Check the current label rather than a remembered formula
The manufacturer describes a caffeine-and-theanine combination, but product formats and formulations can change. Confirm the actual bottle, serving size and number of servings. Manufacturer claims about reduced jitters are not a guarantee for an individual. [1]
Count caffeine from the whole day
FDA cites 400 mg daily as an amount not generally associated with negative effects for most adults, with substantial individual variation. It is not a target or a universal safe limit. Coffee, tea, other energy products and caffeine-containing medicines all contribute. [2]
Some circumstances need extra caution
Children and teens should avoid energy drinks according to the medical advice summarized by FDA. Pregnancy, breastfeeding, relevant conditions and medicines require individualized guidance. MSK also cautions about theanine with sedating medicines. [2][3]
Calculate the exposure before another serving
Imagine two shots of the inspected formulation are taken with a coffee containing 150 mg caffeine. That totals 350 mg, but does not establish that the combination is comfortable or appropriate. Stop and reassess if symptoms occur rather than relying on a no-jitters claim. [1][2]
| Source | Caffeine |
|---|---|
| Two 100 mg shots | 200 mg |
| Coffee | 150 mg |
| Total | 350 mg |
| Meaning | Exposure estimate, not safety clearance |
Sources for this article
- Science | Proper Wild
Source consulted: 2026-09-21. This is a reference resource, not a claim that we conducted the studies or tested a product. - Spilling the Beans: How Much Caffeine is Too Much? | FDA
Source consulted: 2026-09-21. This is a reference resource, not a claim that we conducted the studies or tested a product. - L-Theanine | Memorial Sloan Kettering Cancer Center
Source consulted: 2026-09-21. This is a reference resource, not a claim that we conducted the studies or tested a product.