Para quem ainda não está familiarizado, sugiro a leitura destas 4 postagens para compreender a importância de basear as condutas em alto nível de evidência:
- O que é uma referência bibliográfica aceitável? 1 – Peer Review
- O que é uma referência bibliográfica aceitável? 2 – Alguns estudos são mais importantes
- O que é uma referência bibliográfica aceitável? 3 – Estudos epidemiológicos ajudam – quando mostram o contrário
- O que é uma referência bibliográfica aceitável? 4 – Estudo em animais
A Public Health Collaboration, uma organização sem fins lucrativos do Reino Unido dedicada a divulgar dados científicos sobre alimentação, e que já fez um relatório que deu o que falar na Inglaterra em maio passado (veja aqui), compilou agora todos os ensaios clínicos randomizados nos quais low carb foi comparado com low fat. Quando eu afirmo que a preponderância da literatura favorece low carb, eis as evidências:
- São 54 ensaios clínicos randomizados ao todo
- Dentre estes 54, em 47 deles low carb produziu perda de peso maior, em 2 deles foi igual, e em 5 low fat foi melhor.
- A perda de peso com low carb foi maior COM SIGNIFICÂNCIA ESTATÍSTICA em 27 dos 54 estudos
- Não houve perda de peso maior com low fat, com significância estatística, em NENHUM dos estudos
Com vocês, a totalidade da evidência:
Tabela de ensaios clínicos randomizados comparando dietas de baixo carboidrato (com menos de 130g de carboidratos por dia) com dietas de baixa gordura (com menos de 35% de gorduras ao dia):
Tim e Fr am e Low Car b (LC) Low Fat (LF) Subje cts
& Re fe re nce We ight Los s We ight Los s (LC v LF) | |||
6 Months [1] |
8.5k g* |
3.9kg |
22 v 20 |
12 Months [2] |
4.3k g |
2.5kg |
20 v 17 |
6 Months [3] |
5.8k g* |
1.9kg |
43 v 36 |
12 Weeks [4] |
9.9k g* |
4.1kg |
16 v 14 |
12 Weeks [5] |
6.2k g* |
3.4kg |
22 v 23 |
24 Weeks [6] |
12.7k g* |
7.2kg |
46 v 34 |
30–50 Days [7] |
5.5k g* |
3.5kg |
28 v 28 |
10 Weeks [8] |
7.0k g |
6.8kg |
15 v 16 |
6 Weeks [9] |
6.2k g |
6.0kg |
16 v 16 |
6 Weeks [10] |
6.4k g* |
4.2kg |
12 v 11 |
3 Months [11] |
3.55k g* |
0.92kg |
40 v 39 |
12 Weeks [12] |
6.3k g |
5.3kg |
49 v 47 |
12 Months [13] |
4.7k g* |
2.2kg |
68 v 61 |
8 Weeks [14] |
7.8k g* |
6.4kg |
48 v 45 |
3 Months [15] |
6.9k g* |
2.1kg |
10 v 10 |
24 Weeks [16] |
11.1k g* |
6.9kg |
21 v 29 |
2 Y ears [17] |
5.5k g* |
3.3kg |
83 v 94 |
8 Weeks [18] |
7.5k g* |
6.2kg |
52 v 47 |
24 Weeks [19] |
11.9k g |
10.1kg |
45 v 43 |
12 Weeks [20] |
10.1k g* |
5.2kg |
20 v 20 |
12 Months [21] |
14.5k g |
11.5kg |
33 v 36 |
13 Weeks [22] |
13.2k g* |
7.3kg |
18 v 15 |
24 Months [23] |
3.6k g |
3.1kg |
31 v 30 |
3 Months [24] |
5.5k g* |
2.6kg |
15 v 18 |
12 Months [25] |
5.6k g* |
1.4kg |
59 v 60 |
4 Months [26] |
9.79k g* |
6.14kg |
20 v 20 |
8 Weeks [27] |
8.4k g* |
6.7kg |
32 v 28 |
12 Months [28] |
3.1k g |
3.1k g |
47 v 49 |
2 Y ears [29] |
6.34kg |
7.37k g |
154 v 153 |
24 Months [30] |
1.5k g |
0.2kg |
28 v 40 |
12 Weeks [31] |
6.8k g |
5.2kg |
18 v 15 |
12 Weeks [32] |
8.0k g* |
6.4kg |
24 v 21 |
1 Y ear [33] |
13.7k g |
13.7k g |
55 v 51 |
1 Y ear [34] |
5.1k g |
3.1kg |
62 v 64 |
48 Weeks [35] |
11.37k g |
9.62kg |
57 v 65 |
3 Months [36] |
5.0k g |
3.7kg |
63 v 66 |
24 Weeks [37] |
12.0k g |
11.5kg |
46 v 47 |
6 Months [38] |
6.0k g |
5.9kg |
57 v 174 |
1 Y ear [39] |
2.1kg |
3.0k g |
40 v 40 |
6 Weeks [40] |
6.1k g* |
3.9kg |
15 v 15 |
24 Weeks [41] |
7.1k g* |
4.7kg |
28 v 30 |
3 Months [42] |
7.6k g* |
4.3kg |
22 v 19 |
6 Months [43] |
4.3k g |
4.0kg |
29 v 30 |
6 Months [44] |
2.6k g |
1.4kg |
12 v 12 |
8 Weeks [45] |
7.4k g |
6.5kg |
12 v 12 |
6 Months [46] |
6.8k g |
5.6kg |
53 v 57 |
3 Months [47] |
3.4kg |
4.1k g |
150 v 150 |
12 Months [48] |
11.8k g* |
6.9kg |
55 v 55 |
1 Y ear [49] |
2.9kg |
3.7k g |
30 v 30 |
6 Months [50] |
8.5k g* |
3.5kg |
43 v 35 |
52 Weeks [51] |
9.8kg |
10.1k g |
41 v 37 |
6 Months [52] |
9.1k g |
8.9kg |
25 v 24 |
6 Months [53] |
8.0k g |
5.7kg |
21 v 17 |
6 Months [54] |
1.6k g* |
0.6kg |
30 v 32 |
Totals : |
27/54 Ar e Sig. > |
0/54 Ar e Sig. > |
2101 v 2197 |
47/54 Are > LF |
5/54 Are > LC | ||
(2 Ar e Equal) | |||
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