# Caffeine Anhydrous

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/caffeine-anhydrous
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-03-18
**Evidence Score:** 8 / 10
**Category:** Other
**Also Known As:** 1,3,7-trimethylxanthine, anhydrous caffeine, caffeine USP, methyltheobromine, theine, guaranine, mateine, coffeine

## Overview

Caffeine anhydrous is a dehydrated form of caffeine that blocks adenosine receptors in the brain to enhance alertness and [physical performance](/ingredients/condition/energy). This stimulant increases [dopamine](/ingredients/condition/mood) and norepinephrine levels while promoting [fat oxidation](/ingredients/condition/weight-management) through phosphodiesterase inhibition.

## Health Benefits

- Boosts [physical performance](/ingredients/condition/energy) by enhancing energy production, which can improve endurance and strength. - Increases mental alertness by blocking adenosine receptors, which can enhance focus and concentration. - Supports weight management by stimulating thermogenesis, which can increase calorie burning. - Enhances mood by increasing [dopamine](/ingredients/condition/mood) levels, which can improve motivation and well-being. - Reduces fatigue by delaying the onset of exhaustion, allowing for longer and more intense workouts. - Improves reaction time by enhancing neural transmission, which can benefit athletes and busy professionals. - Supports [metabolic rate](/ingredients/condition/weight-management) by increasing lipolysis, which can aid in fat loss.

## Mechanism of Action

Caffeine anhydrous acts as an adenosine receptor antagonist, preventing adenosine from binding to A1 and A2A receptors in the brain, which normally promote sleepiness. It inhibits phosphodiesterase enzymes, increasing cyclic adenosine monophosphate (cAMP) levels, which enhances lipolysis and [thermogenesis](/ingredients/condition/weight-management). Additionally, it increases [dopamine](/ingredients/condition/mood) and norepinephrine release in the central nervous system, improving mood and [cognitive function](/ingredients/condition/cognitive).

## Clinical Summary

Randomized controlled trials with 200-400mg caffeine anhydrous show 3-7% improvements in endurance performance and 11-12% increases in fat oxidation during exercise. Meta-analyses of cognitive studies demonstrate significant improvements in attention, reaction time, and [working memory](/ingredients/condition/cognitive) within 30-60 minutes of consumption. Weight loss studies indicate 2-4% increases in [metabolic rate](/ingredients/condition/weight-management) lasting 2-3 hours post-ingestion. Evidence quality is considered moderate to high for performance and cognitive benefits, with most studies using healthy adult populations of 15-50 participants.

## Nutritional Profile

Caffeine Anhydrous (1,3,7-trimethylxanthine) is a purified, dehydrated form of caffeine with approximately 0.5% or less moisture content, making it ~20% more concentrated by weight than caffeine found in coffee. It contains no macronutrients (0g protein, 0g fat, 0g carbohydrates), no dietary fiber, no vitamins, and no minerals in meaningful quantities. The primary bioactive compound is caffeine itself, typically present at 99%+ purity in supplement-grade powder. Standard dosing in supplements ranges from 100–200mg per serving, with some pre-workouts containing up to 300–400mg. As a xanthine alkaloid, it also contains trace structural relatives including minor xanthine derivatives depending on manufacturing source. Bioavailability is high: caffeine anhydrous is rapidly and nearly completely absorbed from the gastrointestinal tract, with bioavailability approaching 100%. Peak plasma concentrations are reached within 30–60 minutes of ingestion, faster than caffeine from beverages due to absence of water and binding compounds. Half-life ranges from 3–7 hours depending on individual [metabolic rate](/ingredients/condition/weight-management) (CYP1A2 enzyme activity). It is lipid- and water-soluble, allowing it to cross the blood-brain barrier efficiently. No caloric value. No significant fiber, [antioxidant](/ingredients/condition/antioxidant) polyphenols, or chlorogenic acids are present, distinguishing it from whole coffee or tea sources.

## Dosage & Preparation

Typical dosage ranges from 100-200 mg per day. Consult a healthcare provider before use.

## Safety & Drug Interactions

Common side effects include jitteriness, [insomnia](/ingredients/condition/sleep), increased heart rate, and digestive upset, particularly with doses exceeding 400mg daily. Caffeine anhydrous can interact with medications including blood thinners, heart medications, and certain antidepressants by affecting cytochrome P450 enzymes. Individuals with anxiety disorders, [cardiovascular](/ingredients/condition/heart-health) conditions, or caffeine sensitivity should avoid or limit use. Pregnant and breastfeeding women should limit intake to under 200mg daily due to increased miscarriage risk and potential effects on fetal development.

## Scientific Research

Extensive research supports caffeine's efficacy in enhancing alertness and athletic performance, with numerous RCTs validating its benefits.

## Historical & Cultural Context

Caffeine has been consumed for centuries in various forms, from traditional coffee and tea to modern energy supplements.

