BioTechUSA Creator

Mixed creatine forms· evidence: Limited

Some products mix several types of creatine, such as citrate, pyruvate, malate, magnesium chelate, ethyl ester or alpha-ketoglutarate, often under a branded blend name. The idea is that each form adds something, but there is no good evidence that a mix works better than the same amount of plain creatine monohydrate. One form, creatine ethyl ester, did worse than monohydrate in a controlled study because more of it broke down before reaching the muscle.

The main practical problem is that blends often do not say how much actual creatine you get, which makes it hard to check you reach 3 g a day.

Typical dose: Enough to provide 3 g of creatine a day; check the label

Safety: Same general precautions as creatine monohydrate. Speak to your GP first if you have a kidney condition.

Research we looked at:
Jäger R et al. (2011). Analysis of the efficacy, safety, and regulatory status of novel forms of creatine. Amino Acids 40:1369–1383.
Spillane M et al. (2009). The effects of creatine ethyl ester supplementation combined with heavy resistance training on body composition, muscle performance, and serum and muscle creatine levels. J Int Soc Sports Nutr 6:6.

Caffeine· evidence: Strong

Caffeine is one of the best-supported performance aids, with consistent research showing it can improve endurance, strength and alertness. The doses used in research are usually 3–6 mg per kg of body weight, taken about an hour before exercise.

The catch is the dose: it adds to any coffee, tea or energy drinks you already have, and it can disrupt sleep if taken later in the day. There is no authorised health claim for caffeine and sports performance in the UK.

Typical dose: Research doses are 3–6 mg per kg of body weight

Safety: High caffeine content. Not recommended for children or pregnant or breastfeeding women. Healthy adults should keep total caffeine from all sources to no more than 400 mg a day and 200 mg at a time. Avoid late in the day and do not combine with other caffeine products.

Research we looked at:
Guest NS et al. (2021). International Society of Sports Nutrition position stand: caffeine and exercise performance. J Int Soc Sports Nutr 18:1.
EFSA NDA Panel (2015). Scientific opinion on the safety of caffeine. EFSA Journal 13(5):4102.

Rated well on Amazon, but many of the reviews come from Amazon Vine reviewers who received the product free, mostly in other European countries. They describe it as convenient and well tolerated. One noted the number of capsules makes it awkward to take.

Our own summary of the Amazon UK listing for this product (about 96 ratings, including reviews from other Amazon countries), read 9 October 2026. These are not SupplementHQ customer reviews, and we include the complaints as well as the praise.