Use the directions for the AminoDEX pack you have. For the 120-tablet bottle, Yamamoto Nutrition recommends five tablets once daily, before or after training. For the 24-sachet powder, mix one 8 g sachet with 250 mL of water and take it once daily. Avitazen’s AjiPure powder listing gives the serving and mixing instructions; Yamamoto’s Kyowa powder listing also specifies before or after training. Follow the timing printed on your own pack.
The serving stays the same if your workout moves from morning to evening. If you train twice, pick one session for your serving. On a rest day, the labels do not specify a separate schedule.
Serving Size and Preparation
AminoDEX Tablets
· Count five tablets for one serving from the 120-tablet bottle. Avitazen’s AminoDEX tablet directions say to take them with a glass of water.
· Use one serving in the day. The five tablets are the total daily amount on the label, even if you train more than once.
· If taking several tablets is awkward, check the directions for the sachet format. Its serving is measured differently, and its formula can differ from the tablets.
AminoDEX Powder
1. Measure 250 mL of water into a glass or shaker.
2. Empty one 8 g sachet into the water. Stir or shake until the powder dissolves.
3. Take the prepared drink as your one serving for the day.
The 8 g is the weight of the contents of the sachet. It includes the other ingredients in the formula, so it is not the amount of essential amino acids in the drink. If you are comparing sachets with tablets, look at the individual amounts on each nutrition panel. Keep the packet or take a photo of the directions if you carry loose sachets in your gym bag.
When to Take AminoDEX on Training Days
Before a Workout
Taking it before training is one of the options on the tablet label. It may suit a session that falls between meals, especially when you would rather have water and the tablets than carry a mixed drink. The label does not give a countdown in minutes. If you train first thing and tend to feel hungry or low on energy, plan a breakfast or snack that suits the session. The tablets cannot provide the carbohydrate or energy of that food.
After a Workout
After training can be easier if you are rushing out the door or prefer to keep your stomach light while exercising. You can plan the serving around getting home or back to your desk. If a normal meal is already on the way, there is no reason to delay it for the supplement. A meal with a source of protein and some carbohydrate can support recovery and replenish energy. For meal examples and more on timing, see Avitazen’s guide to protein before or after a workout.
Two Workouts in One Day
Choose one session around which to take the serving if you use AminoDEX. For example, if you eat breakfast after a morning run but travel directly from work to an evening lifting session, the later session may be the more practical one. Keep the same daily serving and plan food and fluids between sessions. The extra workout does not create a second serving.
Is Before or After Training Better?
The tablet directions allow either option. They do not identify an optimal minute or establish a benefit from taking the product on both sides of a session. In a six-person study, Tipton and colleagues found greater short-term uptake of phenylalanine, an amino acid, in the leg when participants drank an EAA and carbohydrate mixture before rather than after lifting. The study measured the response to a single session and did not use AminoDEX.
A 2025 review of protein timing trials found little evidence that choosing before rather than after training changed lean body mass gains. The review included five studies, with low to very low certainty across the outcomes assessed. Those studies tested protein intake rather than this product. For AminoDEX, the label and your meal schedule give you a sounder basis for choosing a time than a strict 30-minute rule.
Do You Need AminoDEX on Rest Days?
The product directions reviewed here do not give a separate rest-day protocol. A day off is not a reason to add a serving, and a harder session the day before is not a reason to double one. Keep regular meals on rest days too. If you trained late and are having breakfast the next morning, for example, eggs on toast or yogurt and oats are practical ways to include protein in that meal.
If you use the product on a day without training, check the directions on your pack and stay within its daily limit. The references to before or after training are relevant to workout days. They do not set a time of day for a rest-day serving. The same distinction applies if a session is cancelled: continue with your regular meals rather than trying to make up for the missed workout with an extra supplement.
Label Warnings and Storage
Keep the bottle or sachets in a cool, dry place away from direct sunlight and heat. Avoid leaving them in a hot car or in a damp gym bag. Yamamoto’s warnings advise against exceeding the labelled amount and call for medical advice before use during pregnancy, in children or over prolonged periods. The formulas list phenylalanine, which matters if you follow a prescribed low-phenylalanine diet.
Frequently Asked Questions
What if I Miss a Serving?
Skip the missed serving and continue with the usual amount the next time you choose to take it. There is no need to take two servings to catch up, whether you missed one on a workout day or on a day off.
Do I Need to Take AminoDEX on an Empty Stomach?
The directions reviewed do not require an empty stomach. If a particular time conflicts with a meal or feels uncomfortable, use another label-compatible time. Do not give up a planned meal simply to leave a gap for the supplement.
Can I Use Both AminoDEX Formats on the Same Day?
The tablet and powder directions describe separate daily servings. A full serving of each adds together their overlapping ingredients. Choose one format unless you have been given a specific plan by a qualified professional.