Best Caffeine, Green Tea, Carnitine & Fiber

Ranked on cost math, clinical dose auditing, label disclosure and buyer ratings. 36 verified products today.

Ranking

1 NUTRABIO Caffeine 200mg 9.6 composite $0.080per dosed serving
2 NUTRICOST Nutricost Natural Caffeine Capsules 200mg 250 Capsules 9.5 composite $0.080per dosed serving
3 NUTRICOST Nutricost Caffeine L-Theanine 8.3 composite $0.089per dosed serving

Pick up to four rows, then read them side by side.


1	Caffeine 200mg	9.61	85%	10.0	8.9	$0.080
2	Nutricost Natural Caffeine Capsules 200mg 250 Capsules	9.54	100%	10.0	9.4	$0.080
3	Nutricost Caffeine L-Theanine	8.32	100%	7.5	8.3	$0.089
4	Green Tea Extract 1800 mg Per Serving 180 Capsules	8.24	85%	10.0	5.0	$0.322
5	Caffeine Pills 220mg with Green Tea 500 Tablets	7.70	85%	5.1	10.0	$0.076
6	Caffplus	7.45	85%	8.8	4.4	$0.343
7	Caffeine Pills	7.23	100%	5.0	7.8	$0.100
8	L-Carnitine Base Powder	7.13	100%	5.0	7.2	$0.130
9	Green Tea Extract 500mg	6.57	85%	5.6	6.1	$0.296
10	L-Carnitine L-Tartrate Powder	6.34	100%	3.4	6.7	$0.179
11	Nutricost L-Carnitine Tartrate Powder	5.78	100%	3.4	5.6	$0.316
12	BB L-Carnitine	5.69	85%	7.5	1.1	$0.888
13	Green Tea Extract 450mg	5.52	85%	5.1	3.9	$0.457
14	L-Carnitine 3000	5.19	100%	5.8	0.0	$1.601
15	Nutricost L-Carnitine Tartrate 500mg 240 Capsules	4.99	100%	3.4	2.8	$0.537
16	L-Carnitine L-Tartrate Capsules	4.54	85%	3.4	3.3	$0.472
17	Evlution L-Carnitine500 Capsules 120 Servings	4.13	100%	1.7	1.7	$0.830
18	L-Carnitine 500mg 60 Capsules	3.72	85%	2.5	2.2	$0.679
19	L-Carnitine 500mg	3.14	85%	2.5	0.6	$1.107
20	Green Tea 50 Polyphenols Powder	not enough data	30%	not enough data	not enough data	not enough data
21	L-Carnitine Liquid Shots 3000mg	not enough data	30%	not enough data	not enough data	not enough data
22	Psyllium Husk	not enough data	30%	not enough data	not enough data	not enough data
23	Nutricost Psyllium Husk 500mg 500 Capsules	not enough data	30%	not enough data	not enough data	not enough data
24	Nutricost Glucomannan Powder 500 Grams Unflavored	not enough data	30%	not enough data	not enough data	not enough data
25	L-Carnitine w/ Fucoxanthin	not enough data	30%	not enough data	not enough data	not enough data
26	Organic Green Tea Extract Powder	not enough data	30%	not enough data	not enough data	not enough data
27	Nutricost Glucomannan 600mg 180 Capsules	not enough data	30%	not enough data	not enough data	not enough data
28	Nutricost Psyllium Husk Ground Powder 1 lb	not enough data	30%	not enough data	not enough data	not enough data
29	Psyllium Husk Capsules	not enough data	15%	not enough data	not enough data	not enough data
30	Psyllium Husk	not enough data	15%	not enough data	not enough data	not enough data
31	L-Carnitine Liquid 3000mg 16 oz	not enough data	15%	not enough data	not enough data	not enough data
32	Fiber Supplement	not enough data	15%	not enough data	not enough data	not enough data
33	Glucomannan Pills	not enough data	15%	not enough data	not enough data	not enough data
34	Green Tea Pills	not enough data	15%	not enough data	not enough data	not enough data
35	Konjac Root Glucomannan	not enough data	15%	not enough data	not enough data	not enough data
36	Nutricost Psyllium Husk Whole Powder 8 oz	not enough data	15%	not enough data	not enough data	not enough data

Click a column header to sort. not enough data means the number could not be verified from the label or price on record — never estimated.

How this ranking is built

Component	Weight	Basis
Dose integrity	40%	Share of key actives meeting clinical thresholds, minus a blend penalty
Value	30%	Cost per fully dosed serving, ranked against the category
Label disclosure	15%	Share of the actives the label puts a number against. An amount hidden in a proprietary blend, or simply not stated, scores zero here rather than counting as missing data — non-disclosure is a fact about a label, not an absence of one
Consensus	15%	Buyer rating shown on the brand’s own product page (read from the page, or from the review service that draws its stars; source-linked), minimum 25 reviews, re-read within the last 30 days, count, source and capture date printed on every product page

A missing component is never scored as zero. Its weight is redistributed across the components that exist, and the page says which one was omitted.

Head to head

The same numbers as above, two products at a time.