## Synergistic Combinations

L-Theanine, Beta-Alanine, Creatine

## Known Interactions

| Substance | Severity | Summary | URL |
|---|---|---|---|
| Pre-Workout Complex | SAFE | 🟢 SAFE — Caffeine Anhydrous and Pre-Workout Complex can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/pre-workout-complex |
| Nitric Oxide Boosters | SAFE | 🟢 SAFE — Caffeine Anhydrous and Nitric Oxide Boosters can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/nitric-oxide-boosters |
| ZMA | SAFE | 🟢 SAFE — Caffeine Anhydrous and ZMA can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/zma |
| Protein Powder | SAFE | 🟢 SAFE — Caffeine Anhydrous and Protein Powder can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/protein-powder |
| Methadone | SAFE | 🟢 SAFE — Caffeine Anhydrous and Methadone can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/methadone |
| Buprenorphine | SAFE | 🟢 SAFE — Caffeine Anhydrous and Buprenorphine can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/buprenorphine |
| Naltrexone | SAFE | 🟢 SAFE — Caffeine Anhydrous and Naltrexone can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/naltrexone |
| Naloxone | SAFE | 🟢 SAFE — Caffeine Anhydrous and Naloxone can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/naloxone |
| Memantine | SAFE | 🟢 SAFE — Caffeine Anhydrous and Memantine can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/memantine |
| Donepezil | SAFE | 🟢 SAFE — Caffeine Anhydrous and Donepezil can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/donepezil |
| Levodopa-Carbidopa | SAFE | 🟢 SAFE — Caffeine Anhydrous and Levodopa-Carbidopa can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/levodopa-carbidopa |
| Amitriptyline | SAFE | 🟢 SAFE — Caffeine Anhydrous and Amitriptyline can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/amitriptyline |
| Nortriptyline | SAFE | 🟢 SAFE — Caffeine Anhydrous and Nortriptyline can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/nortriptyline |
| Doxepin | SAFE | 🟢 SAFE — Caffeine Anhydrous and Doxepin can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/doxepin |
| Clomipramine | SAFE | 🟢 SAFE — Caffeine Anhydrous and Clomipramine can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/clomipramine |
| Phentermine | SAFE | 🟢 SAFE — Caffeine Anhydrous and Phentermine can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/phentermine |
| Liraglutide | SAFE | 🟢 SAFE — Caffeine Anhydrous and Liraglutide can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/liraglutide |
| Canagliflozin | SAFE | 🟢 SAFE — Caffeine Anhydrous and Canagliflozin can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/canagliflozin |
| Glimepiride | SAFE | 🟢 SAFE — Caffeine Anhydrous and Glimepiride can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/glimepiride |
| Digoxin | SAFE | 🟢 SAFE — Caffeine Anhydrous and Digoxin can be taken together safely. | https://ingredients.hermeticasuperfoods.com/interactions/digoxin |

## Frequently Asked Questions

### What is the difference between caffeine anhydrous and regular caffeine?

Caffeine anhydrous is caffeine with water molecules removed, making it more concentrated and faster-absorbing than regular caffeine. It contains 99.5% pure caffeine compared to coffee's 1-2% caffeine content, providing more predictable dosing and quicker onset of effects within 15-30 minutes.

### How much caffeine anhydrous should I take for workout benefits?

Research shows 200-400mg of caffeine anhydrous taken 30-60 minutes before exercise optimizes performance benefits. This equals roughly 3-6mg per kilogram of body weight, with 400mg being the upper safe limit to avoid side effects like jitters and rapid heartbeat.

### Can caffeine anhydrous help with weight loss?

Caffeine anhydrous can support weight loss by increasing metabolic rate by 3-11% and enhancing fat oxidation by up to 29%. However, tolerance develops within 1-2 weeks of regular use, and it should be combined with proper diet and exercise for meaningful results.

### When should I avoid taking caffeine anhydrous?

Avoid caffeine anhydrous within 6 hours of bedtime as it can disrupt sleep quality and duration. Also avoid if you have anxiety disorders, heart arrhythmias, high blood pressure, or are pregnant, as it can exacerbate these conditions.

### How long do the effects of caffeine anhydrous last?

Caffeine anhydrous effects peak within 30-60 minutes and last 3-6 hours in most people. The compound has a half-life of 4-6 hours, meaning half the dose remains in your system after this time, which is why afternoon consumption can affect nighttime sleep.

### Does caffeine anhydrous interact with common medications or supplements?

Caffeine anhydrous can interact with certain medications including some antidepressants, blood pressure medications, and antibiotics by increasing their effects or side effects. It may also interact with other stimulants or supplements containing caffeine, leading to excessive stimulation. If you take prescription medications, consult your healthcare provider before adding caffeine anhydrous to your routine to ensure safety and avoid potential interactions.

### Is caffeine anhydrous safe for athletes competing in sports with drug testing?

Caffeine anhydrous is permitted by most major sports organizations including the NCAA, IOC, and professional sports leagues, and is not considered a banned substance. However, some sports have upper limits on acceptable caffeine levels in urine samples, so athletes should be aware of their sport's specific regulations. Always check with your sport's governing body or anti-doping agency for current guidelines before supplementing.

### What is the difference in effectiveness between caffeine anhydrous capsules versus powder?

Both forms deliver the same active ingredient and have comparable bioavailability, though powder may be absorbed slightly faster due to faster dissolution in the digestive system. Capsules offer precise dosing and convenience, while powder allows for flexible dosing adjustments and faster absorption when mixed with liquid. Your choice between forms should depend on personal preference, desired onset speed, and convenience factors rather than efficacy differences.

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*Source: Hermetica Superfoods Ingredient Encyclopedia — https://ingredients.hermeticasuperfoods.com*
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