caffiene effect testosterone levels? - UK-Muscle Body Building Community

big_nige · 23-04-2008, 04:20 PM

hi guys im on a extremely low carb diet to rip up and before training i need a pick me up like caffiene ive been reading that it can lower test levels?
is that true?

TH&S · 23-04-2008, 04:21 PM

http://www.warriorfx.com/2008/03/caf...ring-exercise/

There you go

big_nige · 23-04-2008, 04:25 PM

cheers matey

big_nige · 23-04-2008, 04:27 PM

so really stick to below 400mg

TH&S · 23-04-2008, 04:33 PM

Quote:

Originally Posted by big_nige

so really stick to below 400mg

If you have BP issues yes.

Personally I wouldn't use lots pre workout - perhaps a strong coffee at most, unless you are looking to hit a big PB.

Lost Soul · 23-04-2008, 04:38 PM

Maybe you should consider low carbohydrates on test levels rather than caffeine?

400mg is about 5-6 cups of coffee or 2 supplement size servings

TH&S · 23-04-2008, 04:45 PM

Quote:

Originally Posted by Lost Soul

Maybe you should consider low carbohydrates on test levels rather than caffeine?

400mg is about 5-6 cups of coffee or 2 supplement size servings

Why would low carb levels have a marked negative impact on T levels...?

If anything, assuming low carb/high fat/med protein free serum test would increase....

big_nige · 23-04-2008, 11:10 PM

? i dont no im on a low carb diet med fat high protein an feel week as hell

TH&S · 23-04-2008, 11:12 PM

Quote:

Originally Posted by big_nige

? i dont no im on a low carb diet med fat high protein an feel week as hell

Thats the problem.

Low/Zero Carb
High Fat
Med Protein

Protein is a poor energy source. With Low Carbs and Med Fats you won't be getting enough energy...

Lost Soul · 23-04-2008, 11:16 PM

Quote:

Originally Posted by TH&S

Why would low carb levels have a marked negative impact on T levels...?

If anything, assuming low carb/high fat/med protein free serum test would increase....

nope

http://grande.nal.usda.gov/ibids/ind...&therow=257678

TH&S · 23-04-2008, 11:22 PM

Quote:

Originally Posted by Lost Soul

nope

http://grande.nal.usda.gov/ibids/ind...&therow=257678

I think you've quoted the wrong study bud...

Quote:

The aim of this study was to determine if a change in protein/carbohydrate ratio influences plasma steroid hormone concentrations. There is little information about the effects of specific dietary components on steroid hormone metabolism in humans. Testosterone concentrations in seven normal men were consistently higher after ten days on a high carbohydrate diet (468 +/- 34 ng/dl, mean +/- S.E.) than during a high protein diet (371 +/- 23 ng/dl, p less than 0.05) and were accompanied by parallel changes in sex hormone binding globulin (32.5 +/- 2.8 nmol/l vs. 23.4 +/- 1.6 nmol/l respectively, p less than 0.01). By contrast, cortisol concentrations were consistently lower during the high carbohydrate diet than during the high protein diet (7.74 +/- 0.71 micrograms/dl vs. 10.6 +/- 0.4 micrograms/dl respectively, p less than 0.05), and there were parallel changes in corticosteroid binding globulin concentrations (635 +/- 60 nmol/l vs. 754 +/- 31 nmol/l respectively, p less than 0.05). The diets were equal in total calories and fat. These consistent and reciprocal changes suggest that the ratio of protein to carbohydrate in the human diet is an important regulatory factor for steroid hormone plasma levels and for liver-derived hormone binding proteins.

Thats not High Carb / Low Fat vs High Fat / Low Carb

Lost Soul · 23-04-2008, 11:26 PM

No, study is right in response to the original question

Quote:

Originally Posted by big_nige

hi guys im on a extremely low carb diet to rip up and before training i need a pick me up like caffiene ive been reading that it can lower test levels?
is that true?

TH&S · 23-04-2008, 11:53 PM

Quote:

Originally Posted by Lost Soul

No, study is right in response to the original question

Nope.

Your study shows differing T levels between High Pro and High Cho diets.

OQ was about the affect of Caffeine on T Pre-WO.

But anyway... OP has reduced his carbs. Does this mean a reduction in T? No.

