeiHerbNew
Per Serving$0.14
Servings60
Formcapsule
Updated today
iBuyAffiliate link
Save 95%
#10
NOW Foods Supplements, L-Theanine Pure Powder, Tension Management*, Amino Acid, 1-Ounce
$0.75per gram
$19.80 / bag
NOW Foods Supplements, L-Theanine Pure Powder, Tension Management*, Amino Acid, 1-Ounce
NOW FoodsAmazon2 options · 2 retailers
Per Serving$0.21
Servings93
Formpowder
Updated today
BuyAffiliate link

All options (sorted by value):

Amazon93 ctNOW Foods Supplements, L-Theanine Pure Powder, Tension Management*, Amino Acid, 1-Ounce
$19.80Buy
i
iHerb94 ctNOW Foods, L-Theanine Pure Powder, 1 oz (28 g)
$22.03Buy
Save 95%
#11
Nature's Truth L Theanine | 200mg | 60 Quick Release Capsules | Non-GMO & Gluten Free Supplement
$0.75per gram
$8.99 / bottle
Nature's Truth L Theanine | 200mg | 60 Quick Release Capsules | Non-GMO & Gluten Free Supplement
Nature's TruthAmazon2 options · 2 retailers
Per Serving$0.15
Servings60
Formcapsule
Updated today
BuyAffiliate link

All options (sorted by value):

Amazon60 ctNature's Truth L Theanine | 200mg | 60 Quick Release Capsules | Non-GMO & Gluten Free Supplement
$8.99Buy
i
iHerb60 ctNature's Truth, L-Theanine, 200 mg, 60 Quick Release Capsules
$9.08Buy
Save 95%
#12
California Gold Nutrition, L-Theanine, Featuring Alpha Waves, 100 mg, 60 count
$0.75per gram
$4.50 / bottle
California Gold Nutrition, L-Theanine, Featuring Alpha Waves, 100 mg, 60 count
California Gold NutritioniHerbNew
Per Serving$0.07
Servings60
Formcapsule
Updated today
iBuyAffiliate link
Save 90%
#13
NOW Foods Supplements, L-Theanine 100 mg with Decaf Green Tea, Stress Management*, 90 Veg Capsules
$1.41per gram
$12.70 / bottle
NOW Foods Supplements, L-Theanine 100 mg with Decaf Green Tea, Stress Management*, 90 Veg Capsules
NOW FoodsAmazon2 options
Per Serving$0.14
Servings90
Formcapsule
Updated today
BuyAffiliate link

All options (sorted by value):

Amazon90 ctNOW Foods Supplements, L-Theanine 100 mg with Decaf Green Tea, Stress Management*, 90 Veg Capsules
$12.70Buy
90 ctNOW Foods Supplements, L-Theanine 100 mg with Decaf Green Tea, Stress Management*, 90 Veg Capsules,(Pack of 2)
$23.89Buy
Save 90%
#14
Sports Research L-Theanine 200mg with Organic Coconut Oil | Suntheanine Supplement for Focus, Relaxation & Alertness | Double Strength, Non-GMO & Gluten Free
$1.48per gram
$35.47 / bottle
Sports Research L-Theanine 200mg with Organic Coconut Oil | Suntheanine Supplement for Focus, Relaxation & Alertness | Double Strength, Non-GMO & Gluten Free
Sports ResearchAmazon4 options · 2 retailers
Per Serving$0.30
Servings120
Formsoftgel
Updated today
BuyAffiliate link

All options (sorted by value):

Amazon120 ctSports Research L-Theanine 200mg with Organic Coconut Oil | Suntheanine Supplement for Focus, Relaxation & Alertness | Double Strength, Non-GMO & Gluten Free
$35.47Buy
i
iHerb120 ctSports Research, L-Theanine, 200 mg, 120 Softgels
$38.97Buy
Amazon60 ctSports Research Double Strength L-Theanine Supplement - Suntheanine Softgels for Focus, Relaxation & Alertness - Non-Drowsy Support Made with Coconut Oil, Non-GMO & Gluten Free - 200mg, 60 Count
$19.95Buy
+1 more...
Save 89%
#15
California Gold Nutrition, L-Theanine, Featuring AlphaWave®, 100 mg, 60 Veg Capsules
$1.57per gram
$9.43 / bottle
California Gold Nutrition, L-Theanine, Featuring AlphaWave®, 100 mg, 60 Veg Capsules
California Gold NutritioniHerbNew
Per Serving$0.16
Servings60
Formcapsule
Updated today
iBuyAffiliate link
Save 88%
#16
Doctor's BEST L-Theanine Contains Suntheanine, Helps Reduce Stress & Sleep, Non-GMO, Gluten Free, Vegan, 150 mg (DRB-00197), 90 Count
$1.70per gram
$22.99 / bottle
Doctor's BEST L-Theanine Contains Suntheanine, Helps Reduce Stress & Sleep, Non-GMO, Gluten Free, Vegan, 150 mg (DRB-00197), 90 Count
Doctor's BestAmazon
Per Serving$0.26
Servings90
Formcapsule
Updated today
BuyAffiliate link
Save 87%
#17
Sports Research L-Theanine Supplement with Caffeine & Coconut MCT Oil - Focused Energy, Alertness & Relaxation Without Drowsiness - 200mg L Theanine, 100mg Organic Caffeine - 60 Liquid Softgels
$1.91per gram
$22.95 / bottle
Sports Research L-Theanine Supplement with Caffeine & Coconut MCT Oil - Focused Energy, Alertness & Relaxation Without Drowsiness - 200mg L Theanine, 100mg Organic Caffeine - 60 Liquid Softgels
Sports ResearchAmazon
Per Serving$0.38
Servings60
Formliquid
Updated today
BuyAffiliate link
Save 87%
#18
Swanson, Suntheanine® L-Theanine, 200 mg, 60 Vega Capsules, 100 mg, 60 Capsules
$1.92per gram
$23.09 / bottle
Swanson, Suntheanine® L-Theanine, 200 mg, 60 Vega Capsules, 100 mg, 60 Capsules
SwansoniHerbNew
Per Serving$0.38
Servings60
Formcapsule
Updated today
iBuyAffiliate link
Save 87%
#19
Swanson, Suntheanine® L-Theanine, 200 mg, 60 Vegan Capsules
$1.92per gram
$23.09 / bottle
Swanson, Suntheanine® L-Theanine, 200 mg, 60 Vegan Capsules
SwansoniHerbNew
Per Serving$0.38
Servings60
Formcapsule
Updated today
iBuyAffiliate link
Save 82%
#20
Swanson, Suntheanine® L-Theanine, 100 mg, 200 mg
$2.60per gram
$15.59 / bottle
Swanson, Suntheanine® L-Theanine, 100 mg, 200 mg
SwansoniHerbNew2 options
Per Serving$0.26
Servings60
Formcapsule
Updated today
iBuyAffiliate link

All options (sorted by value):

i
iHerb60 ctSwanson, Suntheanine® L-Theanine, 100 mg, 200 mg
$15.59Buy
i
60 ctSwanson, Suntheanine® L-Theanine, 100 mg, 60 Veg Capsules
$15.59Buy
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