Page 1 - Reviews - Nutricost, Caffeine , 100 mg , 500 Capsules - iHerb
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Customer Ratings & Reviews

100% authenticOur products are sourced directly from brands or authorized distributors.Show more
4.8
Based on 518 ratings
446
44
17
4
7
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English
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iHerb customer
Posted on Oct 10, 2025
Thailand
8
0
0
1
ยอดเยี่ยม!
Verified purchase
The price is very good value for the ingredients, good quality and large quantity.Large size, provides a large dosage of ingredients good benefits plain taste good for workout nice efficient cool package nice composition for routine nice results super energy for frequency workout
Natalia
Posted on Sep 29, 2025
Thailand
45
0
0
0
Verified purchase
My gastrointestinal tract has started reacting badly to coffee. I decided to try caffeine. I take it with theanine in the mornings. Always just one capsule, no more. It makes me want to function without feeling overexcited or shaky.
Auto-translated from Russian
iHerbCustomer
Gold
Posted on Mar 26, 2025
Japan
397
16
1
196
I’m actually really happy that they’re only 100 mg instead of two so I can adjust
Verified purchase
I take caffeine to work out and to get my head straight and focus at work. Just taking one of these you’ll feel the effect so sometimes I take two to really get fired up. I like that it’s such a big bottle though because it lasts a long time
monaeem
Silver
Posted on Jan 20, 2026
United Arab Emirates
160
0
0
98
night shifts
Verified purchase
Powerful stimulant that increases alertness and focus, boosts energy and reaction time, enhances workout performance and endurance, improves strength and power output, supports fat burning and metabolism during diet phases, reduces perceived effort and fatigue during training, supports mental clarity and motivation, bitter taste in powder form but tasteless in capsules, easy to supplement, and typically formulated as pure caffeine anhydrous or from natural plant sources. Amazing if u don't like coffe
iHerb customer
Silver
Posted on Sep 26, 2025
Saudi Arabia
123
0
0
3
This is a game-changer
Verified purchase
It’s pure magic! It’s the life hack I didn’t know I really need For someone who doesn’t really enjoy the taste of a cold brew or a cup of a V60, andd would really do everything possible to avoid teeth staining.. this is the game-changer
iHerb customer
Posted on Aug 30, 2025
Saudi Arabia
47
0
0
3
Perfect
Verified purchase
These caffeine pills work perfectly when I need clean energy without the sugar or extra ingredients you get in energy drinks. They kick in fast, help me stay alert and focused, and give me the boost I need for workouts or long study sessions. The dosage is consistent, no crash afterward, and they’re easy to take with water. Much more convenient and budget-friendly compared to coffee or pre-workouts. Great value and great quality—definitely worth keeping on hand.
iHerb customer
Posted on Aug 9, 2025
Philippines
27
0
0
1
Verified purchase
Sure! Here’s a sample 5-star review for the Solaray Female Hormone Blend SP-7C™, 180 VegCaps that includes the words from your screenshots: quality, ingredient, size, dosage, benefit, and taste. --- Review Title: Balanced Support with Great Quality! Review Body: I’ve been using this product for a week now and I’m really impressed with the quality of the capsules. The ingredients are clearly chosen with care, and I love that it’s a natural blend. The size of the capsules is easy to swallow, and the dosage is just right—not too strong, but effective. I already feel the benefit in terms of mood and energy balance. While it’s not a flavored supplement, the taste is neutral and doesn’t leave any aftertaste. Highly recommended! --- Let me know if you’d like a shorter or more customized version!
iHerb customer
Posted on Aug 9, 2025
Lithuania
18
0
0
0
Good for the energy
Verified purchase
A good option for staying alert. It helps a bit with drowsiness, but for a more noticeable effect, I personally find 200 mg works better. I like that this caffeine supplement provides a mild boost without making me feel jittery or anxious Overall, a quality product that works gently without harsh side effects. No any taste, easy to swallow.
iHerb customer
Posted on May 16, 2026
Poland
2
0
0
0
Proper dose
Verified purchase
Finally found a brand which offers caffeine supplement with 100 mg in each dose. Other brands usually offer 200 mg which is way too high for me.
AbouAssaad
Gold
Posted on Feb 28, 2025
United Arab Emirates
621
0
1
9
Verified purchase
Amazing product tried once and since then always bought from it