We are sure that HSN® is your best purchase option and that is why we want to answer any questions you may have.
The product reviews and opinions published reflect only the customers’ views and experiences. HSN does not verify or endorse such comments or claims, and is not responsible for the content provided in the reviews. Statements regarding food supplements have not been evaluated by the EFSA (European Food Safety Authority) and are not intended to diagnose, treat, cure, or prevent any disease or medical condition.
Miguel |
VERIFIED OPINION
SMART CAFFEINE
Very effective
Highly recommended product to be able to study or stay awake even more than twelve hours.
David |
VERIFIED OPINION
SMART CAFFEINE
Improved alertness
Improves alertness and concentration. Theanine dampens the stimulating effect of caffeine and you don't feel jittery.
Maria |
VERIFIED OPINION
SMART CAFFEINE
Mental clarity
Excellent product for the mind. It gives mental clarity, you are awake and attentive, it makes you keep your concentration effortlessly.
Borja |
VERIFIED OPINION
SMART CAFFEINE
Perfect activator
I combine it with green tea extract and I love it. It helps me stay active easily.
Darío |
VERIFIED OPINION
SMART CAFFEINE
Do not notice much
I didn't notice a big difference, but it goes down easy and does its job for a boost, although I didn't notice too much.
Nacho |
VERIFIED OPINION
SMART CAFFEINE
Perfect for study
Smart caffeine has been a great ally for my study sessions. It helps me concentrate longer without feeling tired or distracted. Unlike coffee, it doesn't make me jittery or give me energy dips. I feel more awake, focused and clear-headed. Ideal for studying for hours and performing at my best.
Gonzalo |
VERIFIED OPINION
SMART CAFFEINE
Well
It doesn't hold as much as they say but it is perfect for long periods where you have to have high caffeine.
Rubén |
VERIFIED OPINION
SMART CAFFEINE
Prolonged energy without peaks.
Smart caffeine is a hit. It gives sustained energy and without the typical downer afterwards. Ideal for studying or training without nervousness or tachycardia. I notice more focus and less mental fatigue. A very convenient and effective format for everyday use.
Claudia |
VERIFIED OPINION
SMART CAFFEINE
Very good product
Very happy, I have noticed a big difference. It keeps me awake and focused but without generating anxiety.
Ana |
VERIFIED OPINION
SMART CAFFEINE
Effective
They were recommended to me and I think they will go better than a coffee, I'll value them properly in my next order.
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