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Product guide

L-Theanine 200 mg Suntheanine Capsules

L-Theanine 200 mg Suntheanine Capsules is a L-Theanine product from Source Naturals. Start with ingredients, dose, safety cautions, price context, and whether it fits Stress, Sleep, Brain Health.

Mixed evidence Medium safety attention Experience: Early
Educational onlyChecked 2026-08-05Structured Source ReviewLabels can changeLabel details

Decision summary

L-Theanine 200 mg Suntheanine Capsules

Suntheanine capsule comparison

Best forSuntheanine capsule comparison
Watch outDSLD label warns against use in pregnancy/breastfeeding and with some antidepressants unless supervised.
Dose / serving1 capsule
PriceCheck retailerper serving estimate; can change
SafetyMedium attention
Checked2026-08-05Structured Source Review

Key Comparison Metrics

FormCapsuleproduct format
Serving1 capsulelabel serving
CostCheck retailerper serving estimate; can change
EvidenceMixedingredient-level signal
SafetyMediumattention level
Experience signalEarlyearly fit signal

Safety Snapshot

Medication

Screen sedatives, antidepressants, blood pressure medicines, and other relevant medications before use.

Conditions

Pregnancy, breastfeeding, chronic conditions, and unusual symptoms need professional guidance.

Allergy

Check capsule, softgel, coconut, gelatin, soy, flavor, and excipient details on the current label.

Pregnancy

Ask a healthcare professional before use during pregnancy or breastfeeding.

Side effects

Drowsiness, digestive discomfort, or unexpected relaxation effects can occur depending on user context.

Dose caution

Check label serving and total intake

Preference Snapshot

Optional values-based signals. Unknown means Supppedia has not verified the label or source yet.

Organic / Non-GMO

Unknown / Claimed

Vegan

Unknown

Animal-derived

Unknown

Clean label

Unknown

Testing

Unknown

Packaging

Unknown

Before You Buy

Use this final check before choosing this product.

Label

Confirm serving size, active amount, added ingredients, and warning label.

Safety

DSLD label warns against use in pregnancy/breastfeeding and with some antidepressants unless supervised.

Trust

Checked 2026-08-05; confidence: Structured Source Review.

Experience

Look for tolerability and repeat-use signals when available.

20-second check-in

Used this before?

Optional: share three quick signals after this page has helped you decide.

Benefits

This product is connected to Stress, Sleep, Brain Health. Benefits are shown as possible use cases. Results and fit can vary.

Ingredients

Start with the product label, then connect the ingredient to evidence and safety context.

Side Effects and Safety Notes

  • Compare dose, caffeine/sedative stacking, timing, and medication context before choosing.
  • Medication: Screen sedatives, antidepressants, blood pressure medicines, and other relevant medications before use.
  • Condition: Pregnancy, breastfeeding, chronic conditions, and unusual symptoms need professional guidance.
  • Allergy: Check capsule, softgel, coconut, gelatin, soy, flavor, and excipient details on the current label.
  • Possible side effect: Drowsiness, digestive discomfort, or unexpected relaxation effects can occur depending on user context.
  • Pregnancy/Breastfeeding: Ask a healthcare professional before use during pregnancy or breastfeeding.
  • Ingredient context: Screen pregnancy, breastfeeding, sedatives, blood pressure medication, and daytime sleepiness context.

Dosage

Label serving size: 1 capsule. Compare this with ingredient-level dosage ranges and reported dosage patterns.

Research Summary

Evidence strength is currently marked as mixed. Use ingredient-level evidence first and avoid assuming product-specific clinical proof unless available.

Label Check

Last checked
2026-08-05
Next check
2026-09-04
Label confidence
Structured Source Review

Shown fields

Brand, Product Name, Category, Dosage Form, Serving Size, Ingredient Links, Dose Or Active Amount, Source Url

Can change

Price Per Serving, Availability, Servings Per Container, Label Warnings, Testing Claims

Product labels, warnings, availability, and prices can change. Recheck the current product label before buying.

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