Quote:

Body composition and hormonal responses to a carbohydrate-restricted diet

The few studies that have examined body composition after a carbohydrate-restricted diet have reported enhanced fat loss and preservation of lean body mass in obese individuals. The role of hormones in mediating this response is unclear. We examined the effects of a 6-week carbohydrate-restricted diet on total and regional body composition and the relationships with fasting hormone concentrations. Twelve healthy normal-weight men switched from their habitual diet (48% carbohydrate) to a carbohydrate-restricted diet (8% carbohydrate) for 6 weeks and 8 men served as controls, consuming their normal diet. Subjects were encouraged to consume adequate dietary energy to maintain body mass during the intervention. Total and regional body composition and fasting blood samples were assessed at weeks 0, 3, and 6 of the experimental period. Fat mass was significantly (P [le ] .05) decreased ([minus ]3.4 kg) and lean body mass significantly increased (+1.1 kg) at week 6. There was a significant decrease in serum insulin ([minus ]34%), and an increase in total thyroxine (T₄) (+11%) and the free T₄ index (+13%). Approximately 70% of the variability in fat loss on the carbohydrate-restricted diet was accounted for by the decrease in serum insulin concentrations. There were no significant changes in glucagon, total or free testosterone, sex hormone binding globulin (SHBG), insulin-like growth factor-I (IGF-I), cortisol, or triiodothyronine (T₃) uptake, nor were there significant changes in body composition or hormones in the control group. Thus, we conclude that a carbohydrate-restricted diet resulted in a significant reduction in fat mass and a concomitant increase in lean body mass in normal-weight men, which may be partially mediated by the reduction in circulating insulin concentrations.

TH&S · 24-04-2008, 12:04 AM

Quote:

Originally Posted by TH&S

Why would low carb levels have a marked negative impact on T levels...?

If anything, assuming low carb/high fat/med protein free serum test would increase....

And just to back up my claims, heres some more reading for what its worth:

Quote:

Effects of dietary fat and fiber on plasma and urine androgens and estrogens in men: a controlled feeding study.

We conducted a controlled feeding study to evaluate the effects of fat and fiber consumption on plasma and urine sex hormones in men. The study had a crossover design and included 43 healthy men aged 19-56 y. Men were initially randomly assigned to either a low-fat, high-fiber or high-fat, low-fiber diet for 10 wk and after a 2-wk washout period crossed over to the other diet. The energy content of diets was varied to maintain constant body weight but averaged approximately 13.3 MJ (3170 kcal)/d on both diets. The low-fat diet provided 18.8% of energy from fat with a ratio of polyunsaturated to saturated fat (P:S) of 1.3, whereas the high-fat diet provided 41.0% of energy from fat with a P:S of 0.6. Total dietary fiber consumption from the low- and high-fat diets averaged 4.6 and 2.0 g.MJ-1.d-1, respectively. Mean plasma concentrations of total and sex-hormone-binding-globulin (SHBG)-bound testosterone were 13% and 15% higher, respectively, on the high-fat, low-fiber diet and the difference from the low-fat, high-fiber diet was significant for the SHBG-bound fraction (P = 0.04). Men's daily urinary excretion of testosterone also was 13% higher with the high-fat, low-fiber diet than with the low-fat, high-fiber diet (P = 0.01). Conversely, their urinary excretion of estradiol and estrone and their 2-hydroxy metabolites were 12-28% lower with the high-fat, low-fiber diet (P < or = 0.01). Results of this study suggest that diet may alter endogenous sex hormone metabolism in men.

Full study if you want the data:

http://www.ajcn.org/cgi/reprint/64/6/850

Lost Soul · 24-04-2008, 12:05 AM

The original poster has a low carb diet
I have stated low carb diets = lowered test levels
I have then linked an article stating the same

bottom line, lower carbs and crank up protein and you have lower test levels, hence why i asked why he was concerened about the minimal effects of caffeine on test when he was potentially battering T levels from low carbing

23-04-2008, 04:20 PM	#1 (permalink)
big_nige powerlifter/bodybuilder Join Date: Apr 2007 Posts: 122	caffiene effect testosterone levels? hi guys im on a extremely low carb diet to rip up and before training i need a pick me up like caffiene ive been reading that it can lower test levels? is that true?

23-04-2008, 04:21 PM	#2 (permalink)
TH&S #1 Bob Nutcher Join Date: Aug 2007 Posts: 4,746	Re: caffiene effect testosterone levels? http://www.warriorfx.com/2008/03/caf...ring-exercise/ There you go __________________ To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. \| To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. D: 220 \| B: 110 \| S: 170 \| Target: 550

23-04-2008, 04:25 PM	#3 (permalink)
big_nige powerlifter/bodybuilder Join Date: Apr 2007 Posts: 122	Re: caffiene effect testosterone levels? cheers matey

23-04-2008, 04:27 PM	#4 (permalink)
big_nige powerlifter/bodybuilder Join Date: Apr 2007 Posts: 122	Re: caffiene effect testosterone levels? so really stick to below 400mg

23-04-2008, 11:10 PM	#8 (permalink)
big_nige powerlifter/bodybuilder Join Date: Apr 2007 Posts: 122	Re: caffiene effect testosterone levels? ? i dont no im on a low carb diet med fat high protein an feel week as hell

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