R146 guidelines state that the permitted tolerance for protein is:

<10g/100g: ±2 g

≥10g/100g: ±25%

Green - Optimal.
Orange - Acceptable.
Red - Unacceptable and outside of legal limit.

Results correct at publishing date: October 2015

*Subsequent batches have been tested and comply

Brand	Product name	PROTEIN CONTENT CLAIMED ON LABEL PER 100G	Analysed Amount per 100g	% difference
BIOGEN	Bulk 45/150	20	18.2	9.00
BIOGEN	Diet Protein	56.2	53.0	5.78
BIOGEN	Nitro Mass	30.1	30.3	-0.50
BIOGEN	Nitro Plex	51.4	49.6	3.50
BIOGEN	Premium Iso-Whey	70.1	66.2	5.58
BIOGEN	Protein SR8	78	74.4	4.68
BIOGEN	Whey Isolate Plus	83.2	78.9	5.17
BPI*	Whey HD	65.8	36.6	44.38
Body Logix	Vegan Protein	62.5	54.2	13.36
BSN	Syntha 6	46.8	43.4	7.26
BSN	True Mass	15.92	16.3	-2.39
Cellucor	Whey Protein	71.43	68.4	4.31
Clicks	Rapid Muscle Grow	37.4	32.1	14.17
Evox	Formidable Mass	17	16.3	4.12
Evox	Lean Pro Diet	76	68.3	10.20
Evox	Muscle Meal	41	38.8	5.37
Evox	Synergy Whey Protein	76	65.7	13.62
Evox	100% Whey Protein	72	57.6	20.07
GNC	Performance Whey Protein	67.61	66.4	1.86
Inner Armour	Nitro Peak	66.67	62.0	7.00
Myofusion	Elite Protein Series	67.6	67.2	0.59
Muscle Junkie	Freak Mass Mutater	16.8	14.2	15.48
Muscle Junkie	Whey Protein O.D	74	63.9	13.72
Muscle Med	Carnivor Mass	27	30.7	-13.70
Muscle Med	Carnivor	64.91	71.0	-9.31
MHP	Paleo Protein	60.8	64.0	-5.26
MHP	Up Your Mass	34.59	27.9	19.34
Met-Rx	Whey Protein	73.3	71.2	2.93
Muscle Tech	Anabolic Halo	58.82	54.6	7.17
Muscle Tech	Mass Tech	24.71	24.5	1.05
Muscle Tech	Nitrotech	83.3	82.3	1.26
Muscle Tech	Phase 8	61.5	58.3	5.20
Muscle Tech	100% Premium Whey Protein	63.4	59.6	6.07
Muscle works	Anabolic Whey	57	54.5	4.47
Nutri Tech	Casein Slow Release	78.89	59.3	24.83
Nutri Tech	Diet Meal	66	38.3	42.05
Nutri Tech	Anabolic Mass Builder	37.5	7.5	80.13
Nutri Tech	Premium Pure Whey Protein Lite	72	63.2	12.22
Nutri Tech	Premium Pure Whey Protein	72	62.7	12.92
Optimum Nutrition	Gold Standard 100% Whey	78.9	74.0	6.21
Optimum Nutrition	Lean Whey	77	73.4	4.68
Optimum Nutrition	Serious Mass	15.4	14.7	4.87
PharmaFreak	Freak Protein	69.4	67.9	2.16
PharmaFreak	Mass Freak	20	19.3	3.50
Supplements SA	Massive Muscle	37.5	8.5	77.41
Supplements SA	Pure Whey Protein	83.3	40.1	51.86
SSN	Micellar Casein Protein	70	63.3	9.64
SSN	Lean MRP	56	49.4	11.79
SSN	Mass Addiction	16.67	14.6	12.42
SSN	Anabolic Mass Builder	33.5	32.1	4.18
SSN	Performance Whey Protein	68	70.9	-4.26
SSN	100% Whey Protein	75	68.0	9.40
SupaShape	Diet Whey Protein	59	54.4	7.80
SupaShape	Pure Whey Protein	72	65.3	9.31
Titan	After Math	72.5	66.0	8.97
Titan	Iso Max	92.4	82.1	11.20
Titan	Mass Prodigy	28	26.4	5.89
Titan	Pro Whey	74	68.0	8.11
Titan	Slim Core	51.6	48.9	5.33
USP Labs	Oxyelite Protein	63.89	61.4	3.98
USN	Casein Protein Slow Release	71.1	69.6	2.11
USN	Diet Fuel Ultra Lean	48.15	46.2	4.05
USN	Fast Grow Anabolic All In One	33.4	36.2	-8.23
USN	Hyperbolic Mass	16.6	15.8	5.12
USN	Hardcore Whey GH	78.8	74.2	5.84
USN	Lean 8 Multi Phase Pro	50	46.7	6.70
USN	Muscle Fuel STS	34.5	32.3	6.52
USN	100% Whey Protein Plus	65.5	63.0	3.82
Universal	Real Gains	34.2	31.2	8.92
Weider	100% Whey Isolate Protein	88.5	77.1	12.94